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Graphics card AMD HD 4350/4550 + Debian 12/"Bookworm" + LxQt from source code: Screen continuously turns black and shows different resolutions, all this in an endless loop #2468

Closed ploxmox closed 1 year ago

ploxmox commented 1 year ago

AMD Radeon HD 4350/4550 and Debian 12 (currently stable Debian release):

Once in a while the screen turns black for some seconds, then the LxQt GUI gets displayed in another resolution for a while, then the screen turns black again for some seconds, the the LxQT GUI again gets displayed in another resolution, all this in an endless loop.

Every time before the screen turns black, a message box gets displayed in the lower right corner of the LxQt GUI. This message box displays the following information:

lxqt-config-monitor: Standardbildschirmeistellungen wurden angewendet. Wenn Sie die Bildschirmeinstellungen ändern möchten, verwenden Sie bitte lxqt-config-monitor.

Translated by myself to English:

lxqt-config-monitor: Default screen settings have been applied. If you want to change the screen settings please use lxqt-config-monitor.

These are the screen resolutions that were displayed one after another during one LxQt session which lasted about 15 minutes:

  1. 1024 x 768
  2. 1920 x 1080
  3. 1024 x 768
  4. 1920 x 1080

This behavior can be reduced to the screen only turning black for some seconds once in a while without then changing the screen resolution each time, plus showing lxqt-config-monitor message box once in a while, if one uses an xorg.conf file in /etc/X11: Then the screen resolution keeps to the resolution defined in the xorg.conf file.

The behavior described above occurs after nearly every single login into the LxQt GUI, also after reboots.

I implemented LxQt 1.3.0 on the affected machine by compiling its source files which I checked out from gitlab.com using git. Before the implementation of LxQt 1.3.0 I had deleted the LxQt deb packages for LxQt version 1.2.0 - in this LxQt version the behavior as described above occurred, too.

LxQt version on the affected machine, information copied from within the "About LxQt" box:

LXQt Desktop Toolbox - Technical Info
  LXQt About Version:     1.3.0
  LXQt Version:           1.3.0
  Qt:                     5.15.8
  Build type:             Release
  System Configuration:   /etc/xdg
  Share Directory:        /usr/share/lxqt
  Translations:           /home/xxx/.local/share/lxqt/translations
/usr/local/share/lxqt/translations
/usr/share/lxqt/translations

User Directories
  Xdg Data Home:          /home/xx/.local/share
  Xdg Config Home:        /home/xx/.config
  Xdg Data Dirs:          /home/xxx/.local/share
/usr/local/share
/usr/share
  Xdg Cache Home:         /home/xxx/.cache
  Xdg Runtime Home:       /run/user/1000
  Xdg Autostart Dirs:     /etc/autostart
/etc/xdg/autostart
/usr/share/autostart
  Xdg Autostart Home:     /home/xxx/.config/autostart

Debian version on the affected machine:

xxx@yyy:~$ cat /etc/debian_version 
12.1
xxx@yyy:~$

Running kernel version, currently the only one installed kernel version:

xxx@yyy:~$ uname -a
Linux yyy 6.1.0-11-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.38-4 (2023-08-08) x86_64 GNU/Linux
xxx@yyy:~$

Information about the graphics card in the affected machine:

root@syyy:~# lshw -C video
  *-display                 
       description: VGA compatible controller
       product: RV710 [Radeon HD 4350/4550]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:01:00.0
       logical name: /dev/fb0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom fb
       configuration: depth=32 driver=radeon latency=0 resolution=1920,1080
       resources: irq:25 memory:d0000000-dfffffff memory:fdee0000-fdeeffff ioport:ee00(size=256) memory:c0000-dffff
root@yyy:

Content of the xorg.conf file in /etc/X11:

Section "Monitor"
       Identifier "VGA-0"
       Modeline "1920x1080R" 138.50 1920 1968 2000 2080 1080 1083 1088 1111 +hsync -vsync
       Option "PreferredMode" "1920x1080R"
EndSection

I created the content of the xorg.conf file with the outputs of the commands "xrandr" and "cvt -r ".

Xfce:

The desktop environment Xfce 4.18, i. e. its deb packages, is installed on the affected machine and can be used besides the compiled and implemented LxQt version 1.3.0 from source.

Installed deb packages for GTK on this machine in version 3.24.37.

The behavior as described above does not occur in Xfce on the affected machine. I checked this during several Xfce sessions which each lasted for at least 10 minutes, most of them initialized by a reboot. Only rarely the screen flickers for about a second, that's all. I also wrote this bug report in one of these Xfce sessions.

(L)Ubuntu and other LxQt versions (not) being affected:

The behavior as described above occurred on the same machine in Lubuntu 22.04.3 LTS with each the 6.2.0-26-generic kernel and the 5.15.0-79-generic kernel running, too. According to https://lubuntu.me/jammy-3-released/, LxQt 0.17.0 is part of Lubuntu 22.04.

The behavior did not occur in Lubuntu 20.04 LTS. I curreńtly cannot find out the LxQt version being part of Lubuntu 22.04. LTS

Both Lubuntu 20.04 and 22.04.3 are not installed anymore on the affected machine.

For more details about all this see my thread in the Lubuntu forum at

https://discourse.lubuntu.me/t/graphic-card-amd-radeon-hd-4350-4550-and-lubuntu-22-04-3-screen-constantly-turns-black-for-some-seconds/4490/7

Conclusion:

The cause(s) for the behavior described in this thread must be the respective LxQT version installed as deb packages from the official Debian repositories of Debian 12, the installed deb packages from the official repositories of Lubuntu 22.04, and LxQt version 1.3.0 built from source code, maybe in connection with the 6.* kernel versions running in Debian 12 and Lubuntu 22.04.

lorn10 commented 1 year ago

Hi there, question did your try also a more recent Mesa devel version? I would recommend to test the oibaf PPA if you have Lubuntu installed.

In recent weeks and months there was some (super) heavy code refactoring on the Mesa r600 driver. So I think it would not harm to test a newer Mesa devel release. :wink: I am currently on Mesa 24.0~git2311050600.cd0a01~oibaf~j (git-cd0a015 2023-11-05 jammy-oibaf-ppa) and it works fine on all my Radeon Hardware down to my Radeon HD 2400 XT GPU.

However, this is true for KDE and Kubuntu but I will plan to migrate at least my weakest hardware to LXQT and Lubuntu.

And finnaly, exist there a way to set the renderer in LXQT to OpenGL ES & EGL mode? This is possible in KWin on Kubuntu and I am looking for a similar option in LXQT. This can really help on older hardware and for me it makes Kubuntu usable on my old iMac 5,1 where the normal OGL mode (in conjunction with GLX) seems to be broken.

tsujan commented 1 year ago

This is possible in KWin on Kubuntu

When it's possible in KWin, it's also possible when KWin is used anywhere, whether in KDE or in LXQt. LXQt doesn't do these things; the compositor you use with LXQt does.

I'm converting this to a discussion....