http://bugzilla.opensuse.org/show_bug.cgi?id=1183872 Bug ID: 1183872 Summary: Regression: System hang when connecting HMDI with i915 Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: x86-64 OS: openSUSE Tumbleweed Status: NEW Severity: Normal Priority: P5 - None Component: Kernel Assignee: kernel-bugs@opensuse.org Reporter: milanfix@protonmail.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- Created attachment 847526 --> http://bugzilla.opensuse.org/attachment.cgi?id=847526&action=edit Hardware info This bug doesn't occur on Leap 15.2 but it happens very consistently on Tumbleweed. How to reproduce: 1) Connect an external screen by HDMI *after* turning on the computer Expected behavior: The screen is recognized Actual behavior: Both screen go blank and the system is unusable If the screen is connected before turning on the computer then it will work as expected, but if it's re-plugged it will still hang. This isn't a desktop environment specific issue and it happens even without any X server at all. Speculation: This is most likely a kernel issue, specifically a bug in the i915 driver. If so, it was introduced between Linux 5.3 and 5.11. Things that were tried: i915.enable_psr=0 still, intel_idle.max_cstate=1 and i915.enable_dc=0 where all tried but the bug still occur. Tried to get a dump with kdump but nothing was written in /var/crash. Any tips to debug this issue so it can be narrowed down would be really helpful. I'm currently trying to find a way to test every kernel from 5.3 to 5.11 without having to actually compile them on tumbleweed, so it can, without a doubt confirmed it's a kernel issue and also find the version on which the regression was introduced. -- You are receiving this mail because: You are the assignee for the bug.