Richard Owlett composed on 2017-06-23 06:25 (UTC-0500):
.
>> I've identified one problem source.
>> At least sometimes after a power off shut down it comes up with the
>> laptop display selected as primary.
>> How can I force it to always come up with the VGA monitor as primary?
.
Maybe https://www.kernel.org/doc/Documentation/fb/modedb.txt is what you need?
"You can additionally specify which output the options matches to.
To force the VGA output to be enabled and drive a specific mode say:
video=VGA-1:1280x1024@60me
"Specifying the option multiple times for different ports is possible, e.g.:
video=LVDS-1:d video=HDMI-1:D"
.
>> I created /home/richard/.screenlayout/VGA-as-master.sh with preferred
>> settings back when I was experimenting. I had understood ARandR would
>> use it automatically. It evidently doesn't.
.
> If that script is manually run after logging in as a particular user
> both displays display as desired.
.
> My remaining problem is not knowing how to run the script automatically
> when a particular user logs in. [ARandR is designed as a 'per-user
> function']
> How?.
>
Must it only be for one specific user? If so, then it needs to be called by any
of several usual means for user-specific startup scripts. It won't be run simply
because it exists.
If OTOH global application will suffice, put it in /etc/X11/Xsession.d, which
will apply it as a consequence of using any GUI login greeter. If you wish it
applied to include the greeter, you can convert its content into an xorg.conf,
or maybe merge it into /etc/X11/ elsewhere somehow (which I've never managed to
do).
.
> The content of the script file is:
>> #!/bin/sh
>> xrandr --output VGA-1 --primary --mode 1280x1024 --pos 0x0 --rotate normal
>> --output LVDS-1 --mode 1366x768 --pos 0x0 --rotate normal --output HDMI-3
>> --off --output HDMI-2 --off --output HDMI-1 --off --output DP-3 --off
>> --output DP-2 --off --output DP-1 --off
.
> A bug report has been filed
> <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=865535>
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