Apply scheduled preset when monitor goes back on

[jpbaril]

Hi,

I tested this for a couple days and it seems that if a monitor was off at the time of a scheduled preset then when the monitor goes back on the appropriate preset will net be applied.

I don't know if it's a bug or just not a feature currently implemented but that would definitely be a nice addition so to never have to manually apply a preset.

[digitaltrails]

What are the circumstances:

What version of vdu_controls (listed in the About dialog)?

Is vdu_controls being used with ddcutil-service or just the ddcutil command?

Which of the following describes your situation?

1. The desktop actively being used on one or more monitors, and an additional monitor is powered up.
2. Desktop locked/sleeping with all monitors in DPMS sleep.
3. PC suspended/hibernating and now waking up.
4. PC powered off and now being restarted.

Case 1 is covered if vdu_controls is ddcutil-service, the preset that was last due will be restored. If not using the service, pressing the refresh button also restores the preset that was last due.

Case 2 was covered by looping the attempt to restore until it succeeds. This seems to still be working for a brief test just now. Possibly there may issues if the repeat drags on across midnight (local time), when the schedule updates (but I think that was tested). But changes to the handling of concurrency may also give room for new bugs.

Definitely forgot about 3, that would depend on what Qt does about its timer jobs when the PC wakes up. Hibernate/suspend is not something I use, so I hadn't even thought about it. If the Qt timers don't cover it, I should probably reimplement with code that checks if a preset is due or overdue and fires it.

Case 4 is similar to case one, on startup the preset that was last due will be restored. This code may be potentially be repurposed to cover more cases, such as case 3.

[jpbaril]

To be honest I don't quite understand these case descriptions. What usually happens is that I manually power off my monitor or that the screensaver launches. Few hours later I either power on the monitor or simply logs back in from the lock screen. My computer never goes to sleep.

I have 2.1.1. I was using ddcutil command but installed ddcutil-service today. Does not seem to have made a difference.

In fact, I just logged back in to type this answer and it did not apply my "night" preset as it should. Weirdly enough, it even went back to "noon" preset even though it had correctly applied earlier my "evening" preset (as monitor was on at that moment).

[digitaltrails]

OK, so this is more like case 2. Presumably the screen saver is sending the monitors into power saving, which is somewhat similar to turning them off (but not quite).

Anyway, I'm not seeing a similar behaviour. I have seen wacky behaviour if the system locale (e.g. NZ, AU, CN) and GPS coordinates don't match, but then the solar elevation chart would also look wrong.

What happens if you restart vdu_controls - does it kick in the right preset?

Perhaps consult your logs, presumably the systemd journal or stdout/stderr depending on how you are running vdu_controls or whether you have enabled the syslog logging.

Does the log contains any errors of interest.

In my case, if ddcutil-service is running, within a minute or so of powering up a monitor, I would expect to see:

ddcutil-service[3109]: Poll signal event - connected 1 ...

And shortly after, vdu_controls should log:

Received display_change D-Bus signal message.arguments()=...
Connected VDUs event DdcEventType.DISPLAY_CONNECTED flags=0 ...
...
Configuring application (reconfiguring=True)...
...
Scheduling presets reconfiguring=True
...
Restoring preset 'test' because its scheduled to be active at this time (2024-10-19 16:56:00.986289+13:00).
...

You could tar/zip up the logs and attach them here (remove anything sensitive logged by other processes).

Plus tar/zip up and attach your config directory.

[digitaltrails]

1. Are you using more than one monitor?
2. If yes, is this happening when only one of the two is turned off?

[jpbaril]

If I restart vdu_controls then the right preset always kicks in. Using only one monitor.

I'll check the logs tonight.

