[SOLVED] acpid - Catch button/lid close and locking the screen

spikeh · 2012-04-15 07:45:49

Hello,

I'm trying to get acpid's handler.sh to catch lid closure and locking the screen. I'm running Gnome Shell. The relevant snippet adapted from the acpid wiki in my handler.sh is shown below:

    button/lid)
        case "$3" in
            close)
                # Screen on/off handled by BIOS.
                gss=$(ps up $(pidof gnome-screensaver) | awk '/gnome-screensaver/ { print $1 }')
                logger $gss
                # /usr/sbin/pm-suspend
                su $gss -c "gnome-screensaver-command -l"
                ;;
        esac
        ;;

handler.sh is definitely catching "button/lid LID close", as $gss (containing my username) is indeed logged to /var/log/messages.log. But the `su $gss -c "gnome-screensaver-command -l"` line isn't working! If I uncomment the pm-suspend line and comment the gnome-screensaver-command line, the machine correctly suspends to RAM. If I run `su spikeh -c "gnome-screensaver-command -l"` as root in terminal, the machine correctly locks the screen.

I'm really baffled by this! Can anyone see a problem with my code?

Edit: It seems like I need to define the DISPLAY env var for root to specify the screen to lock before running gnome-screensaver-command!

DISPLAY=:0.0 su $gss -c "gnome-screensaver-command -l"

Last edited by spikeh (2012-04-15 08:13:03)

ConnorBehan · 2012-04-15 08:11:11

Is acpi-handler.sh running as the same user that you use to perform the command manually? Are you sure it isn't hanging because su asks for a password? Sometimes su has unexpected behaviour because of environment variables. There's also "sudo -u $gss gnome-screensaver-command -l" that you could try.

spikeh · 2012-04-15 08:17:25

While I have resolved the issue, I appreciate your post ConnorBehan.

I believe `su spikeh -c "gnome-screensaver-command -l"` worked for me in terminal because DISPLAY is already set when I su to root, so you're right that su didn't behave how I expected because of env vars.

Arch Linux

#1 2012-04-15 07:45:49

[SOLVED] acpid - Catch button/lid close and locking the screen

#2 2012-04-15 08:11:11

Re: [SOLVED] acpid - Catch button/lid close and locking the screen

#3 2012-04-15 08:17:25

Re: [SOLVED] acpid - Catch button/lid close and locking the screen

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