On Fri, 09 Apr 2010 11:17:33 +0200, Jean Delvare <khali@xxxxxxxxxxxx>
wrote:
On Thu, 08 Apr 2010 18:36:34 +0200, dienet wrote:
I was using 2.6.31.4 for quite some time - it works OK.
Command 'sensor' that gives me temperature on my C2D, was saying that
cores have around 28-45 deg (min and maxs on normal day work)
Now on 2.6.33.1 sensors gives temperatures around 32-48 deg. I never
seen
29 or below. No room temperature is changing (got two kernels installed,
so I can change it quickly)
Who is telling the truth here? Was there any works on coretemp module
since 2.6.31.4 that made the change in read-out?
There were some changes to the coretemp driver in 2.6.32 and 2.6.33,
but these shouldn't affect older CPU models and would also not change
the readout by a few degrees. You can check if the high temperature
limit is the same - then you can assume the driver changes did not
affect your system.
On 2.6.31.4:
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +33.0°C (high = +100.0°C, crit = +100.0°C)
coretemp-isa-0001
Adapter: ISA adapter
Core 1: +33.0°C (high = +100.0°C, crit = +100.0°C)
On 2.6.33.1:
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +34.0°C (high = +105.0°C, crit = +105.0°C)
coretemp-isa-0001
Adapter: ISA adapter
Core 1: +34.0°C (high = +105.0°C, crit = +105.0°C)
So there is a 5 deg diffrance. I did not change any config files.
I think that because that temp. change fan is working more often.
I'm using Lenovo ThinkPad T61.
This suggests that the temperature increase is real and this isn't just
a reporting issue. I suggest that you check
in /proc/acpi/processor/*/power, the amount of time spent in C2 and C3
states. Also install powertop and run it on both kernels, see if 2.6.33
has more frequent wake-ups than 2.6.31.
On 2.6.31.4 powertop says:
C3 - 90, 7% of the time
P (800MHz) - 98%
Wakeups: 627
On 2.6.33.1 powertop says:
C3 - 93% of the time
P (800MHz) - 98%
Wakeups: 556
Was running the same programs. Kernel 2.6.33.1 was running for about 1h.
I'm asuming that /proc/acpi/processor/*/power is used by powertop so I'm
not paseting it. But it also says that C3 is more often used then others.
--
pozdr0
dienet
"Old C programmers never die. They're just cast into void."
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