linux-kernel - Re: [BUG] Fans keep running, first found since v2.6.38-rc7

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Date:	Fri, 11 Mar 2011 12:38:39 +0100
From:	Andreas Herrmann <herrmann.der.user@...glemail.com>
To:	Wang Lei <f3d27b@...il.com>
Cc:	Andreas Herrmann <andreas.herrmann3@....com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>
Subject: Re: [BUG] Fans keep running, first found since v2.6.38-rc7

On Fri, Mar 11, 2011 at 06:47:34PM +0800, Wang Lei wrote:
> Hi Andreas,
> 
> Thanks for your reply.
> 
> Andreas Herrmann <andreas.herrmann3@....com> writes:
> 
> > Hi Lei,
> >
> > can you please provide information, which system you are using.  dmesg
> > (please use apic=debug kernel parameter), output of lspci -nnxxxx (as
> > root),
> >
> 
> I'm using debian sid with customized kernel. dmesg and lspci are
> attached. 

> Initializing cgroup subsys cpuset
> Initializing cgroup subsys cpu
> Linux version 2.6.38-rc6+ (root@...alhost) (gcc version 4.4.5 (Debian 4.4.5-12) ) #1 SMP Fri Feb 25 20:01:40 CST 2011
> Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.38-rc6+ root=/dev/sda1 ro apic=debug

So that was the good case (all working as expected).

>  BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
>  BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
>  BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
>  BIOS-e820: 0000000000100000 - 0000000097fb0000 (usable)
>  BIOS-e820: 0000000097fb0000 - 0000000097fc8000 (reserved)
>  BIOS-e820: 0000000097fc8000 - 0000000097fe7fb8 (ACPI NVS)
>  BIOS-e820: 0000000097fe7fb8 - 00000000a0000000 (reserved)
>  BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
>  BIOS-e820: 00000000fec00000 - 00000000fec02000 (reserved)
>  BIOS-e820: 00000000ffbc0000 - 00000000ffcc0000 (reserved)
>  BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)
> NX (Execute Disable) protection: active
> DMI 2.4 present.
> DMI: Hewlett-Packard HP Compaq 6515b (GL087PA#AB2)/30C2, BIOS 68YTT Ver. F.05 04/26/2007

                       ^^^^^^^^^^^^^^^

Hmm, I thought that this might be the case.

Can you please try to boot -rc7 with kernel parameter acpi_skip_timer_override
and send the same output (dmesg again also with apic=debug and lspci -nnxxxx)


Thanks,

Andreas

PS: My assumption is that the patch in -rc7 leads to usage of IO-APIC
    pin2 for timer interrupt (potentially I have broken chipset
    revision determination for some SB600.)
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