New: Oops on boot from laptop mode writing to /proc/acpi/processor/CPU0/throttling

Bugme-new Andrew Morton 1 participant 1 message Jan 14, 2008 1 message not in the archive ACPI

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Andrew Morton

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2008-01-14 21:26 UTC #1 lore raw

Quoted 31 lines · On Mon, 14 Jan 2008 11:19:42 -0800 (PST) [email protected] 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: [email protected]
        ReportedBy: [email protected]
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.

Quoted 6 lines

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.