Created attachment 305080 [details]
lshw (Dell Latitude 7490 - 081C)

My Dell Latitude 7490 sometimes completely freezes. It must be power cycled to reboot. CTRL-ALT-DELETE or ALT-PRINT-b do not work.

Workaround:
Set GRUB_CMDLINE_LINUX_DEFAULT kernel parameter in GRUB (and reboot):
  i915.enable_psr=0

Device type: Notebook
Vendor: Dell
Model: Latitude 7490 (081C)
CPU+GPU: i7-8650U (UHD Graphics 620)
OS: Debian-12
Kernel: Linux-6.1.38-4 (stock Debian kernel)
Graphical UI: XOrg running KDE-Plasma-Desktop
lshw output attached


Other users report the same for this notebook model and use i915.enable_psr=0 to workaround it.

-> I guess a hardware specific quirk in the i915 driver might make sense!




I couldn't find any traces of a crash in the logs. Searched "journalctl -a", /var/log/syslog, /sys/fs/pstore and /var/lib/systemd/pstore/ 

List of other users which also came to the conclusion to set i915.enable_psr=0 on their Dell Latitude 7490.

https://forums.debian.net/viewtopic.php?p=773619&sid=d007f731d6419cb4a70a0f2ab27f0b4a#p773619

https://bbs.archlinux.org/viewtopic.php?pid=1902231#p1902231

https://forum.qubes-os.org/t/dell-7490-freezing-after-latest-dom0-upgrade-to-kernel-5-4/2536/6

https://www.reddit.com/r/linuxquestions/comments/k4imsd/freeze_on_kernels_419_because_of_i915_dell/

https://medium.com/@natchanan.th/linux-5-x-random-kernel-panic-workaround-4e063e4d34a7

https://askubuntu.com/a/1448573

https://forums.centos.org/viewtopic.php?t=80176#p336170

https://forums.linuxmint.com/viewtopic.php?p=2278684

Here someone even completely disables the GPU power management with i915.enable_dc=0
But to me it looks like i915.enable_psr=0 is sufficient.
https://paperstack.com/fixing_the_freeze/