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.
