Bug 51499

Summary: [SNB regression] Some modes can’t work normally on DVI port
Product: DRI Reporter: Du Yan <yanx.du>
Component: DRM/IntelAssignee: Rodrigo Vivi <rodrigo.vivi>
Status: CLOSED FIXED QA Contact:
Severity: normal    
Priority: medium CC: ben, chris, daniel, guang.a.yang, jbarnes, yi.sun
Version: XOrg git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Du Yan 2012-06-27 23:06:05 UTC 
System Environment:
--------------------------
Platform: Sandybridge
Kernel: (drm-intel-testing)af7c3e1256db0f0526f6176e68a14ddbe96fab63
Some additional commit info:
Merge: ff049b6 d6f24d0
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jun 21 10:17:52 2012 +0200


Bug detailed description:
-------------------------
Running testdisplay –a on DVI port
The following modes can’t light up normally:

1680x1050 60 1680 1728 1760 1840 1050 1053 1059 1080 0x9 0x40 119000
1680x945 60 1680 1784 1960 2240 945 946 949 978 0x6 0x0 131481
1400x1050 60 1400 1488 1632 1864 1050 1053 1057 1089 0x6 0x40 121750
1400x1050 60 1400 1448 1480 1560 1050 1053 1057 1080 0x9 0x40 101000
1600x900 60 1600 1696 1864 2128 900 901 904 932 0x6 0x0 118963
1440x900 75 1440 1536 1688 1936 900 903 909 942 0x6 0x40 136750
1440x900 60 1440 1520 1672 1904 900 903 909 934 0x6 0x40 106500
1440x900 60 1440 1488 1520 1600 900 903 909 926 0x9 0x40 88750
1366x768 60 1366 1439 1583 1800 768 769 772 795 0x6 0x0 85885
1360x768 60 1360 1424 1536 1792 768 771 777 795 0x5 0x40 85500
Comment 1 Daniel Vetter 2012-07-03 01:26:02 UTC 
Can you please also test whether this issue here goes away with the combined revert patch from bug #51490?

https://bugs.freedesktop.org/attachment.cgi?id=63565
Comment 2 Daniel Vetter 2012-07-03 01:26:48 UTC 
Tentatively assigning to Rodrigo under the assumption that the revert fixes things.
Comment 3 Du Yan 2012-07-03 19:35:14 UTC 
(In reply to comment #1)
> Can you please also test whether this issue here goes away with the combined
> revert patch from bug #51490?
> 
> https://bugs.freedesktop.org/attachment.cgi?id=63565

Test with the patch, all the modes in supported list can light up normally.
Comment 4 shui yangwei 2012-08-28 06:12:10 UTC 
Kernel: (drm-intel-testing)ef6113ad0f406db4fbe2bcf3359dd938a6046d75

All the modes in supported list can light up normally on SNB.
Comment 5 Chris Wilson 2012-08-28 07:20:01 UTC 
Accept as fixed until proven otherwise.

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