Setting new mode for 2nd monitor fails

[Alex Deucher]

On Fri, Jun 9, 2017 at 12:49 PM, Andrej van der Zee
<andrejvanderzee at gmail.com> wrote:
> Hi,
>
> Thanks for your prompt reply. Attached dmesg and Xorg.log.

I'm not familiar with the display capabilities of various intel chips
unfortunately.  I'd guess it has something to do with the level of DP
supported by the GPU.

Alex

>
> Thanks,
> Andrej
>
> On Fri, Jun 9, 2017 at 6:46 PM, Alex Deucher <alexdeucher at gmail.com> wrote:
>>
>> On Fri, Jun 9, 2017 at 12:39 PM, Andrej van der Zee
>> <andrejvanderzee at gmail.com> wrote:
>> > Hi,
>> >
>> > My external monitors resolution is too low, but xrandr does not show any
>> > higher resolution. I am trying to create a new mode, but it falis to
>> > start
>> > like below. How can I set the resolution of my external monitor to
>> > 4096x2160?
>>
>> I suspect the driver has removed any modes that it can't support due
>> to a lack of memory bandwidth or a support level (e.g., the 4K modes
>> on your monitor require DP 1.2 and your card only supports DP 1.1).
>> What chip is this?  You'll probably want to provide your xorg log and
>> dmesg output.
>>
>> Alex
>>
>> >
>> > Thanks,
>> > Andrej
>> >
>> > $ xrandr
>> > Screen 0: minimum 8 x 8, current 5440 x 1800, maximum 32767 x 32767
>> > eDP1 connected primary 2880x1800+0+0 (normal left inverted right x axis
>> > y
>> > axis) 331mm x 207mm
>> >    2880x1800     59.99*+
>> >    2560x1600     60.00
>> >    2048x1536     60.00
>> >    1920x1440     60.00
>> >    1856x1392     60.01
>> >    1792x1344     60.01
>> >    1920x1200     60.00    59.95
>> >    1920x1080     59.93
>> >    1600x1200     60.00
>> >    1680x1050     60.00    59.95    59.88
>> >    1600x1024     60.17
>> >    1400x1050     59.98
>> >    1280x1024     60.02
>> >    1440x900      59.89    60.00
>> >    1400x900      60.00
>> >    1280x960      60.00
>> >    1360x768      59.80    59.96
>> >    1280x800      60.00
>> >    1152x864      60.00
>> >    1024x768      60.00
>> >    800x600       60.32    56.25
>> >    640x480       59.94
>> > DP1 connected 2560x1440+2880+0 (normal left inverted right x axis y
>> > axis)
>> > 597mm x 336mm
>> >    2560x1440     59.95*+
>> >    1280x720      59.86
>> > DP2 disconnected (normal left inverted right x axis y axis)
>> > HDMI1 disconnected (normal left inverted right x axis y axis)
>> > HDMI2 disconnected (normal left inverted right x axis y axis)
>> > HDMI3 disconnected (normal left inverted right x axis y axis)
>> > VGA1 disconnected (normal left inverted right x axis y axis)
>> > VIRTUAL1 disconnected (normal left inverted right x axis y axis)
>> >
>> > $ xrandr --newmode "4096x2160_60.00"  759.54  4096 4424 4880 5664  2160
>> > 2161
>> > 2164 2235  -HSync +Vsync
>> > $ xrandr --addmode DP1 4096x2160_60.00
>> > $ xrandr --verbose --output DP1 --mode  4096x2160_60.00
>> > screen 0: 5440x2160 1438x571 mm  96.05dpi
>> > crtc 2: 4096x2160_60.00  60.00 +0+0 "DP2"
>> > xrandr: Configure crtc 2 failed
>> > crtc 0: disable
>> > crtc 1: disable
>> > crtc 2: disable
>> > crtc 3: disable
>> > screen 0: revert
>> > crtc 0: revert
>> > crtc 1: revert
>> > crtc 2: revert
>> > crtc 3: revert
>> >
>> >
>> >
>> > _______________________________________________
>> > xorg at lists.x.org: X.Org support
>> > Archives: http://lists.freedesktop.org/archives/xorg
>> > Info: https://lists.x.org/mailman/listinfo/xorg
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>
>
>
>
> --
> Andrej van der Zee
> Oranje-Vrijstaatkade 49
> 1093KS Amsterdam
> +31-(0)6-8133-9388