[regression] xrandr: cannot find crtc for output eDP1

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On 09.03.2012 19:04, Oleksij Rempel (fishor) wrote:
> Hallo all,
>
> i get this error if try to use external monitor with my laptop (Asus
> zenbook ux31e). Usually it is configured automatically or with gui. But
> not it is not working. I got this regression for some weeks after some
> of updates. I assume it was one of xorg/intel driver updates. I use
> ubuntu 12.04,
>
> I tested:
> - kernel versions 3.2.0-12-generic, 3.2.0-17-generic and vanilla git
> 3.3.0-rc6-00164-g4f262ac.
> - X.Org X Server 1.12.0
> - xserver-xorg-video-intel i tested default precise version
> 2:2.17.0-1ubuntu4 and xorg-edgers version
> 2:2.18.0+git20120308.aa7a2bd7-0ubuntu0sarvatt
>
> without any luck :(
>
> suddenly i can't get old working version to "bisect" it.
>
> if i run this command:
> xrandr --output eDP1 --auto --output VGA1 --auto --same-as eDP1
> i get:
> xrandr: cannot find crtc for output eDP1
>
> here is output of xrandr:
> xrandr
> Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
> eDP1 connected (normal left inverted right x axis y axis)
> 1600x900 60.0 +
> 1440x900 59.9
> 1360x768 59.8 60.0
> 1152x864 60.0
> 1024x768 60.0
> 800x600 60.3 56.2
> 640x480 59.9
> VGA1 connected 1280x1024+0+0 (normal left inverted right x axis y axis)
> 338mm x 270mm
> 1280x1024 60.0*+ 75.0
> 1280x960 60.0
> 1152x864 75.0
> 1024x768 75.1 70.1 60.0
> 832x624 74.6
> 800x600 72.2 75.0 60.3 56.2
> 640x480 72.8 75.0 66.7 60.0
> 720x400 70.1
> HDMI1 disconnected (normal left inverted right x axis y axis)
> DP1 disconnected (normal left inverted right x axis y axis)

more info:
interesting part of dmesg:
[  681.003441] [drm:pch_irq_handler] *ERROR* PCH poison interrupt
[  764.024988] [drm:drm_crtc_helper_set_config] *ERROR* failed to set 
mode on [CRTC:5]
[ 1120.654342] [drm:drm_crtc_helper_set_config] *ERROR* failed to set 
mode on [CRTC:5]


part of xorg:
[  1120.426] (II) intel(0): Allocated new frame buffer 1600x1024 stride 
6656, tiled
[  1120.493] (EE) intel(0): failed to set mode: Invalid argument
[  1120.603] (II) intel(0): Allocated new frame buffer 1280x1024 stride 
5120, tiled


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