Bug 69204

Summary: [Baytrail-M] xrandr can detect VGA while only plugged in eDP on machine
Product: DRI Reporter: shui yangwei <yangweix.shui>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: major    
Priority: medium CC: intel-gfx-bugs
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg: VGA detected without been plugged none

Description shui yangwei 2013-09-11 05:33:17 UTC 
Created attachment 85601 [details]
dmesg: VGA detected without been plugged

Environment:
--------------------
Kernel: (drm-intel-nightly)da66146425c3136943452988afd3d64cd551da58
Author: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date:   Fri Sep 6 16:03:28 2013 +0300
    drm/i915: include hangcheck action and score in error_state

lspci:
--------------------
00:02.0 VGA compatible controller: Intel Corporation Device 0162 (rev 09)

Test Steps:
--------------------
1. Only with eDP plugged on machine
2. xinit & ,  xrandr:

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 282mm x 165mm
   1920x1080      60.0*+
   1400x1050      60.0
   1280x1024      60.0
   1280x960       60.0
   1024x768       60.0
   800x600        60.3     56.2
   640x480        59.9
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm   1024x768       60.0*
   800x600        60.3     56.2
   848x480        60.0
   640x480        59.9

Description:
---------------------
In our opinion, xrandr can only detect the plugged display pipe, but Baytrail machine can print VGA information without been plugged. Add command "video=VGA-1:d" in grub, we can disable VGA and  xrandr will display correctly. Both 32bit and 64bit machine reproduceable. This issue exists on older kernels, it's not a regression.
Comment 1 shui yangwei 2013-09-11 05:54:52 UTC 
If we only plugged VGA, xrandr also output both VGA and eDP pipe information.
Comment 2 Daniel Vetter 2013-09-11 07:33:40 UTC 
Should be fixed with

commit 6c4a8962a4a078cacfc8eb5d4bd79f6343b8cd7a
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Tue Sep 10 14:54:42 2013 -0700

    drm/i915/vlv: re-enable hotplug detect based probing on VLV/BYT
Comment 3 shui yangwei 2013-09-12 01:41:54 UTC 
(In reply to comment #2)
> Should be fixed with
> 
> commit 6c4a8962a4a078cacfc8eb5d4bd79f6343b8cd7a
> Author: Jesse Barnes <jbarnes@virtuousgeek.org>
> Date:   Tue Sep 10 14:54:42 2013 -0700
> 
>     drm/i915/vlv: re-enable hotplug detect based probing on VLV/BYT

OK, I find  the patch works, but there's some strange things come up. I will file new bugs and paste the link here to track.
Comment 4 shui yangwei 2013-09-24 04:02:51 UTC 
(In reply to comment #3)
> (In reply to comment #2)
> > Should be fixed with
> > 
> > commit 6c4a8962a4a078cacfc8eb5d4bd79f6343b8cd7a
> > Author: Jesse Barnes <jbarnes@virtuousgeek.org>
> > Date:   Tue Sep 10 14:54:42 2013 -0700
> > 
> >     drm/i915/vlv: re-enable hotplug detect based probing on VLV/BYT
> 
> OK, I find  the patch works, but there's some strange things come up. I will
> file new bugs and paste the link here to track.

Other newly found bugs are not related to xrandr, so there's no need to track other bugs here anymore.
Comment 5 Elizabeth 2017-10-06 14:43:14 UTC 
Closing old verified.

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