[jpbaril]

Here are some logs for anything "vdu" or "ddcutil". Weird thing I notice is that while the screen was off vdu_controls did try to apply the "sunset" preset at 17:54, yet when I turned on the screen at 18:12, the incorrect preset was applied.

oct 19 17:54:00 blackbox-ng vdu_controls.desktop[44497]: 17:54:00 INFO: Activating scheduled preset Sunset transition=False
oct 19 17:54:00 blackbox-ng vdu_controls.desktop[44497]: 17:54:00 INFO: Restored Sunset, elapsed: 0.56 seconds 1 VCP-changes
oct 19 18:11:56 blackbox-ng vdu_controls.desktop[44497]: qt.qpa.wayland: Creating a fake screen in order for Qt not to crash
oct 19 18:12:01 blackbox-ng ddcutil-service[17470]: Poll signal event - dpms changed to awake 1 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 19 18:12:01 blackbox-ng vdu_controls.desktop[44497]: 18:12:01 INFO: Received display_change D-Bus signal message.arguments()=['AP///////wAQrG/QTFFDMCUZAQSlNx94PkRVqVVNnSYPUFSlSwCzANEAcU+pQIGAd4ABAQEBVl4AoKCgKVAwIDUAKTchAAAaAAAA/wBZS0ZXUDU5OTBDUUwKAAAA/ABERUxMIFUyNTE1SAogAAAA/QA4Vh5xHgEKICAgICAgAUE=', 0, 0] id(self)=138257661195712
oct 19 18:12:01 blackbox-ng vdu_controls.desktop[44497]: 18:12:01 INFO: Connected VDUs event DdcEventType.DPMS_AWAKE flags=0 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 19 18:12:01 blackbox-ng vdu_controls.desktop[44497]: 18:12:01 INFO: Refresh commences - acquired application_lock external_event=True
oct 19 18:12:01 blackbox-ng vdu_controls.desktop[44497]: 18:12:01 INFO: Found intialization-preset for DELL_U2515H_YKFWP5990CQL
oct 19 18:12:02 blackbox-ng vdu_controls.desktop[44497]: 18:12:02 INFO: Restored DELL U2515H YKFWP5990CQL, elapsed: 0.56 seconds 1 VCP-changes
oct 19 18:12:02 blackbox-ng vdu_controls.desktop[44497]: 18:12:02 INFO: Restored initialization-preset DELL U2515H YKFWP5990CQL

[digitaltrails]

A few thoughts/questions:

1. It appears Sunny was successfully restored at 17:54:00.
2. If the monitor was off at 17:54:00, I would have expected the restore to error and periodically retry. It's possible this VDU is responding when it is off, some VDU's appear to do that, but they are not actually responding, I would need to add code to cope with that.
3. Does the initialization-preset DELL U2515H YKFWP5990CQL include setting the brightness? The DELL U2515H YKFWP5990CQL restore is triggered by the DPMS event when the monitor comes back online.
4. I had recently add initialization-presets as a replacement for failed monitor NVRAM, or to restore settings not held in NVRAM. I'm curious as to why you might need them?
5. I would have thought the refresh at 18:12:01 would have also restored Sunny, but maybe not if the number of monitors did not change - that might be something I need to fix.
6. KDE6 onward also alters/restores brightness when the desktop is unlocked, it also dims the monitors under some circumstances. There's a notice at the top of the vdu_controls README.MD concerning KDE6. I'm not sure the note covers every way KDE might alter brightness.

[jpbaril]

For the "initialization-preset", well I really don't understand what it does. I added it because in a recent version I was proposed to create it and I thought that maybe it would help with my issue. So, I understand that I should delete it. I don't use KDE, I use Gnome.

[digitaltrails]

Yes, delete it. If the initialization-preset includes a brightness, it will be overriding the scheduled preset whenever the monitor powers-up (and maybe also on wakeup for some monitors). The initialization-preset is intended to help with VDU's that have broken NVRAM and can't save their own settings - a Preset that gets triggered when the monitor powers up.

From your log it looks like vdu_controls "thinks" it successfully already restored Sunset at 17:54. If the monitor was actually not on at that time, that would probably mean the monitor was still accepting, but not applying commands. For my own monitors, if they were off at 17:54, there would be an error and vdu_controls would keep trying until eventually succeeding at 18:12:01.

So it looks like I might need to add some code to handle such a case. The problem is that not knowing whether Sunset has been properly restored means vdu_controls may keep restoring it each time the monitor wakes, and this may tread on any manual changes the user makes in between the sleeps.

[digitaltrails]

Could we sample your logs now that the _initializationpreset has been removed. Perhaps turn on the debugging setting to get more info.

It's quite difficult to understand how a set_vcp can succeed if the monitor is off. Part of the process of restoring a Preset is to perform get_vcp calls to see if it has set all the required values have been met. The restoration should error if the monitor setting does not stick. But if the monitor is behaving badly, I guess anything is possible.

