https://bugzilla.kernel.org/show_bug.cgi?id=42725


George B. <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]




--- Comment #78 from George B. <[email protected]>  2012-08-29 10:49:00 ---
Hello,

I think I also have this problem on my Dell Precision M4600 laptop.
---
processor       : 7
vendor_id       : GenuineIntel
cpu family      : 6
model           : 42
model name      : Intel(R) Core(TM) i7-2820QM CPU @ 2.30GHz
stepping        : 7
microcode       : 0x23
cpu MHz         : 800.000
---

(There are 8 cores in total, all limited to 800MHz).

cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_min_freq
---
800000
800000
800000
800000
800000
800000
800000
800000
---

cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_max_freq
---
2301000
2301000
2301000
2301000
2301000
2301000
2301000
2301000
---

cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq
---
800000
800000
800000
800000
800000
800000
800000
800000
---

cpuinfo_cur_freq remains the same even when I put 100% load on the cores.

In my case I do not appear to have the thermal throttling mentioned in comment
#61:
grep . /sys/class/thermal/*/* 2>/dev/null
/sys/class/thermal/cooling_device0/cur_state:0
/sys/class/thermal/cooling_device0/max_state:10
/sys/class/thermal/cooling_device0/type:Processor
/sys/class/thermal/cooling_device1/cur_state:0
/sys/class/thermal/cooling_device1/max_state:10
/sys/class/thermal/cooling_device1/type:Processor
/sys/class/thermal/cooling_device2/cur_state:0
/sys/class/thermal/cooling_device2/max_state:10
/sys/class/thermal/cooling_device2/type:Processor
/sys/class/thermal/cooling_device3/cur_state:0
/sys/class/thermal/cooling_device3/max_state:10
/sys/class/thermal/cooling_device3/type:Processor
/sys/class/thermal/cooling_device4/cur_state:0
/sys/class/thermal/cooling_device4/max_state:10
/sys/class/thermal/cooling_device4/type:Processor
/sys/class/thermal/cooling_device5/cur_state:0
/sys/class/thermal/cooling_device5/max_state:10
/sys/class/thermal/cooling_device5/type:Processor
/sys/class/thermal/cooling_device6/cur_state:0
/sys/class/thermal/cooling_device6/max_state:10
/sys/class/thermal/cooling_device6/type:Processor
/sys/class/thermal/cooling_device7/cur_state:0
/sys/class/thermal/cooling_device7/max_state:10
/sys/class/thermal/cooling_device7/type:Processor
/sys/class/thermal/cooling_device8/cur_state:0
/sys/class/thermal/cooling_device8/max_state:15
/sys/class/thermal/cooling_device8/type:LCD
/sys/class/thermal/thermal_zone0/mode:enabled
/sys/class/thermal/thermal_zone0/passive:0
/sys/class/thermal/thermal_zone0/temp:25000
/sys/class/thermal/thermal_zone0/trip_point_0_temp:107000
/sys/class/thermal/thermal_zone0/trip_point_0_type:critical
/sys/class/thermal/thermal_zone0/type:acpitz
---

Kernel version is 3.2.0-3-amd64 (Debian Sid).

Please let me know what additional information you need to troubleshoot and fix
this - I will be happy to help.


Thanks,

George

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