[gentoo-user] controlling xscreensaver throttle

[gentoo-user] controlling xscreensaver throttle

[»Q«]

I'm using a laptop, and I'd like xscreensaver to just display a blank
screen when running on battery power.  The command

$ xscreensaver-command --throttle

does that (though AFAICT jwz hasn't documented --throttle and
--unthrottle).  I use KDE (but not KDE's screensaver wrapper) and Xfce4,
and for them I've got a simple script that checks the power source and
sets the throttle accordingly whenever I use the icons or the keyboard
to lock the screen manually.

But when xscreensaver kicks in because of idle time, it's unthrottled
no matter the power source, and I can't find a way to control that.  If
I could control this, I'd be happy.  The stuff below about suspending is
less important to me.

I use suspend2 to suspend to HDD, and I want to lock the screen
when suspending. Using the LockXScreenSaver option in hibernate.conf
locks all X displays, but even if xscreensaver is throttled before
that, upon resume from suspend it's unthrottled.  AFAICT, when
resuming, suspend2 actually restarts xscreensaver, so its state was
lost.

Alternatively, if don't use LockXScreenSaver but instead just have
the hibernate script call the script which sets the throttle state,
this works fine but only locks one screen.  Usually that's ok, but
sometimes I have more than one X session active, and I'd like to lock
them all.

None of this is Gentoo-specific, so if you'd like to point me somewhere
else, feel free.

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Re: [gentoo-user] controlling xscreensaver throttle

[Iain Buchanan]

On Fri, 2007-05-25 at 20:09 -0500, »Q« wrote:
> I'm using a laptop, and I'd like xscreensaver to just display a blank
> screen when running on battery power.  The command
> 
> $ xscreensaver-command --throttle

[snip]

> But when xscreensaver kicks in because of idle time, it's unthrottled
> no matter the power source, and I can't find a way to control that.  If
> I could control this, I'd be happy.  The stuff below about suspending is
> less important to me.

how about running a daemon to watch the output of
`xscreensaver-command -watch`
instead of using your script.  That way, regardless of what kicks off
the screensaver (you or the timeout) you can then do some action to it.

> I use suspend2 to suspend to HDD, and I want to lock the screen
> when suspending. Using the LockXScreenSaver option in hibernate.conf
> locks all X displays, but even if xscreensaver is throttled before
> that, upon resume from suspend it's unthrottled.  AFAICT, when
> resuming, suspend2 actually restarts xscreensaver, so its state was
> lost.

I think the above solution could work here too.

HTH,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

<Deek> If the user points the gun at his foot and pulls the trigger, it
       is our job to ensure the bullet gets where it's supposed to.

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[gentoo-user] Re: controlling xscreensaver throttle

[»Q«]

In <news:1180742744.15806.3.camel@orpheus>,
Iain Buchanan <iaindb@netspace.net.au> wrote:

> On Fri, 2007-05-25 at 20:09 -0500, »Q« wrote:
> > I'm using a laptop, and I'd like xscreensaver to just display a
> > blank screen when running on battery power.  The command
> > 
> > $ xscreensaver-command --throttle
> 
> [snip]
> 
> > But when xscreensaver kicks in because of idle time, it's
> > unthrottled no matter the power source, and I can't find a way to
> > control that.  If I could control this, I'd be happy.  The stuff
> > below about suspending is less important to me.
> 
> how about running a daemon to watch the output of
> `xscreensaver-command -watch`
> instead of using your script.  That way, regardless of what kicks off
> the screensaver (you or the timeout) you can then do some action to
> it.

[snip my stuff about resuming from suspend2]
 
> I think the above solution could work here too.

Yes, thanks.  That looks like a good idea, and I'll try it when I get
some time to tinker.

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