I may have to add a special option, 'hard-dpms', that would treat a DPMS event as requiring a total reconfiguration - which is what happens when more monitors are hot-plugged. But this may not work if I'm misunderstanding the problem.

[jpbaril]

Logs since late last night from the moment I activated debug setting.

oct 20 00:20:38 blackbox-ng ddcutil-service[17470]: Poll signal event - dpms changed to awake 1 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 20 00:20:38 blackbox-ng vdu_controls.desktop[44497]: 00:20:38 INFO: Received display_change D-Bus signal message.arguments()=['AP///////wAQrG/QTFFDMCUZAQSlNx94PkRVqVVNnSYPUFSlSwCzANEAcU+pQIGAd4ABAQEBVl4AoKCgKVAwIDUAKTchAAAaAAAA/wBZS0ZXUDU5OTBDUUwKAAAA/ABERUxMIFUyNTE1SAogAAAA/QA4Vh5xHgEKICAgICAgAUE=', 0, 0] id(self)=138257661195712
oct 20 00:20:38 blackbox-ng vdu_controls.desktop[44497]: 00:20:38 INFO: Connected VDUs event DdcEventType.DPMS_AWAKE flags=0 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 20 00:20:38 blackbox-ng vdu_controls.desktop[44497]: 00:20:38 INFO: Refresh commences - acquired application_lock external_event=True
oct 20 00:28:34 blackbox-ng vdu_controls.desktop[44497]: qt.qpa.wayland: Wayland does not support QWindow::requestActivate()
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 INFO: Wrote config to /home/jpbaril/.config/vdu_controls/vdu_controls.conf
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 INFO: Reloading config: /home/jpbaril/.config/vdu_controls/vdu_controls.conf
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 INFO: Using config file '/home/jpbaril/.config/vdu_controls/vdu_controls.conf'
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 INFO: Reconfiguring due to settings change.
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 INFO: Configuring application (reconfiguring=True)...
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 DEBUG: configure: try to obtain application_configuration_lock
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 DEBUG: Holding application_configuration_lock
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 INFO: PresetTransitionWorker stopped on request
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 DEBUG: Enabled callback for VDU-connectivity-change D-Bus signals
oct 20 00:28:45 blackbox-ng ddcutil-service[17470]: Property ServiceEmitSignals is deprecated, please use ServiceEmitConnectivitySignals
oct 20 00:28:45 blackbox-ng ddcutil-service[17470]: ServiceEmitConnectivitySignals set property to enabled
oct 20 00:28:45 blackbox-ng ddcutil-service[17470]: ServiceEmitConnectivitySignals ddcutil-service polling every 30 seconds
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 INFO: ddcutil version (1, 4, 1) (dynamic-sleep=False) - interface 1.0.11 (D-Bus ddcutil-service - libddcutil)
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 DEBUG: Detecting connected monitors, looping detection until it stabilises.
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 DEBUG: checking possible IDs for display 1
oct 20 00:28:45 blackbox-ng vdu_controls.desktop[44497]: 00:28:45 DEBUG: Unique key for vdu_number='1' manufacturer='DEL' is (model_name='DELL_U2515H' main_id='YKFWP5990CQL')
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: checking possible IDs for display 1
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Unique key for vdu_number='1' manufacturer='DEL' is (model_name='DELL_U2515H' main_id='YKFWP5990CQL')
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Number of detected monitors is stable at 1 (loop=2)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Initializing controls for vdu_number='1' vdu_model_name='DELL_U2515H' self.vdu_stable_id='DELL_U2515H_YKFWP5990CQL'
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: checking for config file '/home/jpbaril/.config/vdu_controls/DELL_U2515H_YKFWP5990CQL.conf'
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Using config file '/home/jpbaril/.config/vdu_controls/DELL_U2515H_YKFWP5990CQL.conf'
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [metadata] version = 2.1.0
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [metadata] timestamp = 2024-10-10 21:20:08.186584-04:00
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] brightness = yes
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] contrast = yes
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] audio-volume = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] audio-mute = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] audio-treble = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] audio-bass = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] audio-mic-volume = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] input-source = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] power-mode = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] osd-language = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] color-preset = no
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] color-temperature = yes
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [vdu-controls-widgets] enable-vcp-codes =
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [ddcutil-parameters] sleep-multiplier = 0.0
