Configure crtc 3 failed

[Laws, Aaron C]

A while back, I was using the following script to configure my monitors.

#!/bin/sh
xrandr --output eDP-1 --mode 1920x1080 --pos 0x0 --rotate normal \
   --output HDMI-1 --primary --mode 1920x1080 --pos 1920x0 --rotate normal \
   --output DP-1-4 --mode 1920x1080 --pos 3848x0 --rotate normal

But now, I get "xrandr: Configure crtc 3 failed". I've tried many other configurations, but basically any time I try to turn on DP-1-4, I get this error. I've even tried turning it on as a different crtc with no success (the error message changes to the crtc that I specified).

When I downgrade to xorg server 19.6 the monitor works fine. I finally moved off 19.6 because other things aren't working properly as I keep the rest of my system up to date.

My system configuration:

Arch linux, xorg server 1.20.0 (1.20.0-9), xorg-xrandr 1.5.0-1, libxrandr 1.5.1-2

Dell precision 7710 on a dell dock with two external DVI-connected monitors.

Xrandr; returns

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

Let me know what more information may be helpful or if I should be asking somewhere else. Thanks!
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