Sorry for cross-posting, but still looking for a solution.

Running debian/sid on a Thinkpad E460 I have found a collection of (presumably related) problems since upgrading to kernel 5.x Nothing like this has ever occurred with earlier kernel versions.

The symptoms are very simple:

On suspend the machine appears to sleep (fans stop, power light begins slow flash) but is unresponsive to keyboard or power buttons. The only way to start it up again appears to be to force a reset.

On hibernate, the machine writes the image to the swap partition correctly, but then instead of the power light flashing rapidly three times and the machine shutting down, the power light continues flashing indefinitely and the machine continues to consume power. I haven't measured the level of power consumption very precisely but overnight a full battery was completely run down. If I force a reset, the machine then resumes correctly from the image it wrote.

I also tried rtcwake, and with suspend to RAM and the machine did not wake as expected.

I also note that when I do a shutdown, the kernel runs through the full shutdown procedure, but the computer does not power off. Again indicating a failure to communicate with the BIOS.

Following suggestions made elsewhere I upgraded the BIOS to a very recent version. Initially this made no difference, but then for a brief period all seemed well. Until I did a reboot, and now things are back to where they were.

Can anyone offer any suggestions?

Thanks!

Hello,

Have you solved your issue? I'm running into the same problem after my upgrade from Debian 10 to Debian 11 with a 5.10 kernel,
no way to poweroff or to suspend the laptop anymore.

Thanks

No I still have the same problem. Currently at kernel 5.10.0-4

But I have a work-around though which is to hibernate the machine each time I boot it. When it resumes, everything goes OK until the next reboot. The trick is never to reboot - just hibernate.

Tweaking the system to get it usable, I have disabled the trackpad (I don't know how),
and it is not detected anymore :-( I think I'm gonna stop for today !

Thanks