Bug 57305

Summary: [ILK Regression] DP fail to light up after booting
Product: DRI Reporter: shui yangwei <yangweix.shui>
Component: DRM/IntelAssignee: Daniel Vetter <daniel>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: major    
Priority: medium CC: ben, chris, daniel, jbarnes
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Booting with DP , some monitor can't light up none

Description shui yangwei 2012-11-20 07:36:01 UTC 
Created attachment 70295 [details]
Booting with DP , some monitor can't light up

Kernel: (drm-intel-next-queued)29b46977df92852ea9e153361297b8f8c419da92
Some additional commit info:
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date:   Fri Nov 16 11:43:21 2012 +0000

    drm/i915: Remove save/restore of physical HWS_PGA register

Description:
---------------------------
With this kernel, DP can't light up after booting on some monitor.
And there's only one monitor worked correctly. 

Test with earlier kernel, all monitor can light up with DP and work well.

If it's needed to bisect, please let me know.

Good commit:
____________________________
Kernel: (drm-intel-next-queued)3bcedbe5f2a3da65326d99803cac71c1e89bc93f
Some additional commit info:
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Wed Sep 19 13:29:01 2012 -0700
Comment 1 Damien Lespiau 2012-11-27 20:05:06 UTC 
Hi,

Is this by any chance the same bug as #54764, trying to light up the preferred mode that have regressed?
Comment 2 shui yangwei 2012-11-28 07:35:51 UTC 
The Linux Kernel, the operating system core itself
Kernel: (drm-intel-testing)c8b0458435ec4740c9f542a706aebc0e75998211
Some additional commit info:
Merge: 70b12bb 9a30a61
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Fri Nov 23 20:07:48 2012 +0100

Description:
-----------------------

Test with this kernel, this issue can't reproduced.

I think this is a current situation. We can close this bug first, I will pay attention to whether it will come up again afterwards.
Comment 3 Daniel Vetter 2012-11-28 07:46:58 UTC 
Yeah, please reopen if this breaks again.
Comment 4 Elizabeth 2017-10-06 14:47:50 UTC 
Closing old verified.

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