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [ddcutil-parameters] ddcutil-extra-args =
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: config: DELL_U2515H_YKFWP5990CQL.conf [ddcutil-capabilities] capabilities-override = Model: U2515H
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: MCCS version: 2.1
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: Commands:
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Op Code: 01 (VCP Request)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Op Code: 02 (VCP Response)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Op Code: 03 (VCP Set)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Op Code: 07 (Timing Request)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Op Code: 0C (Save Settings)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Op Code: E3 (Capabilities Reply)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Op Code: F3 (Capabilities Request)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: VCP Features:
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 02 (New control value)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 04 (Restore factory defaults)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 05 (Restore factory brightness/contrast defaults)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 08 (Restore color defaults)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 10 (Brightness)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 12 (Contrast)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 14 (Select color preset)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values:
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          04: 5000 K
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          0b: User 1
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          05: 6500 K
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          06: 7500 K
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          08: 9300 K
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          09: 10000 K
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          0c: User 2
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 16 (Video gain: Red)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 18 (Video gain: Green)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 1A (Video gain: Blue)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 52 (Active control)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: 60 (Input Source)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values:
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          0f: DisplayPort-1
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          10: DisplayPort-2
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          11: HDMI-1
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          12: HDMI-2
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: AA (Screen Orientation)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values:
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          01: 0 degrees
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          02: 90 degrees
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          04: 270 degrees
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: AC (Horizontal frequency)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: AE (Vertical frequency)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: B2 (Flat panel sub-pixel layout)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: B6 (Display technology type)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: C6 (Application enable key)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: C8 (Display controller type)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: C9 (Display firmware level)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: D6 (Power mode)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values:
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          01: DPM: On,  DPMS: Off
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          04: DPM: Off, DPMS: Off
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          05: Write only value to turn off display
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: DC (Display Mode)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values:
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          00: Standard/Default mode
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          02: Mixed
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          03: Movie
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:          05: Games
