http://bugzilla.suse.com/show_bug.cgi?id=1055493 Bug ID: 1055493 Summary: kernel panic after wakeup from STR / on switching terminals / displays after upgrade linux-default-4.4.36-8.1 -> 4.4.49-16, and still happening on 4.4.79-18.26-default Classification: openSUSE Product: openSUSE Distribution Version: Leap 42.2 Hardware: Other OS: Other Status: NEW Severity: Major Priority: P5 - None Component: Kernel Assignee: kernel-maintainers@forge.provo.novell.com Reporter: okurz@suse.com QA Contact: qa-bugs@suse.de CC: sebastian.chlad@suse.com, tiwai@suse.com Depends on: 1029634 Found By: --- Blocker: --- +++ This bug was initially created as a clone of Bug #1029634 +++ ## observation On DELL Latitude E7250 after waking up the system from STR in the docking station and calling `xrandr` to enabled the display connected over DP sometimes the system halts and has a kernel panic. Originally reported as bug #1029634 and thought to be fixed but it still happens sometimes although less than before. ## reproducible So far I do not know a non-statistical way to reproduce so the best way to reproduce it is so far -> Run the following procedure every day until the problem happens :-/ : * system in docking station with internal screen and external DP screen on docking station enabled in openSUSE Leap 42.2 in awesome window manager * work a day * put system to STR in docking station * wait for system to be in STR * close lid * undock * bring computer back home * sometimes switch computer on from home, sometimes not. Switch on, call xrandr and configure only single, internal screen, work, switch off * next day go to work * put computer in docking station * open lid, computer switches on * wait some seconds or not * unlock screen * call xrandr over keyboard shortcut bound to script to call xrandr to enable external screen * observe problem or if not, repeat whole procedure ## expected results last good should be linux 4.4.36, at least I do not recall observing this problem in before the last kernel update, at least not that often. Expected: Obviously the kernel should not crash here. -- You are receiving this mail because: You are on the CC list for the bug.