http://bugzilla.kernel.org/show_bug.cgi?id=7012
Summary: acpi-cpufreq not working on Dothan C-0
Kernel Version: 2.6.18-rc4-gkh1
Status: NEW
Severity: normal
Owner: [EMAIL PROTECTED]
Submitter: [EMAIL PROTECTED]
Most recent kernel where this bug did not occur: 2.6.15
Distribution: Debian testing/unstable
Hardware Environment: IBM Thinkpad T43
Problem Description:
I reported in bug #6474 that acpi-cpufreq did not work anymore since 2.6.15-mm2
and 2.6.16. The bug has been closed on June 5th with the reason "All ACPI
related things have been removed from the speedstep-centrino driver and added to
the acpi-cpiufreq one. acpi-cpufreq now combines MSR and SystemIO
capabilities."
With 2.6.18-rc1, acpi-cpufreq was able to load again, but it did not work. It
seemed to acquire the device but no cpufreq capability seemed to be exported.
speedstep-centrino still worked fine. I reported this on #6474 and was told to
open a new bug. Here we are.
Now, with -rc4-gkh1, acpi-cpufreq fails to load with EINVAL. I tracked down the
EINVAL to the following code in acpi_processor_preregister_performance() in
drivers/acpi/processor_perflib.c:636:
pr->performance = performance[i];
cpu_set(i, pr->performance->shared_cpu_map);
if (acpi_processor_get_psd(pr)) {
retval = -EINVAL;
continue;
}
acpi_processor_get_psd() seems to fail at:
status = acpi_evaluate_object(pr->handle, "_PSD", NULL, &buffer);
if (ACPI_FAILURE(status)) {
return -ENODEV;
}
Debugging ACPI further more looks hard to me, so I'd rather get some feedback
first since there might be an obvious reason.
According to x86info, my processor is:
Family: 6 Model: 13 Stepping: 8 Type: 0 Brand: 6
CPU Model: (Dothan) [C-0]
/proc/cpuinfo says:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 1.86GHz
stepping : 8
cpu MHz : 1862.104
cache size : 2048 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx est tm2
bogomips : 3727.70
My BIOS is supposed to be uptodate.
I will attach dmesg.
Thank you in advance
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