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lawsa

Member

Registered: 2018-07-23

Posts: 2

New X-Org Server causes One DVI Monitor not working on Dell Precision

When I downgrade xorg server to about six months ago, the monitor works. I've been doing that for a pretty long time, but it's becoming apparent that it's getting buggy as the other packages progress.

xrandr says

Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 382mm x 215mm
   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  
...snip...
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 connected 1920x1080+1920+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  
   1400x1050     74.76    59.98  
   1600x900      59.95    59.82  
 ...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)
  1920x1080 (0x4b) 148.500MHz +HSync +VSync
        h: width  1920 start 2008 end 2052 total 2200 skew    0 clock  67.50KHz
        v: height 1080 start 1084 end 1089 total 1125           clock  60.00Hz
  1920x1080 (0x4d) 173.000MHz -HSync +VSync
        h: width  1920 start 2048 end 2248 total 2576 skew    0 clock  67.16KHz
        v: height 1080 start 1083 end 1088 total 1120           clock  59.96Hz
  1920x1080 (0x4e) 138.500MHz +HSync -VSync
        h: width  1920 start 1968 end 2000 total 2080 skew    0 clock  66.59KHz
        v: height 1080 start 1083 end 1088 total 1111           clock  59.93Hz
  1600x1200 (0x50) 162.000MHz +HSync +VSync
        h: width  1600 start 1664 end 1856 total 2160 skew    0 clock  75.00KHz
...snip

Although the input says HDMI-1, I actually have two DVI-connected monitors and one built-in. I'm guessing the Dell dock does some trickery? I'm using a Dell Precision 7710. I have a script that works with the older xorg server:

xrandr --output eDP-1 --mode 1920x1080 --pos 0x0 --rotate normal \
   --output eDP-1-2 --off \
   --output HDMI-3 --off \
   --output HDMI-2 --off \
   --output HDMI-1 --primary --mode 1920x1080 --pos 1920x0 --rotate normal \
   --output DP-1-6 --off \
   --output DP-1-5 --off \
   --output DP-1-4 --mode 1920x1080 --pos 3848x0 --rotate normal \
   --output DP-3 --off \
   --output DP-2 --off \
   --output DP-1 --off \
   --output VGA-1-1 --off

But when I run it now, it says, "xrandr: Configure crtc 3 failed". I've tried a lot of things but anything that attempts to use that DVI port (connected to that monitor) doesn't work. For instance, when I switch the port to which the monitors are connected, the other one doesn't work (it's the port, not the monitor). Other things I've tried: downgrading Xorg Server (WORKS), using arandr (doesn't work), using a different script that only activates the external monitors:

#!/bin/sh
xrandr --output eDP-1 --off \
    --output eDP-1-2 --off \
    --output HDMI-3 --off \
    --output HDMI-2 --off \
    --output HDMI-1 --mode 1920x1080 --pos 0x0 --rotate normal \
    --output DP-1-6 --off \
    --output DP-1-5 --off \
    --output DP-1-4 --mode 1920x1080 --pos 1920x0 --rotate normal \
    --output DP-3 --off \
    --output DP-2 --off \
    --output DP-1 --off \
    --output VGA-1-1 --off

Based on the symptoms, I would say this is an x-org bug: at least in the way it's interacting with my setup.

Please let me know if you think of anything; something small could be big! ;-)

Last edited by lawsa (2018-08-07 16:33:45)