[Bug 115511] New: Video system crashes sometimes when plugged into dock station on Dell E7450
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Tue Mar 29 20:20:33 UTC 2016
https://bugzilla.kernel.org/show_bug.cgi?id=115511
Bug ID: 115511
Summary: Video system crashes sometimes when plugged into dock
station on Dell E7450
Product: Drivers
Version: 2.5
Kernel Version: 4.4.5
Hardware: x86-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - Intel)
Assignee: intel-gfx-bugs at lists.freedesktop.org
Reporter: slawek at otwiera.cz
CC: intel-gfx-bugs at lists.freedesktop.org
Regression: No
Created attachment 211021
--> https://bugzilla.kernel.org/attachment.cgi?id=211021&action=edit
Previous boot dmesg: journalctl -k -b -1
* Facts
** Video freezes from time to time (randomly) after Dell E7450 being plugged
into docking station with two external FHD displays attached (DP1-1 and DP1-2
in xrandr).
** I've got background shell script running which detects udev change and calls
xrandr to enable two external displays - so this issue might happend after
xrandr command or after plug-event itself (not really able to verify, it will
be difficult to work without it running)
** I was hitting shutdown button after crash, so there might be
shutdown-related events in log (at the end, I've hold it until system halted)
* Guesses
** According to LEDs (not tested with SSH yet) system is responding normally
after video freeze - disk LED blinks from time to time.
** One of external monitors might be already reading „empty signal” (if I
understand correctly, it is no longer reporting that there is no signal, but
instead it acts like there is perfectly black image displayed)
* Attachments
** dmesg log from the crashed boot.
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