linux-kernel - Re: [PATCH] console: make blank timeout value a boot option

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Message-ID: <20090604074407.GX26148@buzzloop.caiaq.de>
Date:	Thu, 4 Jun 2009 09:44:09 +0200
From:	Daniel Mack <daniel@...aq.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] console: make blank timeout value a boot option

On Thu, Jun 04, 2009 at 12:23:25AM -0700, Andrew Morton wrote:
> > --- a/Documentation/kernel-parameters.txt
> > +++ b/Documentation/kernel-parameters.txt
> > @@ -545,6 +545,10 @@ and is between 256 and 4096 characters. It is defined in the file
> >  			console=brl,ttyS0
> >  		For now, only VisioBraille is supported.
> >  
> > +	consoleblank=	[KNL] The console blank (screen saver) timeout in
> > +			seconds. Defaults to 10*60 = 10mins. A value of 0
> > +			disables the blank timer.
> > +
> 
> It would be better to make this alterable at runtime, rather than at
> boot time.  Perhaps another VT ioctl.

That's already possible - there is an ioctl for that. It's just not
configurable at boot time, and that occured to be very annoying when
developing systems that won't fully boot up for >10mins. You have no way
to wake up the console then.

Is there any concern why that shouldn't be a kernel option?

Daniel

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