Bug 85641 - [SNB/BSW]DP monitor unable to light up after rotation and hot plug
Summary: [SNB/BSW]DP monitor unable to light up after rotation and hot plug
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-10-30 09:23 UTC by Guo Jinxian
Modified: 2017-07-24 22:50 UTC (History)
3 users (show)

See Also:
i915 platform: BSW/CHT, SNB
i915 features: display/Other

Attachments
dmesg (118.44 KB, text/plain)
2014-10-30 09:23 UTC, Guo Jinxian 		no flags Details
run xrandr --verbose after unplug DP monitor (4.67 KB, text/plain)
2015-01-06 02:10 UTC, Ding Heng 		no flags Details
run xrandr --verbose before unplug DP monitor (11.59 KB, text/plain)
2015-01-06 02:11 UTC, Ding Heng 		no flags Details
View All

Description Guo Jinxian 2014-10-30 09:23:42 UTC 
Created attachment 108680 [details]
dmesg

==System Environment==
--------------------------
Regression: No,
The test always fails

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-nightly: bd21cf795cf5dc278f1451d0f7a597cb1d13c2ba(fails)
    drm-intel-nightly: 2014y-10m-29d-08h-35m-03s UTC integration manifest
origin/drm-intel-next-queued: 421d82916774361a4840018fc3ab3a15751c3ea6(fails)
    drm/i915: use intel_fb_obj() macros to assign gem objects
origin/drm-intel-fixes: b2a9601c587dbc5536546aa54009d1130adedd72(fails)
    drm/i915: Ignore VBT backlight check on Macbook 2, 1

==Bug detailed description==
DP monitor unable to light up after rotation and hot plug. If hot plug without rotation, this bug unable to reproduce.

==Reproduce steps==
---------------------------- 
1. Boot the device only eDP plugged.
2. Connect DP monitor
3. xinit &
4. xrandr --output DP1 --rotation left
5. Unplugged then plugged DP monitor, the monitor unable to light up
Comment 1 Jeff Zheng 2014-12-30 08:09:59 UTC 
Tested on Sandybridge with drm-intel-testing-2014-12-19 commit 4fa23142a15526f4a4b5df61f26eacdd558a849a and saw the same issue.
Comment 2 Chris Wilson 2014-12-30 20:09:33 UTC 
An Xorg.0.log would help here as well.
Comment 3 Chris Wilson 2014-12-31 10:45:04 UTC 
Along with xrandr --verbose before/after step 5.
Comment 4 Ding Heng 2015-01-06 02:10:59 UTC 
Created attachment 111801 [details]
run xrandr --verbose after unplug DP monitor
Comment 5 Ding Heng 2015-01-06 02:11:48 UTC 
Created attachment 111802 [details]
run xrandr --verbose before unplug DP monitor
Comment 7 Jani Nikula 2016-01-14 09:09:21 UTC 
Presumed fixed by

commit d14e7b6d1d8747826cb900db852351c550e00fdd
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date:   Thu Aug 20 19:37:29 2015 +0300

    drm/i915: Check DP link status on long hpd too

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