Re: [Bugme-new] [Bug 9747] New: Oops on boot from laptop mode writing to /proc/acpi/processor/CPU0/throttling

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On Mon, 14 Jan 2008 11:19:42 -0800 (PST)
bugme-daemon@xxxxxxxxxxxxxxxxxxx wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=9747
> 
>            Summary: Oops on boot from laptop mode writing to
>                     /proc/acpi/processor/CPU0/throttling
>            Product: ACPI
>            Version: 2.5
>      KernelVersion: 2.6.24-rc7
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Config-Processors
>         AssignedTo: acpi_config-processors@xxxxxxxxxxxxxxxxxxxx
>         ReportedBy: huggie@xxxxxxxx
> 
> 
> Latest working kernel version: Unsure.  Later than 2.6.24-rc2
> Earliest failing kernel version: 2.6.24-rc6 (possibly earlier)
> Distribution: Debian
> Hardware Environment: Toshiba Portege r500
> Software Environment:
> Problem Description:
> 
> When I boot laptop-mode fires up and tries to write to
> /proc/acpi/processor/CPU0/throttling which contains <not supported>
> 
> I don't quite know what I've done to get it to contain <not supported> but
> anyway that'll be more fun to track down I'm sure.
> 
> In any case, in this configuration I get this oops even if all I do is
> echo stuff >/proc/acpi/processor/CPU0/throttling
> 
> [   32.378673] Unable to handle kernel NULL pointer dereference at
> 0000000000000
> 000 RIP: 

Guys, this is a serious post-2.6.23 regression.
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