Bug 84888 - [BSW]DP monitor unable to light up after boot with edp + DP together
Summary: [BSW]DP monitor unable to light up after boot with edp + DP together
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other All
: high critical
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-10-11 03:06 UTC by Guo Jinxian
Modified: 2017-10-06 14:35 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg (89.67 KB, text/plain)
2014-10-11 03:06 UTC, Guo Jinxian 		no flags Details
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Description Guo Jinxian 2014-10-11 03:06:01 UTC 
Created attachment 107687 [details]
dmesg

==System Environment==
--------------------------
Regression: Not sure.
We will further investigate it later. 

Non-working platforms: BSW

==kernel==
--------------------------
origin/drm-intel-nightly: ea4bec8e96ea8b33b49a7892c1c7f20041a56da6(fails)
    drm-intel-nightly: 2014y-10m-09d-07h-58m-45s UTC integration manifest
origin/drm-intel-next-queued: a128efeaa64609a9672b51bb37bb703e1b0f0128(fails)
    drm/i915: Suppress no action noise from oom shrinker
origin/drm-intel-fixes: bfe01a5ba2490f299e1d2d5508cbbbadd897bbe9(fails)
    Linux 3.17

==Bug detailed description==
DP monitor unable to light up after boot. The monitor unable to detect by testdisplay or xrandr.



==Reproduce steps==
---------------------------- 
1. Plug DP monitor
2. Boot
Comment 1 Sean V Kelley 2014-10-16 16:12:29 UTC 
Please include the Board Fab number, i.e. Fab2 201/202 or Fab1 101/102, the SoC stepping, and whether the board has been reworked.
Comment 2 Guo Jinxian 2014-10-24 05:38:32 UTC 
(In reply to Sean V Kelley from comment #1)
> Please include the Board Fab number, i.e. Fab2 201/202 or Fab1 101/102, the
> SoC stepping, and whether the board has been reworked.

The the Board Fab number is Fab1 102, the cpu stepping is 2, the board has been reworked.
Comment 3 wendy.wang 2014-10-24 06:11:48 UTC 
Test on both BSW RVP FAB1 and FAB2 board, with latest drm-intel-nightly branch kernel:
2014_10_24/drm-intel-nightly/6f628cbf2f18ac47e8afad50e3c328bbc33754d2

The steps to reproduce are:
1. Shutdown machine, and connect DP and EDP panel
2. power on and observe
3. after start kernel: only edp has signal, DP monitor no display.
Comment 4 Yi Sun 2014-10-24 07:22:28 UTC 
My finding.

   if (boot OS with DP) {
      DP doesn't work
   }
   else if (boot OS without DP) {
     if (console switch to login screen){
       DP works once plugged in
     }
 
     if (console stay on the log screen){
       DP doesn't work, unless switch VT manually (ctrl+alt+F2~)
     }
   }
Comment 5 wendy.wang 2014-10-31 08:13:53 UTC 
DP issue has been fixed, after verified latest (2014-10-30)-nightly branch kernel:
 Kernel:   (drm-intel-nightly)bd21cf795cf5dc278f1451d0f7a597cb1d13c2ba

when edp+ DP connected, and boot up system, DP is working.
Comment 6 Elizabeth 2017-10-06 14:35:00 UTC 
Closing old verified.

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