Bug 91720

Summary: [SKL] display gets black screen for some time
Product: DRI Reporter: Janusz <januszmk6>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED NOTOURBUG QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: SKL i915 features:
Attachments:
Description Flags
dmesg none

Description Janusz 2015-08-21 23:38:25 UTC 
Created attachment 117846 [details]
dmesg

I have connected 2x hdmi full hd + 2560x1440 + 1x DP full hd.
on display with 2560x1440 resolution I constantly get black screens and horizontal strips over the screen. I am sure now that its not problem of cable because I tested it on my external GPU and recently I get black screen on other monitors from time to time but not so often as on 1440p monitor. I also tested windows, it doesnt gets black screens.
This also happens in TTY.
Also, don't know if its luck or not, but when I connected only one monitor, 1440p over DP, I didn't get this problem.  

This is video how it looks like: https://www.youtube.com/watch?v=fB2pJsD9NFQ
Comment 1 Janusz 2015-08-21 23:40:14 UTC 
its gpu from i7 6700k
Comment 2 Janusz 2015-08-22 09:42:58 UTC 
I think I found the problem with this black screens. I have G.Skill Ripjaws 4x4GB 3000MHz, first on this motherboard MSI Z170A M7 there was a problem with memory when I turned on XMP profile to get 3000MHz, system was crashing. When I upgraded uefi on MB, system didn't crashed anymore after turning on XMP mode, but when I turn off XMP now, black screens are not happening anymore. I wrote that it was working on windows, but it was probably with XMP turned off.
Comment 3 Mika Kahola 2015-08-26 10:26:54 UTC 
Are you still experiencing black screen issues or did the turning of XMP off cure the black screen issue?
Comment 4 Janusz 2015-08-26 14:07:01 UTC 
(In reply to Mika Kahola from comment #3)
> Are you still experiencing black screen issues or did the turning of XMP off
> cure the black screen issue?

yes, this problem is only when XMP is turned on.

weird thing is that when I connect my monitor 2560x1440 to DP, its happening more often on other monitor that connection wasn't changed, and on DP monitor it doesn't happen anymore. Also when trying to connect different HDMI cable, it doesnt even get signal without XMP, and does work on the same cable on external GPU.

But that wont be drivers problems, just problems with motherboard.
Comment 5 Mika Kahola 2015-09-07 07:21:57 UTC 
All in all we could close this one as it seems that this is not related to the driver?
Comment 6 Janusz 2015-09-07 07:23:49 UTC 
ok, I am closing it

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