Re: dbus and system events - howto

Quoting Vladimir Grebenschikov <[email protected]>:

> Hi
>
> I am wandering is there "right" way to pass "system" events, like
> brightness buttons, volume buttons reported with devd to gnome desktop
> to:
> 1. do appropriate changes (change volume, brightness, etc)
> 2. show nice informational popup (with volume bar and so on)
> ?
>
> Before I had simple script, called from devd, it configures system with
> xbacklight, mixer and sysctl's, and shows something with onscreend
> daemon.
>
> After Xorg update oscreend starts to freeze by some reason. So now I am
> thinking about more "sane" way to link system events to gnome desktop.
>
> Also xbacklight now does not works with radeonhd again.
>
> So far I've dig for following dbus calls to manage brihgtness:
> 	/usr/local/bin/dbus-send --system --type=method_call  
> --print-reply=1 		--dest=org.freedesktop.PowerManagement 		--session  
> /org/freedesktop/PowerManagement/Backlight  
> 		org.freedesktop.PowerManagement.Backlight.GetBrightness
>
> 	/usr/local/bin/dbus-send --system --type=method_call  
> --print-reply=1 		--dest=org.freedesktop.PowerManagement 		--session  
> /org/freedesktop/PowerManagement/Backlight  
> 		org.freedesktop.PowerManagement.Backlight.SetBrightness uint32:$1
>
> But, looks like they are not shows popup.
> And I've not found simple solution about volume yet.
>
> Hints will be appreciated.
>
> PS:
>   Side question, can dbus work without DISPLAY and XAUTHORITY initialized ?
>   (system bus ?, but above calls requires them)
>
> PPS:
>   8-CURRENT, Gnome, IBM T60.


Just a side note: audio/osdmixer runs nicely in the background and  
shows any change to mixer volume via misc/xosd.

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