Bug 111484

Summary: Intel IceLake corruption at top of screen caused by fbc
Product: DRI Reporter: You-Sheng Yang [:vicamo] <vicamo>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: RESOLVED DUPLICATE QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: critical    
Priority: high CC: bugs, intel-gfx-bugs
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard: Triaged, ReadyForDev
i915 platform: ICL i915 features: display/FBC
Bug Depends on: 108085    
Bug Blocks:    
Attachments:
Description Flags
dmesg, v5.3-rc6, drm.debug=0xe
none
glxinfo
none
lspci output
none
proposed patch none

Description You-Sheng Yang [:vicamo] 2019-08-26 03:59:05 UTC 
This is a duplicate to https://bugs.freedesktop.org/show_bug.cgi?id=108085 that happens on IceLake platform as well.

It can be reproduced on linux v5.3-rc6 today, with the reproduce steps listed in bug 108085, but one can easily found a horizontal line of corruption at the top of the screen when logging in from gdm.

Blacklist IceLake as https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=396dd8143bdd94bd1c358a228a631c8c895a1126 did for GeminiLake is a known work-around so far.
Comment 1 You-Sheng Yang [:vicamo] 2019-08-26 04:00:12 UTC 
Created attachment 145160 [details]
dmesg, v5.3-rc6, drm.debug=0xe
Comment 2 You-Sheng Yang [:vicamo] 2019-08-26 04:00:40 UTC 
Created attachment 145161 [details]
glxinfo
Comment 3 You-Sheng Yang [:vicamo] 2019-08-26 04:01:20 UTC 
Created attachment 145162 [details]
lspci output
Comment 4 You-Sheng Yang [:vicamo] 2019-08-26 04:05:34 UTC 
Created attachment 145163 [details]
proposed patch
Comment 5 Jani Saarinen 2019-08-26 05:50:28 UTC 
ICL issue tracked on fdo 103167 and WIP there.
Comment 6 Lakshmi 2019-09-03 09:53:43 UTC 
(In reply to Jani Saarinen from comment #5)
> ICL issue tracked on fdo 103167 and WIP there.

Accordingly, all the above details are set.
Comment 7 Lakshmi 2019-09-10 11:27:13 UTC 
@Maarten, Is this issue related to Bug 111484? Since you investigated Bug 111484 any suggestions here?
Comment 8 Jani Saarinen 2019-09-10 14:04:36 UTC 
You mean Lakshmi if 103167 is same?
Comment 9 Lakshmi 2019-09-11 14:44:04 UTC 
(In reply to Jani Saarinen from comment #8)
> You mean Lakshmi if 103167 is same?

Sorry, yes it's Bug 103167 .
Comment 10 Maarten Lankhorst 2019-09-13 13:26:44 UTC 
Likely identical, especially if disabling fbc from command line works.
Comment 11 Jani Saarinen 2019-09-13 13:59:55 UTC 
marking this as dup. WIP on that has been already a while to understand cause of it.

*** This bug has been marked as a duplicate of bug 103167 ***
Comment 12 Jani Saarinen 2019-09-13 14:02:29 UTC 
Reporter, please also try as suggested using i915.enable_fbc=0 if issue still exists.
Comment 13 Jani Saarinen 2019-09-13 14:14:22 UTC 
Ah, so suggested workaround using i915.enable_fbc=0 also works?
Comment 14 You-Sheng Yang [:vicamo] 2019-09-14 11:59:48 UTC 
Yes, basically whatever turns off fbc would work. Thank you.
Comment 15 Jani Saarinen 2019-11-01 15:34:32 UTC 
This still WIP

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