[SOLVED] Force GUI resolution on start-up

[Jagadguru]

Hi all,

 

I know this is kind of a niche thing and doesn't qualify for a feature request.

 

I'm trying to get unRIAD to start the X server with a specific resolution or set the res. by script after start. I have been digging into the startup scripts for X and slim the windows manager unRIAD uses.
Here is my go file:

 

#set display reslolution for a decent update speed

cp /boot/config/X/.Xauthority /root/

export DISPLAY=:0.0
export XAUTHORITY=~/.Xauthority


xhost +


xrandr -display :0.0 -s 5

I also wrote a script to change the resolution on array start:

 

#!/bin/bash

telnet localhost

touch ~/.Xauthority

export DISPLAY=:0.0
export XAUTHORITY=~/.Xauthority

xhost +

echo "xrandr -display :0.0 -s 5" | at NOW + 2 min

xauth info

xhost +si:localuser:root

xauth info

xrandr -display :0.0 -s 5

sleep 10

xrandr -display :0.0 -q

This results in a "protocol error". I think it is because there is no entry in .Xauthority for localhost and I don't know how to generate one automatically. if I run xhost + from remote over ssh, the entry is added and everything is good. But localhost doesn't have the authority  to run xhost + by itself.I know there are unnecessary bits in the script, but I just threw them in for testing.

 

I'm assuming there are a couple of different ways to go about this.

 

[Jagadguru]

Solved by changing  the line export XAUTHORITY=~/.Xauthority to 

export XAUTHORITY=/var/run/slim.auth

The login screen is not the right resolution, so I can't see the username/password box, but hey it's pretty good. The session is in the right resolution.

Edited April 25, 2020 by Jagadguru
correction