linux-kernel - Re: [PATCH] vt: disable console blanking by default

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Message-ID: <20140622163728.GA4461@amd.pavel.ucw.cz>
Date:	Sun, 22 Jun 2014 18:37:29 +0200
From:	Pavel Machek <pavel@....cz>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vt: disable console blanking by default

On Wed 2014-06-18 11:27:31, Tomasz Torcz wrote:
> 
> >From ea7cf47e3230eda63aa6c46092719437f9bbae8e Mon Sep 17 00:00:00 2001
> From: Tomasz Torcz <tomek@...ebreaker.pl>
> Date: Wed, 18 Jun 2014 11:18:06 +0200
> Subject: [PATCH] vt: disable console blanking by default
> 
>   Remove default 10 minute blank interval. Instead: never blank by
>   default.
>   "Screensaving" is no longer useful.  Today it only provides
>   obstacle when interacting with text console, especially through
>   remote lights-out management solutions.
> 
> Signed-off-by: Tomasz Torcz <tomek@...ebreaker.pl>

Dunno. You'll kill an LCD if you let same image there for too
long. Make it 10hours?

								Pavel

>  Documentation/kernel-parameters.txt | 4 ++--
>  drivers/tty/vt/vt.c                 | 2 +-
>  2 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
> index 6eaa9cd..0618648 100644
> --- a/Documentation/kernel-parameters.txt
> +++ b/Documentation/kernel-parameters.txt
> @@ -710,8 +710,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
>  		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.
> +			seconds. A value of 0 disables the blank timer.
> +			Defaults to never blank.
>  
>  	coredump_filter=
>  			[KNL] Change the default value for
> diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
> index 5e0f6ff..dbd4f23 100644
> --- a/drivers/tty/vt/vt.c
> +++ b/drivers/tty/vt/vt.c
> @@ -176,7 +176,7 @@ int console_blanked;
>  
>  static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
>  static int vesa_off_interval;
> -static int blankinterval = 10*60;
> +static int blankinterval;
>  core_param(consoleblank, blankinterval, int, 0444);
>  
>  static DECLARE_WORK(console_work, console_callback);

-- 
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(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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