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Rikz
Tux's lil' helper
Joined: 06 Oct 2003
Posts: 103
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 Posted: Mon Aug 06, 2007 7:11 am Post subject: CPU cooler always at full speed |
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I'm using gentoo-sources-2.6.22-r1. Kernel is configured to support thermal zones and fan:
| Code: | # zcat /proc/config.gz |grep ACPI
# Power management options (ACPI, APM)
# ACPI (Advanced Configuration and Power Interface) Support
CONFIG_ACPI=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_SLEEP_PROC_FS=y
# CONFIG_ACPI_SLEEP_PROC_SLEEP is not set
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_AC=m
CONFIG_ACPI_BATTERY=m
CONFIG_ACPI_BUTTON=m
CONFIG_ACPI_FAN=m
# CONFIG_ACPI_DOCK is not set
CONFIG_ACPI_PROCESSOR=m
CONFIG_ACPI_THERMAL=m
# CONFIG_ACPI_ASUS is not set
# CONFIG_ACPI_TOSHIBA is not set
CONFIG_ACPI_BLACKLIST_YEAR=0
CONFIG_ACPI_DEBUG=y
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
# CONFIG_ACPI_CONTAINER is not set
# CONFIG_ACPI_SBS is not set
CONFIG_X86_ACPI_CPUFREQ=m
# CONFIG_X86_ACPI_CPUFREQ_PROC_INTF is not set
CONFIG_PNPACPI=y
# CONFIG_THINKPAD_ACPI is not set
CONFIG_ATA_ACPI=y
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/proc/acpi contains 'fan' and 'thermal_zone' directories:
| Code: | # LANG=C ls -lR fan/ thermal_zone/
fan/:
total 0
dr-xr-xr-x 2 root root 0 Aug 6 09:54 FAN
fan/FAN:
total 0
-rw-r--r-- 1 root root 0 Aug 6 10:07 state
thermal_zone/:
total 0
dr-xr-xr-x 2 root root 0 Aug 6 09:35 THRM
thermal_zone/THRM:
total 0
-rw-r--r-- 1 root root 0 Aug 6 10:07 cooling_mode
-rw-r--r-- 1 root root 0 Aug 6 10:07 polling_frequency
-r--r--r-- 1 root root 0 Aug 6 10:07 state
-r--r--r-- 1 root root 0 Aug 6 10:07 temperature
-rw-r--r-- 1 root root 0 Aug 6 10:07 trip_points
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'cat /proc/acpi/fan/FAN/state' always show "status: on"
even if I do 'echo -n "3" > /proc/acpi/fan/FAN/state' the fan is still running at full speed.
/proc/acpi/thermal_zone/THRM/ contents:
| Code: | # cat cooling_mode
0 - Active; 1 - Passive
# cat polling_frequency
<polling disabled>
# cat state
state: ok
# cat temperature
temperature: 39 C
# cat trip_points
critical (S5): 110 C
passive: 78 C: tc1=3 tc2=1 tsp=80 devices=CPU0
active[0]: 60 C: devices= FAN
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So, the CPU is quiet cool, its state is 'ok' but the fan is too active.
As for 2.6.22 kernel, ACPI team decided to make trip_points read-only and I can't edit this options now.
'echo -n "1" > cooling_mode' does nothing for me.
Here is a recent post to LKML about trip_points: http://lkml.org/lkml/2007/8/2/56 - but still no real progress, only words.
Any suggestions on how to use passive cooling? |
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Wojtek_
Guru
Joined: 28 May 2006
Posts: 397
Location: London
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| Posted: Mon Aug 06, 2007 9:22 am Post subject: |
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Does it also happen when you run Windows? If yes then it might be a bios issue - try updating it. I have a Fujitsu Siemens laptop and have encountered a similar problem - I solved it by updating bios.
Cheers,
Wojtek
_________________
Fujitsu-Siemens Amilo Xi-1546
Intel Centrino Duo T2600 (2,16GHz)
2x1GB DDR2 RAM
ATi Mobility Radeon X1800 256MB DDR3
2x120GB HDD
Intel High Definition Audio |
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toralf
Developer
Joined: 01 Feb 2004
Posts: 3943
Location: Hamburg
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Rikz
Tux's lil' helper
Joined: 06 Oct 2003
Posts: 103
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| Posted: Mon Aug 06, 2007 6:10 pm Post subject: |
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| Wojtek_ wrote: | Does it also happen when you run Windows? If yes then it might be a bios issue - try updating it. I have a Fujitsu Siemens laptop and have encountered a similar problem - I solved it by updating bios.
Cheers,
Wojtek |
Windows slows down the cooler when the temperature is low.
My BIOS is the latest available from FIC site. I posted a link above - yes, it's a kind of a BIOS bug, but kernel must handle it properly. Looks like I have to submit a post to kernel bugzilla.
toralf: this two problems look the same but the content of /proc/acpi/thermal_zone/ slightly differs. And ondemand cpufreq governer doesn't solve the problem. |
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