Bug 198563 - Two displayport monitors connected via hub flash black when typing
Summary: Two displayport monitors connected via hub flash black when typing
Status: RESOLVED PATCH_ALREADY_AVAILABLE
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(Other) (show other bugs)
Hardware: Intel Linux
: P1 normal
Assignee: drivers_video-other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-01-23 15:49 UTC by John Hughes
Modified: 2018-01-24 09:26 UTC (History)
0 users

See Also:
Kernel Version: 4.9.65
Subsystem:
Regression: Yes
Bisected commit-id:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Description John Hughes 2018-01-23 15:49:25 UTC 
I have a system with one displayport and two monitors connected via a displayport hub.

All worked well with kernel 4.9.30, but when I upgraded to 4.9.65 the displays would often go black for a second or two.  This seems to happen when typing into a gnome-terminal window.

The problem was first seen with kernels from Debian stretch, but has been seen when using kernels compiled from vanilla.

This is Debian bug https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=886746

I'm currently building a more recent kernel to see if the bug still exists and will try bisecting if it does.
Comment 1 John Hughes 2018-01-24 09:25:38 UTC 
Well it seems that the bug is fixed in 4.9.77 so I'm not going to bother bisecting.

If anyone needs more information or testing please contact me by mail.
Note You need to log in before you can comment on or make changes to this bug.