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96 lines
2.8 KiB
96 lines
2.8 KiB
===================== |
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Kernel driver nouveau |
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===================== |
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Supported chips: |
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* NV43+ |
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Authors: Martin Peres (mupuf) <[email protected]> |
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Description |
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----------- |
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This driver allows to read the GPU core temperature, drive the GPU fan and |
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set temperature alarms. |
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Currently, due to the absence of in-kernel API to access HWMON drivers, Nouveau |
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cannot access any of the i2c external monitoring chips it may find. If you |
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have one of those, temperature and/or fan management through Nouveau's HWMON |
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interface is likely not to work. This document may then not cover your situation |
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entirely. |
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Temperature management |
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---------------------- |
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Temperature is exposed under as a read-only HWMON attribute temp1_input. |
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In order to protect the GPU from overheating, Nouveau supports 4 configurable |
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temperature thresholds: |
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* Fan_boost: |
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Fan speed is set to 100% when reaching this temperature; |
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* Downclock: |
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The GPU will be downclocked to reduce its power dissipation; |
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* Critical: |
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The GPU is put on hold to further lower power dissipation; |
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* Shutdown: |
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Shut the computer down to protect your GPU. |
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WARNING: |
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Some of these thresholds may not be used by Nouveau depending |
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on your chipset. |
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The default value for these thresholds comes from the GPU's vbios. These |
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thresholds can be configured thanks to the following HWMON attributes: |
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* Fan_boost: temp1_auto_point1_temp and temp1_auto_point1_temp_hyst; |
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* Downclock: temp1_max and temp1_max_hyst; |
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* Critical: temp1_crit and temp1_crit_hyst; |
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* Shutdown: temp1_emergency and temp1_emergency_hyst. |
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NOTE: Remember that the values are stored as milli degrees Celsius. Don't forget |
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to multiply! |
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Fan management |
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-------------- |
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Not all cards have a drivable fan. If you do, then the following HWMON |
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attributes should be available: |
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* pwm1_enable: |
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Current fan management mode (NONE, MANUAL or AUTO); |
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* pwm1: |
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Current PWM value (power percentage); |
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* pwm1_min: |
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The minimum PWM speed allowed; |
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* pwm1_max: |
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The maximum PWM speed allowed (bypassed when hitting Fan_boost); |
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You may also have the following attribute: |
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* fan1_input: |
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Speed in RPM of your fan. |
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Your fan can be driven in different modes: |
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* 0: The fan is left untouched; |
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* 1: The fan can be driven in manual (use pwm1 to change the speed); |
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* 2; The fan is driven automatically depending on the temperature. |
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NOTE: |
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Be sure to use the manual mode if you want to drive the fan speed manually |
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NOTE2: |
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When operating in manual mode outside the vbios-defined |
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[PWM_min, PWM_max] range, the reported fan speed (RPM) may not be accurate |
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depending on your hardware. |
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Bug reports |
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----------- |
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Thermal management on Nouveau is new and may not work on all cards. If you have |
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inquiries, please ping mupuf on IRC (#nouveau, OFTC). |
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Bug reports should be filled on Freedesktop's bug tracker. Please follow |
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https://nouveau.freedesktop.org/wiki/Bugs
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