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Bug#959232: linux-image-5.5.0-2-amd64: system freeze after suspend-to-ram: potentially IRQ-related issue

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  Bug#959232: linux-image-5.5.0-2-amd64: system freeze after suspend-to-ram: potentially IRQ-related issue Salvatore Bonaccorso <carnil@debian.org> - 2020-09-06 15:00 +0200

#68010 — Bug#959232: linux-image-5.5.0-2-amd64: system freeze after suspend-to-ram: potentially IRQ-related issue

Hi Maximilian,

On Fri, May 01, 2020 at 11:56:00AM +0200, Maximilian Stein wrote:
> Package: src:linux
> Version: 5.5.17-1
> Severity: normal
> 
> Dear maintainer,
> 
> Occasionally my system freezes after waking up from suspend-to-ram.
> More precisely, the KDE lock screen appears, I can type my passphrase,
> but then the screen just stays black leaving me movable mouse. I
> neither can switch to a virtual terminal (Strg+Alt+F1 etc.) nor kill
> the session with SysRq+K. Rebooting with SysRqs still works though.
> 
> Investigating the issues in the kernel logs reveals a message
> indicating a NULL ptr derefererence in the kernel that is related to
> IRQ (see below).
> 
> My device was in suspend-to-ram since yesterday so the attached log
> includes all messages since I opened the laptop lid. It was generated
> using:
> 
>   journalctl -b-1 --dmesg --since today --quiet --no-hostname --grep '^(?!iptables:)'
> 
> Such freezes happen about once a week and since I got the device (so
> it also happened with older kernels).
> 
> The device is a Lenovo X1 Carbon 6th Generation with an Intel
> i7-8650U with up-to-date BIOS running Debian Testing.
> 
> Any help is highly appreciated.

A similar report was done in SuSE https://bugzilla.suse.com/show_bug.cgi?id=1129258

Can you check if hte issue ist still present with a more recent
kernel, ideally test up to 5.8.7-1 in unstable.

If the issue is still present, it might be woth reporting it directly
upstream to the linux-i2c@vger.kernel.org list.

Regards,
Salvatore

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