Differences

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loongson:yeeloong-fan [2011-09-28 09:17 UTC]
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loongson:yeeloong-fan [2011-09-28 09:19 UTC] (current)
rm
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^ Command ^ Fan speed ^ ^ Command ^ Fan speed ^
-| ''echo 0 > /sys/class/hwmon/hwmon0/pwm1'' | 250 RPM  |+| ''echo 0 > /sys/class/hwmon/hwmon0/pwm1'' | 250 RPM (?) |
| ''echo 1 > /sys/class/hwmon/hwmon0/pwm1'' | 3300 RPM | | ''echo 1 > /sys/class/hwmon/hwmon0/pwm1'' | 3300 RPM |
| ''echo 2 > /sys/class/hwmon/hwmon0/pwm1'' | 3700 RPM | | ''echo 2 > /sys/class/hwmon/hwmon0/pwm1'' | 3700 RPM |
| ''echo 3 > /sys/class/hwmon/hwmon0/pwm1'' | 4300 RPM | | ''echo 3 > /sys/class/hwmon/hwmon0/pwm1'' | 4300 RPM |
-Values higher than 3 work identically to 3.+Values higher than 3 work identically to 3. The value of ''0'' makes ''sensors'' report 250 RPM for the fan, but it is suspected that this reading is wrong, and the fan is just turned completely off in this case.
-The difference in cooling between 3300 and 3700 RPM is not very significant, but it makes quite a bit more noice at 3700.+The difference in cooling between 3300 and 3700 RPM is not very significant, but it makes quite a bit more noise at 3700.
The fan speed can be dynamically adjusted from user-space without risking overheating the Yeeloong by setting it (statically) too low. The fan speed can be dynamically adjusted from user-space without risking overheating the Yeeloong by setting it (statically) too low.

loongson/yeeloong-fan.txt · Last modified: 2011-09-28 09:19 UTC by rm