Hi!

quoted

4.9-rc2 has bios_limit:

pavel@duo:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/bios_limit
1833000

and it has thermal zones:

/sys/devices/virtual/thermal/thermal_zone0/trip_point_0_temp 127000
/sys/devices/virtual/thermal/thermal_zone0/trip_point_0_type critical
/sys/devices/virtual/thermal/thermal_zone1/trip_point_0_temp 97000
/sys/devices/virtual/thermal/thermal_zone1/trip_point_0_type critical
/sys/devices/virtual/thermal/thermal_zone1/trip_point_1_temp 92500
/sys/devices/virtual/thermal/thermal_zone1/trip_point_1_type passive

It will not act if there is no binding information. Do you have more
files in this folder?

grep -r . * in /sys/class/thermal will be helpful.

Yes, I do. Here you go:

pavel@duo:/data/l/linux$ sudo grep -ri . /sys/class/thermal/*
/sys/class/thermal/cooling_device0/cur_state:0
/sys/class/thermal/cooling_device0/power/runtime_active_kids:0
/sys/class/thermal/cooling_device0/power/runtime_suspended_time:0
grep: /sys/class/thermal/cooling_device0/power/autosuspend_delay_ms:
Input/output error
/sys/class/thermal/cooling_device0/power/runtime_enabled:disabled
/sys/class/thermal/cooling_device0/power/runtime_active_time:0
/sys/class/thermal/cooling_device0/power/control:auto
/sys/class/thermal/cooling_device0/power/async:disabled
/sys/class/thermal/cooling_device0/power/runtime_usage:0
/sys/class/thermal/cooling_device0/power/runtime_status:unsupported
/sys/class/thermal/cooling_device0/type:LCD
/sys/class/thermal/cooling_device0/max_state:7
/sys/class/thermal/cooling_device1/cur_state:0
/sys/class/thermal/cooling_device1/power/runtime_active_kids:0
/sys/class/thermal/cooling_device1/power/runtime_suspended_time:0
grep: /sys/class/thermal/cooling_device1/power/autosuspend_delay_ms:
Input/output error
/sys/class/thermal/cooling_device1/power/runtime_enabled:disabled
/sys/class/thermal/cooling_device1/power/runtime_active_time:0
/sys/class/thermal/cooling_device1/power/control:auto
/sys/class/thermal/cooling_device1/power/async:disabled
/sys/class/thermal/cooling_device1/power/runtime_usage:0
/sys/class/thermal/cooling_device1/power/runtime_status:unsupported
/sys/class/thermal/cooling_device1/type:Processor
/sys/class/thermal/cooling_device1/max_state:10
/sys/class/thermal/cooling_device2/cur_state:0
/sys/class/thermal/cooling_device2/power/runtime_active_kids:0
/sys/class/thermal/cooling_device2/power/runtime_suspended_time:0
grep: /sys/class/thermal/cooling_device2/power/autosuspend_delay_ms:
Input/output error
/sys/class/thermal/cooling_device2/power/runtime_enabled:disabled
/sys/class/thermal/cooling_device2/power/runtime_active_time:0
/sys/class/thermal/cooling_device2/power/control:auto
/sys/class/thermal/cooling_device2/power/async:disabled
/sys/class/thermal/cooling_device2/power/runtime_usage:0
/sys/class/thermal/cooling_device2/power/runtime_status:unsupported
/sys/class/thermal/cooling_device2/type:Processor
/sys/class/thermal/cooling_device2/max_state:10
/sys/class/thermal/thermal_zone0/passive:0
/sys/class/thermal/thermal_zone0/available_policies:step_wise
/sys/class/thermal/thermal_zone0/policy:step_wise
/sys/class/thermal/thermal_zone0/mode:enabled
grep: /sys/class/thermal/thermal_zone0/offset: Input/output error
grep: /sys/class/thermal/thermal_zone0/integral_cutoff: Input/output
error
/sys/class/thermal/thermal_zone0/power/runtime_active_kids:0
/sys/class/thermal/thermal_zone0/power/runtime_suspended_time:0
