mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
82 lines
2.7 KiB
Plaintext
82 lines
2.7 KiB
Plaintext
|
Kernel driver nouveau
|
||
|
|
===================
|
||
|
|
|
||
|
|
Supported chips:
|
||
|
|
* NV43+
|
||
|
|
|
||
|
|
Authors: Martin Peres (mupuf) <martin.peres@labri.fr>
|
||
|
|
|
||
|
|
Description
|
||
|
|
---------
|
||
|
|
|
||
|
|
This driver allows to read the GPU core temperature, drive the GPU fan and
|
||
|
|
set temperature alarms.
|
||
|
|
|
||
|
|
Currently, due to the absence of in-kernel API to access HWMON drivers, Nouveau
|
||
|
|
cannot access any of the i2c external monitoring chips it may find. If you
|
||
|
|
have one of those, temperature and/or fan management through Nouveau's HWMON
|
||
|
|
interface is likely not to work. This document may then not cover your situation
|
||
|
|
entirely.
|
||
|
|
|
||
|
|
Temperature management
|
||
|
|
--------------------
|
||
|
|
|
||
|
|
Temperature is exposed under as a read-only HWMON attribute temp1_input.
|
||
|
|
|
||
|
|
In order to protect the GPU from overheating, Nouveau supports 4 configurable
|
||
|
|
temperature thresholds:
|
||
|
|
|
||
|
|
* Fan_boost: Fan speed is set to 100% when reaching this temperature;
|
||
|
|
* Downclock: The GPU will be downclocked to reduce its power dissipation;
|
||
|
|
* Critical: The GPU is put on hold to further lower power dissipation;
|
||
|
|
* Shutdown: Shut the computer down to protect your GPU.
|
||
|
|
|
||
|
|
WARNING: Some of these thresholds may not be used by Nouveau depending
|
||
|
|
on your chipset.
|
||
|
|
|
||
|
|
The default value for these thresholds comes from the GPU's vbios. These
|
||
|
|
thresholds can be configured thanks to the following HWMON attributes:
|
||
|
|
|
||
|
|
* Fan_boost: temp1_auto_point1_temp and temp1_auto_point1_temp_hyst;
|
||
|
|
* Downclock: temp1_max and temp1_max_hyst;
|
||
|
|
* Critical: temp1_crit and temp1_crit_hyst;
|
||
|
|
* Shutdown: temp1_emergency and temp1_emergency_hyst.
|
||
|
|
|
||
|
|
NOTE: Remember that the values are stored as milli degrees Celcius. Don't forget
|
||
|
|
to multiply!
|
||
|
|
|
||
|
|
Fan management
|
||
|
|
------------
|
||
|
|
|
||
|
|
Not all cards have a drivable fan. If you do, then the following HWMON
|
||
|
|
attributes should be available:
|
||
|
|
|
||
|
|
* pwm1_enable: Current fan management mode (NONE, MANUAL or AUTO);
|
||
|
|
* pwm1: Current PWM value (power percentage);
|
||
|
|
* pwm1_min: The minimum PWM speed allowed;
|
||
|
|
* pwm1_max: The maximum PWM speed allowed (bypassed when hitting Fan_boost);
|
||
|
|
|
||
|
|
You may also have the following attribute:
|
||
|
|
|
||
|
|
* fan0_input: Speed in RPM of your fan.
|
||
|
|
|
||
|
|
Your fan can be driven in different modes:
|
||
|
|
|
||
|
|
* 0: The fan is left untouched;
|
||
|
|
* 1: The fan can be driven in manual (use pwm1 to change the speed);
|
||
|
|
* 2; The fan is driven automatically depending on the temperature.
|
||
|
|
|
||
|
|
NOTE: Be sure to use the manual mode if you want to drive the fan speed manually
|
||
|
|
|
||
|
|
NOTE2: Not all fan management modes may be supported on all chipsets. We are
|
||
|
|
working on it.
|
||
|
|
|
||
|
|
Bug reports
|
||
|
|
---------
|
||
|
|
|
||
|
|
Thermal management on Nouveau is new and may not work on all cards. If you have
|
||
|
|
inquiries, please ping mupuf on IRC (#nouveau, freenode).
|
||
|
|
|
||
|
|
Bug reports should be filled on Freedesktop's bug tracker. Please follow
|
||
|
|
http://nouveau.freedesktop.org/wiki/Bugs
|