Bug 20422

Summary:	scaling_max_freq stuck at 600000 - Dell Inspiron 8600
Product:	ACPI	Reporter:	lionel jousset (lionel.jousset)
Component:	Other	Assignee:	acpi_other
Status:	REJECTED INSUFFICIENT_DATA
Severity:	normal	CC:	lenb, rui.zhang, yakui.zhao
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.35/36	Subsystem:
Regression:	Yes	Bisected commit-id:
Attachments:	Output of cpuinfo, cpufreq-info, lspci, modules and ioports.

Description lionel jousset 2010-10-16 22:38:23 UTC

Created attachment 33772 [details]
Output of cpuinfo, cpufreq-info, lspci, modules and ioports.

Hi,
I'm running an ubuntu 10.10 on my laptop Inspiron 8600,
it doesn't scale its cpu frequency, that's "current policy" in cpufreq-info wich is wrong:
"current policy: frequency should be within 600 MHz and 600 MHz."
the cpu is is blocked to 600 MHz and "cpufreq-set" can set anything.
I try to fix it in /etc/sysfs.conf but no way...
It doesn't work with kernel 2.6.35 but I have tested too the kernel found on:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.36-rc7-maverick/
(http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2010-10-16-maverick/ also)

The lastest bios was already on board and I ran a live cd 
ubuntu 10.4 with 2.6.32-24 kernel and frequency scaling worked well.

In the attachment, there is cpuinfo, cpufreq-info, lspci, modules and ioports.
I hope that it will help.

Thanks.
Lionel

Comment 1 lionel jousset 2010-10-16 22:51:06 UTC

the output of "grep . /sys/devices/system/cpu/cpu0/cpufreq/*"
gave:
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq:1700000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq:600000
/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency:10000
/sys/devices/system/cpu/cpu0/cpufreq/related_cpus:0
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies:1700000 1600000 1400000 1200000 1000000 800000 600000 
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors:conservative ondemand userspace powersave performance 
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq:600000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver:acpi-cpufreq
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:ondemand
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:600000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq:600000
/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed:<unsupported>


scaling_setspeed:<unsupported>
in fact I don't know if my bug report is at the right place.

Lionel

Comment 2 ykzhao 2010-10-19 00:52:41 UTC

Will you please add the boot option of "cpufreq.debug=0x07" and attach the output of dmesg?
Please also attach the output of acpidump, /proc/cpuinfo.

Thanks.

Comment 3 Zhang Rui 2010-10-19 01:33:02 UTC

> /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq:600000

someone sets the cpu p-state limit.

what's the kernel version of ubuntu 10.10? there should be a "bios_limit" file at /sys/devices/system/cpu/cpu0/cpufreq/.

does the problem still exists if you build in the processor driver and boot with processor.ignore_ppc?

Comment 4 Zhang Rui 2010-10-29 07:05:29 UTC

ping...

Comment 5 Zhang Rui 2010-11-08 02:27:07 UTC

Bug closed as there is no response from the bug reporter.
Please feel free to re-open it at any time if the problem can be reproduced in the LATEST upstream kernel.