linux-kernel - Re: [PATCH RESEND] Fix reboot regression on Acer Aspire One AOA110

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Date:	Mon, 5 Dec 2011 12:20:05 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Chubb <peter.chubb@...ta.com.au>
Cc:	Vasily Khoruzhick <anarsoul@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Don Zickus <dzickus@...hat.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	Uroš Vampl <mobile.leecher@...il.com>
Subject: Re: [PATCH RESEND] Fix reboot regression on Acer Aspire One AOA110


* Peter Chubb <peter.chubb@...ta.com.au> wrote:

> >>>>> "Vasily" == Vasily Khoruzhick <anarsoul@...il.com> writes:
> 
> Vasily> From: Uroš Vampl <mobile.leecher@...il.com> Starting with
> Vasily> kernel 3.0, my Acer Aspire One AOA110 hangs on reboot. Doing
> Vasily> an internet search, I found that in git commit
> Vasily> b49c78d4827be8d7e67e5b94adac6b30a4a9ad14 the machine was made
> Vasily> to reboot with the bios method, but it does not work on most
> Vasily> (all?) AOA110s.
> 
> That change was made in July to fix the broken ACPI reboot method.  It
> certainly works on my AOA110.  What BIOS do you have installed?
> (although looking at what's been published, I can't see any booting
> problems mentioned in the BIOS changelogs).
> 
> Vasily> This patch introduces new quirks section for machines that
> Vasily> only reboot with the kbd method and put the Aspire One into
> Vasily> it.
> 
> You don't need yet another table, just change the callback.
> 
> 
> Try this:
> 
> Index: linux-2.6/arch/x86/kernel/reboot.c
> ===================================================================
> --- linux-2.6.orig/arch/x86/kernel/reboot.c	2011-10-31 14:35:50.105623537 +1100
> +++ linux-2.6/arch/x86/kernel/reboot.c	2011-11-03 11:54:12.487901547 +1100
> @@ -124,7 +124,7 @@
>   */
>  
>  /*
> - * Some machines require the "reboot=b"  commandline option,
> + * Some machines require the "reboot=b" or "reboot=k"  commandline options,
>   * this quirk makes that automatic.
>   */
>  static int __init set_bios_reboot(const struct dmi_system_id *d)
> @@ -136,6 +136,15 @@
>  	return 0;
>  }
>  
> +static int __init set_kbd_reboot(const struct dmi_system_id *d)
> +{
> +	if (reboot_type != BOOT_KBD) {
> +		reboot_type = BOOT_KBD;
> +		printk(KERN_INFO "%s series board detected. Selecting KBD-method for reboots.\n", d->ident);
> +	}
> +	return 0;
> +}
> +
>  static struct dmi_system_id __initdata reboot_dmi_table[] = {
>  	{	/* Handle problems with rebooting on Dell E520's */
>  		.callback = set_bios_reboot,
> @@ -295,7 +304,7 @@
>  		},
>  	},
>  	{ /* Handle reboot issue on Acer Aspire one */
> -		.callback = set_bios_reboot,
> +		.callback = set_kbd_reboot,
>  		.ident = "Acer Aspire One A110",
>  		.matches = {
>  			DMI_MATCH(DMI_SYS_VENDOR, "Acer"),

Looks like this patch worked fine for everyone affected?

If yes then please resend it with a Signed-off-by, and with the 
proper Reported-by and Tested-by tags.

Thanks,

	Ingo
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