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: DF (VCP Version)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: E0 (Manufacturer specific feature)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: E1 (Manufacturer specific feature)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: E2 (Manufacturer specific feature)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values: 00 01 02 04 14 19 0C 0D 0F 10 11 13 (interpretation unavailable)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: F0 (Manufacturer specific feature)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values: 00 08 (interpretation unavailable)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: F1 (Manufacturer specific feature)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:       Values: 01 02 (interpretation unavailable)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: F2 (Manufacturer specific feature)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]:    Feature: FD (Manufacturer specific feature)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Removed DELL_U2515H_YKFWP5990CQL audio-volume - not supported by VDU
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Removed DELL_U2515H_YKFWP5990CQL audio-mute - not supported by VDU
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Removed DELL_U2515H_YKFWP5990CQL audio-treble - not supported by VDU
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Removed DELL_U2515H_YKFWP5990CQL audio-bass - not supported by VDU
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Removed DELL_U2515H_YKFWP5990CQL audio-mic-volume - not supported by VDU
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Removed DELL_U2515H_YKFWP5990CQL osd-language - not supported by VDU
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Removed DELL_U2515H_YKFWP5990CQL color-temperature - not supported by VDU
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Reading preset file '/home/jpbaril/.config/vdu_controls/Preset_Sunset.conf'
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Reading preset file '/home/jpbaril/.config/vdu_controls/Preset_Morning.conf'
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Reading preset file '/home/jpbaril/.config/vdu_controls/Preset_Evening.conf'
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: Reading preset file '/home/jpbaril/.config/vdu_controls/Preset_Winter_sun_zenith.conf'
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG:  hint_height=221 available_height=952 self.minimumHeight()=241
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: SingletonDialog exists SettingsEditor True
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 DEBUG: configure: released application_configuration_lock
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Scheduling presets reconfiguring=True
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Scheduled preset 'Morning' for 2024-10-20 07:26:47.655261-04:00 in 418 minutes SolarElevationKey(direction='eastern-sky', elevation=1)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Scheduled preset 'Winter sun zenith' for 2024-10-20 09:37:47.655261-04:00 in 549 minutes SolarElevationKey(direction='eastern-sky', elevation=21)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Scheduled preset 'Sunset' for 2024-10-20 17:51:47.655261-04:00 in 1043 minutes SolarElevationKey(direction='western-sky', elevation=0)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Scheduled preset 'Evening' for 2024-10-20 18:49:47.655261-04:00 in 1101 minutes SolarElevationKey(direction='western-sky', elevation=-10)
oct 20 00:28:47 blackbox-ng vdu_controls.desktop[44497]: 00:28:47 INFO: Completed configuring application
oct 20 00:29:18 blackbox-ng ddcutil-service[17470]: Poll signal event - dpms changed to asleep 1 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 20 00:29:18 blackbox-ng vdu_controls.desktop[44497]: 00:29:18 INFO: Received display_change D-Bus signal message.arguments()=['AP///////wAQrG/QTFFDMCUZAQSlNx94PkRVqVVNnSYPUFSlSwCzANEAcU+pQIGAd4ABAQEBVl4AoKCgKVAwIDUAKTchAAAaAAAA/wBZS0ZXUDU5OTBDUUwKAAAA/ABERUxMIFUyNTE1SAogAAAA/QA4Vh5xHgEKICAgICAgAUE=', 1, 0] id(self)=138257481727248
oct 20 00:29:18 blackbox-ng vdu_controls.desktop[44497]: 00:29:18 INFO: Connected VDUs event DdcEventType.DPMS_ASLEEP flags=0 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 INFO: Activating scheduled preset Morning transition=False
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 DEBUG: restore_preset: try to obtain application_configuration_lock
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 DEBUG: restore_preset: holding application_configuration_lock
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 DEBUG: Reading preset file '/home/jpbaril/.config/vdu_controls/Preset_Morning.conf'
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 DEBUG: WorkerThread: init PresetTransitionWorker from thread_pid()=44497
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 DEBUG: TransitionWorker: init preset.name='Morning' immediately=True
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 DEBUG: restore_preset: released application_configuration_lock
oct 20 07:26:47 blackbox-ng vdu_controls.desktop[44497]: 07:26:47 DEBUG: WorkerThread: class_name='PresetTransitionWorker' running in thread_pid()=134208 <bound method PresetTransitionWorker._perform_transition of <__main__.PresetTransitionWorker object at 0x7dbe998b4b00>>
oct 20 07:26:48 blackbox-ng vdu_controls.desktop[44497]: 07:26:48 DEBUG: set_vcp: vdu_number='1' vcp_code='10' new_value=40
oct 20 07:26:48 blackbox-ng vdu_controls.desktop[44497]: 07:26:48 DEBUG: set_vcp signals vcp_value_changed: DELL_U2515H_YKFWP5990CQL vcp_code='10' 40 VcpOrigin.TRANSIENT
