Bug 201547 - [i915] after resume from DPMS, the display is still black. i can operate the system blindly.
Summary: [i915] after resume from DPMS, the display is still black. i can operate the ...
Status: RESOLVED INVALID
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(Other) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-other
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-10-28 04:44 UTC by nanericwang
Modified: 2019-01-22 16:40 UTC (History)
0 users

See Also:
Kernel Version: 4.19
Subsystem:
Regression: No
Bisected commit-id:

Attachments
dmesg (49.48 KB, text/plain)
2018-10-28 04:44 UTC, nanericwang 		Details
xorg.conf (1.48 KB, text/plain)
2018-10-28 04:45 UTC, nanericwang 		Details
xorg.0.log (45.74 KB, text/plain)
2018-10-28 04:46 UTC, nanericwang 		Details
xorg.1.log (33.88 KB, text/plain)
2018-10-28 04:47 UTC, nanericwang 		Details
dmesg with drm.debug=0x1e log_buf_len=4M (295.22 KB, text/plain)
2018-10-28 05:38 UTC, nanericwang 		Details
Show Obsolete (1) Add an attachment (proposed patch, testcase, etc.)

Description nanericwang 2018-10-28 04:44:40 UTC 
Created attachment 279225 [details]
dmesg

Repro steps:
1. "xset dpms force standby" or "xset dpms force off"
2. press any key or move mouse
4. the screen is totally black, but i can still operate the system blindly.

I use modesetting driver on KabyLake 7200U.

btw, my another machine (AMD iGPU) uses same modesetting driver + same kernel + same distro, but has no such issue.
Comment 1 nanericwang 2018-10-28 04:45:04 UTC 
Created attachment 279227 [details]
xorg.conf
Comment 2 nanericwang 2018-10-28 04:46:08 UTC 
Created attachment 279229 [details]
xorg.0.log
Comment 3 nanericwang 2018-10-28 04:47:08 UTC 
Created attachment 279231 [details]
xorg.1.log
Comment 4 nanericwang 2018-10-28 05:38:47 UTC 
Created attachment 279233 [details]
dmesg with drm.debug=0x1e log_buf_len=4M
Comment 5 nanericwang 2018-10-28 06:13:09 UTC 
I saw "eDP port A panel power wasn't enabled" in dmesg. And then, I explicitly suspended laptop and resumed to bring the screen back.
Comment 6 Jani Nikula 2019-01-22 16:40:12 UTC 
Please file drm/i915 bugs at https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
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