Management of Thermal

[Norberto Meijome]

On Mon, 08 Oct 2007 11:16:01 +0200
Lars Engels <lme at FreeBSD.org> wrote:

> your temperature values are a little bit too high. On my Notebook
> (model name      : Intel(R) Pentium(R) M processor 1.73GHz) the CPU is  
> at between 50°C - 60°C when I use normal desktop applications and up  
> to 80°C when I compile something.

hi again, Lars,

No luck. I commented out:
cpufreq_load="YES"

from /boot/loader.conf.local

and added 
powerd_flags="-a adaptive -b adaptive"

to my rc.conf (I already had powerd_enable="YES".

I rebooted the computer and went to the garage to get something. I came back
after what must have been less than 5 minutes. I saw GDM close and the laptop
shut down with CRIT temperature alert.:

Oct  8 20:14:30 ayiin root: WARNING: system temperature too high, shutting down soon!
Oct  8 20:14:40 ayiin kernel: acpi_tz0: WARNING - current temperature (99.0C) exceeds safe limits

There were a couple of lines about something to do with _thermal, but it was in
full shutdown mode and couldn't catch them. they are not showing in the logs.
/var/log/messages shows the machine was up for under 2 minutes. I don't run
anything on boot that will burn CPU (seti,etc... only on request, it was
definitely not running)

> You could open your case and look if there's dust in the airflow so  
> the fans cannot blow out all the hot air.

well, i can barely hear the fans at all. I am not sure if this is how it's
supposed to be for Thinkpads... I will check regardles... but it seems to work
somewhat (i'm down to 57C now...)

> I only use the powerd with "-a adaptive -b adaptive" flags. There  
> should be no need for the cpufreq module.

I am running it now again with cpufreq and powerd, with the flags as you show.
my current sysctl reports

$ sysctl hw.acpi
hw.acpi.supported_sleep_state: S3 S4 S5
hw.acpi.power_button_state: S5
hw.acpi.sleep_button_state: S3
hw.acpi.lid_switch_state: NONE
hw.acpi.standby_state: S1
hw.acpi.suspend_state: S3
hw.acpi.sleep_delay: 1
hw.acpi.s4bios: 0
hw.acpi.verbose: 0
hw.acpi.disable_on_reboot: 0
hw.acpi.handle_reboot: 0
hw.acpi.reset_video: 1
hw.acpi.cpu.cx_lowest: C1
hw.acpi.thermal.min_runtime: 0
hw.acpi.thermal.polling_rate: 10
hw.acpi.thermal.user_override: 0
hw.acpi.thermal.tz0.temperature: 60.0C
hw.acpi.thermal.tz0.active: -1
hw.acpi.thermal.tz0.passive_cooling: 1
hw.acpi.thermal.tz0.thermal_flags: 0
hw.acpi.thermal.tz0._PSV: 94.5C
hw.acpi.thermal.tz0._HOT: -1
hw.acpi.thermal.tz0._CRT: 99.0C
hw.acpi.thermal.tz0._ACx: -1 -1 -1 -1 -1 -1 -1 -1 -1 -1
hw.acpi.battery.life: 98
hw.acpi.battery.time: -1
hw.acpi.battery.state: 0
hw.acpi.battery.units: 1
hw.acpi.battery.info_expire: 5
hw.acpi.acline: 1

$ sysctl dev.cpu  
dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU_
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 500
dev.cpu.0.freq_levels: 2000/27000 1750/23625 1600/22600 1400/19775 1333/19666 1166/17207 1066/16733 932/14641 800/13800 700/12075 600/10350 500/8625 400/6900 300/5175 200/3450 100/1725
dev.cpu.0.cx_supported: C1/1 C2/1 C3/85
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00% 0.00% 0.00%

related parts from dmesg:

Oct  8 20:18:28 ayiin kernel: CPU: Intel(R) Pentium(R) M processor 2.00GHz (1995.01-MHz 686-class CPU)
Oct  8 20:18:28 ayiin kernel: Origin = "GenuineIntel"  Id = 0x6d8  Stepping = 8
Oct  8 20:18:28 ayiin kernel: Features=0xafe9fbff<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>
Oct  8 20:18:28 ayiin kernel: Features2=0x180<EST,TM2>
Oct  8 20:18:28 ayiin kernel: real memory  = 1609433088 (1534 MB)
Oct  8 20:18:28 ayiin kernel: avail memory = 1567961088 (1495 MB)
Oct  8 20:18:28 ayiin kernel: wlan: mac acl policy registered
Oct  8 20:18:28 ayiin kernel: kqemu version 0x00010300
Oct  8 20:18:28 ayiin kernel: kqemu: KQEMU installed, max_locked_mem=781488kB.
Oct  8 20:18:28 ayiin kernel: acpi0: <IBM TP-77> on motherboard
Oct  8 20:18:28 ayiin kernel: acpi_ec0: <Embedded Controller: GPE 0x1c, ECDT> port 0x62,0x66 on acpi0
Oct  8 20:18:28 ayiin kernel: acpi0: Power Button (fixed)
Oct  8 20:18:28 ayiin kernel: Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
Oct  8 20:18:28 ayiin kernel: acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
Oct  8 20:18:28 ayiin kernel: cpu0: <ACPI CPU> on acpi0
Oct  8 20:18:28 ayiin kernel: est0: <Enhanced SpeedStep Frequency Control> on cpu0
Oct  8 20:18:28 ayiin kernel: p4tcc0: <CPU Frequency Thermal Control> on cpu0
Oct  8 20:18:28 ayiin kernel: acpi_lid0: <Control Method Lid Switch> on acpi0
Oct  8 20:18:28 ayiin kernel: acpi_button0: <Sleep Button> on acpi0
Oct  8 20:18:28 ayiin kernel: pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
Oct  8 20:18:28 ayiin kernel: pci0: <ACPI PCI bus> on pcib0
Oct  8 20:18:28 ayiin kernel: pcib1: <ACPI PCI-PCI bridge> irq 11 at device 1.0 on pci0
Oct  8 20:18:28 ayiin kernel: pci1: <ACPI PCI bus> on pcib1
Oct  8 20:18:28 ayiin kernel: drm0: <ATI Radeon Mobility X600 M24> port 0x2000-0x20ff mem 0xc8000000-0xcfffffff,0xb0100000-0xb010ffff irq 11 at device 0.0 on pci1
Oct  8 20:18:28 ayiin kernel: info: [drm] Initialized radeon 1.25.0 20060524


I am happy to keep trying / digging / getting some logging happening of
temperature and... system load/cpu frequency? not sure what would be useful.

Things i was thinking could help with this is tweaking of the _ACx and C1
values... but i'm not sure how to go about them...

Not sure if it's relevant, but i have APIC disabled (ACPI is on, APIC is off).

I'm happy to RTFM....but i don't know where that is :)

cheers,
B
_________________________
{Beto|Norberto|Numard} Meijome

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