linux-kernel - Re: [Bugme-new] [Bug 8378] New: Averatec 3156X laptop doesn't reboot with kernels

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Date:	Thu, 1 Nov 2007 11:50:31 -0400
From:	Aristeu Rozanski <aris@...vo.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Truxton Fulton <trux@...xton.com>,
	Hiroto Shibuya <hiroto.shibuya@...il.com>,
	Lee Garrett <lee-in-berlin@....de>,
	linux-kernel@...r.kernel.org,
	"bugme-daemon@...nel-bugs.osdl.org" 
	<bugme-daemon@...zilla.kernel.org>, ak@...e.de, torvalds@...l.org
Subject: Re: [Bugme-new] [Bug 8378] New: Averatec 3156X laptop doesn't
	reboot with kernels > 2.6.13.5 (responsible commit found)

Hi Andrew,
> > OK, thanks.
> > 
> > So that are we doing here?  We try the pre-Truxton code and if that didn't
> > work we try the post-Truxton code?  Hard to see how that could go wrong.
> > 
> > Truxton, can you please test it for us?
> 
> Hiroto Shibuya wrote to tell me that he has a VIA EPIA-EK10000
> which suffers from the reboot problem when no keyboard is attached.
> My first patch works for him :
> 
>   http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=59f4e7d572980a521b7bdba74ab71b21f5995538
> 
> But the latest patch does not work for him :
> 
>   http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8b93789808756bcc1e5c90c99f1b1ef52f839a51
> 
> We found that it was necessary to also set the "disable keyboard"
> flag in the command byte, as the first patch was doing.  The
> second patch tries to minimally modify the command byte, but
> it is not enough.
> 
> Please consider this simple one-line patch to help people with
> low end VIA motherboards reboot when no keyboard is attached.
> Hiroto Shibuya has verified that this works for him (as I
> no longer have an afflicted machine) :
> 
> This patch is against linux-2.6.23-rc9/include/asm-i386/mach-default/mach_reboot.h
> 
> --- mach_reboot.h       Mon Oct  1 20:24:52 2007
> +++ mach_reboot.h.new   Tue Oct  2 19:22:13 2007
> @@ -49,7 +49,7 @@
>                 udelay(50);
>                 kb_wait();
>                 udelay(50);
> -               outb(cmd | 0x04, 0x60); /* set "System flag" */
> +               outb(cmd | 0x14, 0x60); /* set "System flag" and "Keyboard Disabled" */
>                 udelay(50);
>                 kb_wait();
>                 udelay(50);
> 
> 
any chance to get this into next -mm?

-- 
Aristeu

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