Re: Screensaver support for the Hurd console

[Peter 'p2' De Schrijver]

Hi,

> Hi,
> 
> As some of you might remember, I sent in a patch for screensaver
> support for the Hurd console.  I am resurrecting that patch now.
> 
> All work has mostly be done.  At the moment my biggest doubt is how to
> configure the screensaver support when starting the console client.  I
> have two ideas for that:
> 
> First of all, a screensaver can be registered by any plugin.  So the
> `life' plugin registers the `life' screensaver, a screensaver that
> shows conways game of life.  There is a blank plugin that registers
> the screensaver blank, which just clears the screen.  The vga driver
> will register 3 screensavers: vga_standby, vga_suspend and vga_off.
> These correspond with the DPMS power levels.
> 
> To configure the screensaver I could use this:
> 
> console -d vga .... --dpms-standby=vga_standby --dpms-off=vga_off 
> --dpms-standby-timeout=400 --dpms-off-timeout=800 --saver-events=INPUT,BELL 
> /dev/vcs
> 
> In that case the console will start blanking after 400 seconds using
> the vga_off screensaver and the display will turn off after
> (400+800=)1200 seconds using vga_off.  It will stop when someone
> presses a key or the bell is activated.
> 
> Another way to configure this would be:
> 
> console -d vga .... --screensaver="vga_standby=400,vga_off=800" 
> --saver-events=INPUT,BELL /dev/vcs
> 
> Or even:
> 
> console -d vga .... --screensaver="vga_standby,vga_off" 
> --saver-events=INPUT,BELL /dev/vcs
> 

I think we need a message interface to the screensaver for configuration.
This allows per user configuration. (ie. if another user logs in on the
console, a program can be launched from her .bash_profile to reconfigure
the screensaver to her personal settings). It also allows any fancy
configuration scheme without impacting the console code at all.

Cheers,

Peter (p2).

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