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linrunner / TLP

TLP - Optimize Linux Laptop Battery Life
https://linrunner.de/tlp
GNU General Public License v2.0
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Connecting or disconnecting the charger while laptop is sleeping causes it to no longer be able to wake up (Lenovo Ideapad 5 Pro 14ARH7) #741

Closed YoriMirus closed 2 months ago

YoriMirus commented 2 months ago

[x] I've read and accepted the Bug Reporting Howto [x] I've provided all required tlp-stat outputs via Gist (see below)

Describe the bug

When the laptop is sleeping and I plug or unplug the charger, then the laptop has a high chance of no longer being able to wake up.

Expected behavior

Laptop should wake up normally when the lid is opened or a keyboard key is pressed.

To Reproduce

Steps to reproduce the unexpected behavior:

  1. Does the problem occur on battery or AC or both?
    • Both. The change in charging state seems to cause this.
  2. Shell commands entered and their output
    • No commands need to be entered to cause this bug
  3. Full output of tlp-stat via https://gist.github.com/ for all matching cases of 1 (not as file attachment, no screenshots)

https://gist.github.com/YoriMirus/3f0b9b01eb9b3c0d1dc7fc3488d96e4c

Additional context

The mentioned tlp configuration should be the defaults as set by TLP.

This bug does not always happen but occurs pretty often. When this bug occurs, nothing seems to visually change. The laptop starts producing heat, but the power LED still indicates sleep mode. If this bug occurs while disconnecting the charger, the keyboard backlight briefly turns on and then off (for around 100ms).

The issue temporarily goes away by reinstalling tlp, but will come back after the laptop falls asleep a few times.

One strange thing I found though is that setting TLP_ENABLE=0 does not fix this. I need to completely uninstall tlp for this issue to disappear. tlp-stat says that tlp is not running, so I have no idea why tlp would still be causing this even if it's turned off. However, if tlp is disabled (but still installed), when this bug occurs, the fans spin up.

There do not seem to be any errors logged in journalctl when this occurs. The last line in journalctl only mentioned that the laptop successfully fell asleep. Maybe there are errors but they are not logged as the laptop needs to be forcefully shut down in order to be useable again. Kernel also stops listening to the SysRq key, so a safe shutdown seems to be impossible.

linrunner commented 2 months ago

Usually wake-up problems are caused by the kernel. A deactivated TLP really doesn't touch any settings, I think it's just a coincidence.

You can try to find the causal setting by means of the Troubleshooting Guide.

EDIT: If I had to guess, I would start with disabling AHCI Runtime PM completely: 

AHCI_RUNTIME_PM_ON_AC=""
AHCI_RUNTIME_PM_ON_BAT=""

https://linrunner.de/tlp/faq/operation.html#system-freezes-on-wakeup-from-suspend-on-battery

Good luck.

YoriMirus commented 2 months ago

I do not know how, but after reinstalling TLP again, the issue went away. Closing issue.