Re: Running X window programs from PM suspend-resume scripts

On Monday 22 March 2010, Chris Tyler wrote:
On Mon, 2010-03-22 at 22:38 +0200, Serguei Miridonov wrote:
On Monday 22 March 2010, Chris Tyler wrote:
On Mon, 2010-03-22 at 21:10 +0200, Serguei Miridonov wrote:
Hello,

Is there a trick to run X window programs from PM
suspend-resume hooks? For example, I need to restore
keyboard mapping after suspend to RAM using

xkbcomp some_file.xkm :0.0

Running this in

#!/bin/bash
DISPLAY=":0.0"
export DISPLAY
case $1 in

hibernate | suspend)

;;

thaw | resume)

sleep 2

chvt 1
sleep 1
xkbcomp /etc/X11/GoodKeyMap.xkm $DISPLAY
;;

*)

;;

esac
exit 0

gives an error: Cannot open display ":0.0"

Any idea?

Sounds like a problem with auth. Try setting the XAUTHORITY
environment variable, perhaps?

OK, I have changed the script adding the line

user=`who | grep -e ' :0' | sed 's/ *:0.*$//'`

and then running the required command as

su - $user -c "xkbcomp /etc/X11/GoodKeyMap.xkm $DISPLAY"

It works now. Is there a something simpler?

This works because, with a HOME directory specified, the xkbcomp
command can find the ~/.Xauthority file to get the magic cookie
for display connection authentication.

You should be able to set the XAUTHORITY environment variable to
the absolute path of the .Xauthority file instead of using su (try
something like: export XAUTHORITY=/home/${user}/.Xauthority)

Yes, this works too. Thanks.

Serguei


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