Bug 100821 - [dp mst dock] Black external monitor after resume from suspend
Summary: [dp mst dock] Black external monitor after resume from suspend
Status: RESOLVED CODE_FIX
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - Intel) (show other bugs)
Hardware: Intel Linux
: P3 high
Assignee: intel-gfx-bugs@lists.freedesktop.org
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-07-02 19:24 UTC by noga.dany
Modified: 2015-10-13 06:26 UTC (History)
2 users (show)

See Also:
Kernel Version: 4.1.0
Subsystem:
Regression: Yes
Bisected commit-id:

Attachments
dmesg after suspend - resume (244.78 KB, text/plain)
2015-07-02 19:24 UTC, noga.dany 		Details
Add an attachment (proposed patch, testcase, etc.)

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
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