grep: /sys/class/thermal/thermal_zone0/power/autosuspend_delay_ms:
Input/output error
/sys/class/thermal/thermal_zone0/power/runtime_enabled:disabled
/sys/class/thermal/thermal_zone0/power/runtime_active_time:0
/sys/class/thermal/thermal_zone0/power/control:auto
/sys/class/thermal/thermal_zone0/power/async:disabled
/sys/class/thermal/thermal_zone0/power/runtime_usage:0
/sys/class/thermal/thermal_zone0/power/runtime_status:unsupported
grep: /sys/class/thermal/thermal_zone0/k_d: Input/output error
/sys/class/thermal/thermal_zone0/trip_point_0_type:critical
/sys/class/thermal/thermal_zone0/type:acpitz
grep: /sys/class/thermal/thermal_zone0/slope: Input/output error
grep: /sys/class/thermal/thermal_zone0/k_po: Input/output error
grep: /sys/class/thermal/thermal_zone0/k_i: Input/output error
grep: /sys/class/thermal/thermal_zone0/sustainable_power: Input/output
error
/sys/class/thermal/thermal_zone0/trip_point_0_temp:127000
grep: /sys/class/thermal/thermal_zone0/k_pu: Input/output error
/sys/class/thermal/thermal_zone0/temp:58000
/sys/class/thermal/thermal_zone1/available_policies:step_wise
/sys/class/thermal/thermal_zone1/policy:step_wise
/sys/class/thermal/thermal_zone1/mode:enabled
/sys/class/thermal/thermal_zone1/trip_point_1_type:passive
grep: /sys/class/thermal/thermal_zone1/offset: Input/output error
grep: /sys/class/thermal/thermal_zone1/integral_cutoff: Input/output
error
/sys/class/thermal/thermal_zone1/power/runtime_active_kids:0
/sys/class/thermal/thermal_zone1/power/runtime_suspended_time:0
grep: /sys/class/thermal/thermal_zone1/power/autosuspend_delay_ms:
Input/output error
/sys/class/thermal/thermal_zone1/power/runtime_enabled:disabled
/sys/class/thermal/thermal_zone1/power/runtime_active_time:0
/sys/class/thermal/thermal_zone1/power/control:auto
/sys/class/thermal/thermal_zone1/power/async:disabled
/sys/class/thermal/thermal_zone1/power/runtime_usage:0
/sys/class/thermal/thermal_zone1/power/runtime_status:unsupported
grep: /sys/class/thermal/thermal_zone1/k_d: Input/output error
/sys/class/thermal/thermal_zone1/trip_point_0_type:critical
/sys/class/thermal/thermal_zone1/type:acpitz
/sys/class/thermal/thermal_zone1/cdev1_weight:0
/sys/class/thermal/thermal_zone1/trip_point_1_temp:92500
grep: /sys/class/thermal/thermal_zone1/slope: Input/output error
grep: /sys/class/thermal/thermal_zone1/k_po: Input/output error
grep: /sys/class/thermal/thermal_zone1/k_i: Input/output error
/sys/class/thermal/thermal_zone1/cdev0_weight:0
grep: /sys/class/thermal/thermal_zone1/sustainable_power: Input/output
error
/sys/class/thermal/thermal_zone1/trip_point_0_temp:97000
/sys/class/thermal/thermal_zone1/cdev0_trip_point:1
grep: /sys/class/thermal/thermal_zone1/k_pu: Input/output error
/sys/class/thermal/thermal_zone1/temp:80000
/sys/class/thermal/thermal_zone1/cdev1_trip_point:1

quoted

Hmm. bios_limit does not seem to change, even when the temperature is
clearly above the trip point. (It is also interestng that acpi/ibm
reports bigger temperatures than
/sys/devices/virtual/thermal/thermal_zone1/temp . I have seen 103C
there.)

Probably they are showing package and core temperature or have a
different sampling interval.

Try enabling thermald service in Debian. it has access to more knobs to
control thermals.

Hmm, thanks for the pointer. But it seems like I'll have to build my
own, as /proc/acpi/ibm does not follow the usual infrastructure...

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html