Created attachment 278823 [details] lspci I am experiencing a sporadic hang of the system which occurs about 50% of the time the screen is turned off in Wayland or X (eg. with xset dpms force off). I experienced a similar issue in Windows 10 on this laptop (BSOD with WHEA UNCORRECTABLE ERROR), albeit much less often, when turning the screen on and off repeatedly there. The release notes for the latest Intel graphics driver package on Dell's site mentions the problem, and installing it indeed fixed it in Windows 10. https://www.dell.com/support/home/en/en/indhs1/drivers/driversdetails?driverId=GG5FR&osCode=WT64A&productCode= I am getting the hang in Linux in every kernel version I've tried from 4.15.0 to 4.19.0rc5.
Setting intel_idle.max_cstate=1 works as a crude workaround.
Created attachment 278825 [details] cpuinfo
Thanks Matthew for the information. @Rui, @Len, we'll try to contact the graphic team for detail of the fix for windows.
I actually had to use intel_idle.max_cstate=0 to stop the hangs completely. When the hang happens on Linux, the LED sometimes displays the CPU error beep code. (two ambers, one white)
A better workaround is to use i915.enable_dc=0
I'll file a bug on freedesktop to loop i915 people for comment.
Have an issue with Dell latitude 5590 like that: https://www.dell.com/community/Latitude/Latitude-5590-bios-gt-1-8-suspend-issue-ubuntu-led-error-pattern/td-p/7326963 i915.enable_dc=0 works for me, but now FAN is not stopping even CPU is not being hot. Is there any solutions of that issue?
FYI i915 developers won't look at this bugzilla.
Please file i915 issues at the freedesktop.org gitlab https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs