Bug 56754

Summary: [Regression v3.7-rc1] DPMS Standby/Suspend don't work on VGA
Product: DRI Reporter: Loïc Yhuel <loic.yhuel>
Component: DRM/IntelAssignee: Jani Nikula <jani.nikula>
Status: CLOSED FIXED QA Contact:
Severity: normal    
Priority: medium CC: ben, chris, daniel, jbarnes
Version: unspecifiedKeywords: regression
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
drm/i915/crt: fix DPMS standby and suspend mode handling none

Description Loïc Yhuel 2012-11-05 01:54:43 UTC 
On a Lenovo E530 (Ivy Bridge), DPMS Standby/Suspend don't work properly on VGA : the display is blanked for one second then is turned back on (too fast to know if it's DPMS or only a black screen), or it even stays on.
DPMS Off works properly.

It's systematic, for example with "xset dpms force standby" or "xset dpms force suspend".

3.7-rc4 doesn't work, 3.6.2 works.

I've bisected, the regression starts with commit b2cabb0e1d205708dab11bd9e1b97fd080537096.
Comment 1 Daniel Vetter 2012-11-05 07:55:38 UTC 
commit b2cabb0e1d205708dab11bd9e1b97fd080537096
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Sun Jul 1 22:42:24 2012 +0200

    drm/i915: convert dpms functions of dvo/sdvo/crt
Comment 2 Jani Nikula 2012-11-05 08:55:23 UTC 
Created attachment 69544 [details] [review]
drm/i915/crt: fix DPMS standby and suspend mode handling

Please try the attached patch, thanks.
Comment 3 Loïc Yhuel 2012-11-05 21:32:04 UTC 
(In reply to comment #2)
> Created attachment 69544 [details] [review] [review]
> drm/i915/crt: fix DPMS standby and suspend mode handling
> 
> Please try the attached patch, thanks.

Great, it fixes the bug !
Comment 4 Daniel Vetter 2012-11-06 09:49:34 UTC 
Fixed merged into drm-intel-fixes

commit 4a8dece21eea0ad6aca442272673d48693cd93b4
Author: Jani Nikula <jani.nikula@intel.com>
Date:   Mon Nov 5 13:51:51 2012 +0200

    drm/i915/crt: fix DPMS standby and suspend mode handling
Comment 5 Jari Tahvanainen 2016-11-03 12:26:15 UTC 
Closing resolved+fixed. Verified by Reporter. CommitDate: Fri Nov 16 2012.

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