Bug#1081546: new "GPU HANG: ecode 12:1:85dffdfb, in Renderer" regression in i915 driver since 6.10 kernel upgrade

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From	Antoine Beaupré <anarcat@debian.org>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1081546: new "GPU HANG: ecode 12:1:85dffdfb, in Renderer" regression in i915 driver since 6.10 kernel upgrade
Date	Thu, 12 Sep 2024 20:40:01 +0200
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Cross-posted to 2 groups.

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The same fellow DD who suggested filing this bug helpfully found what
seems to be a similar issue:

https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/7549

... except that bug report is much older, and seems to apply to 5.x
kernels. I didn't have that issue back then, nor in 6.9, so I don't
think it's the same issue (nor is it the same symptoms).

Digging in that issue tracker, however, i do find a bunch of somewhat
similar regressions:

https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11797
https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11899
https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/11975

I'll also add some more data to back up my claim this is a new
regression from the upgrade:

anarcat@angela:~$ sudo grep -c GPU\ HANG /var/log/kern.log*
/var/log/kern.log:7
/var/log/kern.log.1:0
/var/log/kern.log.2.gz:0
/var/log/kern.log.3.gz:0
/var/log/kern.log.4.gz:0
anarcat@angela:~$ ls -al /var/log/kern.log*
-rw-r----- 1 root adm 2 082 950 2024-09-12 14:30 /var/log/kern.log
-rw-r----- 1 root adm 3 420 621 2024-09-10 09:54 /var/log/kern.log.1
-rw-r----- 1 root adm   285 294 2024-09-03 09:21 /var/log/kern.log.2.gz
-rw-r----- 1 root adm   386 756 2024-08-26 08:53 /var/log/kern.log.3.gz
-rw-r----- 1 root adm   248 500 2024-08-18 00:00 /var/log/kern.log.4.gz

ie. 7 hangs in the `kern.log` file, which started two days ago, and none
in the other files, going back a month.

Interestingly, the kernel was upgraded early after the kern.log.1
rotation:

Start-Date: 2024-09-04  09:30:57
Commandline: apt upgrade
Requested-By: anarcat (1000)
Install: linux-kbuild-6.10.6+bpo:amd64 (6.10.6-1~bpo12+1, automatic), linux-image-6.10.6+bpo-amd64:amd64 (6.10.6-1~bpo12+1, automatic), linux-headers-6.10.6+bpo-amd64:amd64 (6.10.6-1~bpo12+1, automatic), linux-headers-6.10.6+bpo-common:amd64 (6.10.6-1~bpo12+1, automatic)
Upgrade: linux-cpupower:amd64 (6.9.7-1~bpo12+1, 6.10.6-1~bpo12+1), linux-headers-amd64:amd64 (6.9.7-1~bpo12+1, 6.10.6-1~bpo12+1), dh-debputy:amd64 (0.1.39~bpo12+1, 0.1.48~bpo12+1), libssl3:amd64 (3.0.14-1~deb12u1, 3.0.14-1~deb12u2), linux-image-amd64:amd64 (6.9.7-1~bpo12+1, 6.10.6-1~bpo12+1), tailspin:amd64 (2.0.0+dfsg-1, 3.0.2+dfsg-1), libssl-dev:amd64 (3.0.14-1~deb12u1, 3.0.14-1~deb12u2), python3-lsprotocol:amd64 (2023.0.0-1, 2023.0.1-1~bpo12+1), libcpupower1:amd64 (6.9.7-1~bpo12+1, 6.10.6-1~bpo12+1), firefox-esr:amd64 (115.14.0esr-1~deb12u1, 115.15.0esr-1~deb12u1), openssl:amd64 (3.0.14-1~deb12u1, 3.0.14-1~deb12u2), linux-libc-dev:amd64 (6.9.7-1~bpo12+1, 6.10.6-1~bpo12+1)
End-Date: 2024-09-04  09:31:48

... but I booted in the new kernel only 4 days ago:

anarcat@angela:~$ last reboot
reboot   system boot  6.10.6+bpo-amd64 Thu Sep 12 11:12   still running
reboot   system boot  6.10.6+bpo-amd64 Tue Sep 10 09:54   still running
reboot   system boot  6.10.6+bpo-amd64 Mon Sep  9 09:24   still running
reboot   system boot  6.10.6+bpo-amd64 Sun Sep  8 12:36   still running

... so this would probably explain the lack of hangs in the older log.

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Bug#1081546: new "GPU HANG: ecode 12:1:85dffdfb, in Renderer" regression in i915 driver since 6.10 kernel upgrade Antoine Beaupré <anarcat@debian.org> - 2024-09-12 20:40 +0200
  Bug#1081546: new "GPU HANG: ecode 12:1:85dffdfb, in Renderer" regression in i915 driver since 6.10 kernel upgrade Salvatore Bonaccorso <carnil@debian.org> - 2025-03-22 14:50 +0100
    Bug#1081546: new "GPU HANG: ecode 12:1:85dffdfb, in Renderer" regression in i915 driver since 6.10 kernel upgrade Salvatore Bonaccorso <carnil@debian.org> - 2025-04-24 15:10 +0200
      Bug#1081546: new "GPU HANG: ecode 12:1:85dffdfb, in Renderer" regression in i915 driver since 6.10 kernel upgrade Antoine Beaupré <anarcat@debian.org> - 2025-04-24 15:40 +0200
        Bug#1081546: new "GPU HANG: ecode 12:1:85dffdfb, in Renderer" regression in i915 driver since 6.10 kernel upgrade Salvatore Bonaccorso <carnil@debian.org> - 2025-04-24 15:40 +0200

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