linux-kernel - Re: blink driver power saving

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Date:	Tue, 3 Jul 2007 09:12:37 +0200
From:	Bernhard Walle <bwalle@...e.de>
To:	Pavel Machek <pavel@....cz>
Cc:	Andi Kleen <ak@...e.de>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Indan Zupancic <indan@....nu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: blink driver power saving

* Pavel Machek <pavel@....cz> [2007-07-03 01:08]:
> On Mon 2007-07-02 14:39:27, Andi Kleen wrote:
> > 
> > > > Perhaps one of you geniuses who all hate it can find a better way to
> > > > solve the "video output dead after kexec; but need visual feedback to the user
> > > > while crash dumping" problem. I'm waiting for your patches.
> > > >
> > > 
> > > I don't don't like it ;) Unfortunately too many people end up enabling
> > 
> > Yes that's pretty weird. I admit I hadn't expected
> > that problem. blink is equivalent to "annoy me" and it
> > is a mystery why so many people should willingly ask their computer to 
> > annoy them.
> 
> tristate "Keyboard blink driver"
> 
> ...drivers are not expected to act on their own. I was expecting to
> get nice /sys/class/led* interface to my keyboard leds.

What's the benefit of such an interface? If you're able to trigger
keyboard LEDs via that interface, you're also able to use the ioctl()
on /dev/console.

I think the intention of the blink driver was to have a *early* blink,
i.e. before initrd (and on systems without intrd, before the first
init script runs).



Thanks,
   Bernhard
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