Bug 100821

Summary:	[dp mst dock] Black external monitor after resume from suspend
Product:	Drivers	Reporter:	noga.dany
Component:	Video(DRI - Intel)	Assignee:	intel-gfx-bugs (intel-gfx-bugs)
Status:	RESOLVED CODE_FIX
Severity:	high	CC:	intel-gfx-bugs, tiwai
Priority:	P3
Hardware:	Intel
OS:	Linux
See Also:	https://bugzilla.opensuse.org/show_bug.cgi?id=936308 https://bugs.freedesktop.org/show_bug.cgi?id=89589
Kernel Version:	4.1.0	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	dmesg after suspend - resume

Description noga.dany 2015-07-02 19:24:44 UTC

Created attachment 181661 [details]
dmesg after suspend - resume

How to reproduce:
1) Dell Latitude E7450 with i7-5600U (HD Graphics 5500)
2) Notebook in dock station with external monitor connected
3) Everything ok
4) Suspend to ram
5) Resume from suspend
6) External screen connected via DVI is black

Environment:
1) until 3.17 is ok
2) from 3.18 to 4.0 external monitor is black after resume
3) from 4.1 external monitor blinks black every cca minute

Start monitor with xrandr again after resume works.



I am redirected here from report on openSUSE bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=936308

Comment 1 Jani Nikula 2015-10-07 11:06:54 UTC

There's been plenty of DP MST updates upstream lately.

If the problem persists with latest kernels, please file a bug at the freedesktop.org bugzilla [1], referencing this bug. Thank you.

[1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

Comment 2 noga.dany 2015-10-13 06:26:22 UTC

Filled: https://bugs.freedesktop.org/show_bug.cgi?id=92442