Arch Linux

lawsa

Member

Registered: 2018-07-23

Posts: 2

Dell Laptop Dock Monitors

I'm using a Dell laptop with a dock. Two external monitors are attached and worked fine until about three weeks ago. Now, when I xrandr --output DP-1-4 --mode 1920x1080;, I get "xrandr: Configure crtc 3 failed". xrandr outputs:

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
eDP-1 connected primary (normal left inverted right x axis y axis)
   1920x1080     60.02 +  60.01    59.97    59.96    59.93    48.02  
   1680x1050     59.95    59.88  
   1400x1050     59.98  
   1600x900      59.99    59.94    59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1440x810      60.00    59.97  
...snip...
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
   1920x1080     60.00*+
   1600x1200     60.00  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
...snip....
DP-2 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
eDP-1-2 disconnected (normal left inverted right x axis y axis)
DP-1-4 connected (normal left inverted right x axis y axis)
   1920x1080     60.00 +  59.96    59.93  
   1920x1200     59.95  
   1600x1200     65.00    60.00  
   1680x1050     59.95    59.88  
...snip...
DP-1-5 disconnected (normal left inverted right x axis y axis)
DP-1-6 disconnected (normal left inverted right x axis y axis)
VGA-1-1 disconnected (normal left inverted right x axis y axis)
...analog modes...

(I'm not sure why that second head is called HDMI; it's plugged into the Dock's DVI...maybe some emulation going on?)

I'm using Radeon with mesa.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 76,212

Re: Dell Laptop Dock Monitors

https://bbs.archlinux.org/viewtopic.php?id=237344

Nobody asked there, but since it seems related to the X11 server version: do you use the modesetting driver?
(If not: try)

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