thinkpad_acpi.2ndfan.patch
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Force pwm fans to run at full speed (level full-speed)
Without this patch, fan1 could be controlled as a tp_fan and was able to run at its full speed (~5000 RPM) by setting the level to "level full-speed".
After applying the patch, the fans are seen as pwm fans and their maximum value is 255, which corresponds to ~4500 RPM.
Is there a way to either use the fans as tp_fans instead of pwm or somehow force their speed over their level 255?
for now you can force full speed by writing 0 to pwm*_enable.
but then you have to write 0 to pwm*_enable to set lower speed via pwm*.