oct 20 07:26:48 blackbox-ng vdu_controls.desktop[44497]: 07:26:48 DEBUG: SingletonDialog exists AboutDialog False
oct 20 07:26:48 blackbox-ng vdu_controls.desktop[44497]: 07:26:48 DEBUG: About dialog - no refresh - not visible
oct 20 07:26:48 blackbox-ng vdu_controls.desktop[44497]: 07:26:48 DEBUG: respond vdu_stable_id='DELL_U2515H_YKFWP5990CQL' vcp_code='10' value=40 VcpOrigin.TRANSIENT
oct 20 07:26:48 blackbox-ng vdu_controls.desktop[44497]: 07:26:48 INFO: Restored Morning, elapsed: 0.96 seconds 1 VCP-changes
oct 20 07:26:48 blackbox-ng vdu_controls.desktop[44497]: 07:26:48 DEBUG: WorkerThread: class_name='PresetTransitionWorker' terminating thread_pid()=134208
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 INFO: Activating scheduled preset Winter sun zenith transition=False
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: restore_preset: try to obtain application_configuration_lock
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: restore_preset: holding application_configuration_lock
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: Reading preset file '/home/jpbaril/.config/vdu_controls/Preset_Winter_sun_zenith.conf'
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: WorkerThread: init PresetTransitionWorker from thread_pid()=44497
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: TransitionWorker: init preset.name='Winter sun zenith' immediately=True
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: restore_preset: released application_configuration_lock
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: WorkerThread: class_name='PresetTransitionWorker' running in thread_pid()=137946 <bound method PresetTransitionWorker._perform_transition of <__main__.PresetTransitionWorker object at 0x7dbe998b4f80>>
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: set_vcp: vdu_number='1' vcp_code='10' new_value=100
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: set_vcp signals vcp_value_changed: DELL_U2515H_YKFWP5990CQL vcp_code='10' 100 VcpOrigin.TRANSIENT
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: SingletonDialog exists AboutDialog False
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: About dialog - no refresh - not visible
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: respond vdu_stable_id='DELL_U2515H_YKFWP5990CQL' vcp_code='10' value=100 VcpOrigin.TRANSIENT
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 INFO: Restored Winter sun zenith, elapsed: 0.56 seconds 1 VCP-changes
oct 20 09:37:47 blackbox-ng vdu_controls.desktop[44497]: 09:37:47 DEBUG: WorkerThread: class_name='PresetTransitionWorker' terminating thread_pid()=137946
oct 20 10:41:44 blackbox-ng vdu_controls.desktop[44497]: qt.qpa.wayland: Creating a fake screen in order for Qt not to crash
oct 20 10:42:07 blackbox-ng ddcutil-service[17470]: Poll signal event - dpms changed to awake 1 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 20 10:42:07 blackbox-ng vdu_controls.desktop[44497]: 10:42:07 INFO: Received display_change D-Bus signal message.arguments()=['AP///////wAQrG/QTFFDMCUZAQSlNx94PkRVqVVNnSYPUFSlSwCzANEAcU+pQIGAd4ABAQEBVl4AoKCgKVAwIDUAKTchAAAaAAAA/wBZS0ZXUDU5OTBDUUwKAAAA/ABERUxMIFUyNTE1SAogAAAA/QA4Vh5xHgEKICAgICAgAUE=', 0, 0] id(self)=138257481727248
oct 20 10:42:07 blackbox-ng vdu_controls.desktop[44497]: 10:42:07 INFO: Connected VDUs event DdcEventType.DPMS_AWAKE flags=0 AP///////wAQrG/QTFFDMCUZAQSlNx...
oct 20 10:42:07 blackbox-ng vdu_controls.desktop[44497]: 10:42:07 DEBUG: WorkerThread: init WorkerThread from thread_pid()=44497
oct 20 10:42:07 blackbox-ng vdu_controls.desktop[44497]: 10:42:07 DEBUG: WorkerThread: class_name='WorkerThread' running in thread_pid()=139972 <function VduAppController.start_refresh.<locals>.update_from_vdu at 0x7dbe94157ec0>
oct 20 10:42:07 blackbox-ng vdu_controls.desktop[44497]: 10:42:07 INFO: Refresh commences - acquired application_lock external_event=True
oct 20 10:42:07 blackbox-ng vdu_controls.desktop[44497]: 10:42:07 DEBUG: checking possible IDs for display 1
oct 20 10:42:07 blackbox-ng vdu_controls.desktop[44497]: 10:42:07 DEBUG: Unique key for vdu_number='1' manufacturer='DEL' is (model_name='DELL_U2515H' main_id='YKFWP5990CQL')
oct 20 10:42:08 blackbox-ng vdu_controls.desktop[44497]: 10:42:08 DEBUG: WorkerThread: class_name='WorkerThread' terminating thread_pid()=139972
oct 20 10:42:08 blackbox-ng vdu_controls.desktop[44497]: 10:42:08 DEBUG: Refresh - update UI view external_event=True
oct 20 10:42:43 blackbox-ng vdu_controls.desktop[44497]: 10:42:43 DEBUG: SingletonDialog exists PresetsDialog True
oct 20 10:42:43 blackbox-ng vdu_controls.desktop[44497]: 10:42:43 DEBUG: SingletonDialog show existing PresetsDialog
oct 20 10:42:43 blackbox-ng vdu_controls.desktop[44497]: qt.qpa.wayland: Wayland does not support QWindow::requestActivate()

I just logged in for the first time this morning few minutes ago (10:42) and the correct setting did apply. Looks like the combination of no initialization_preset + ddcutil-service might make it work as expected in the end. So, maybe there is no bug and no need to change the code. I'll continue to monitor my... monitor and report back.