https://bugzilla.kernel.org/show_bug.cgi?id=119211 Stas Sergeev (stsp2@xxxxxxxxx) changed: What |Removed |Added ---------------------------------------------------------------------------- Kernel Version|4.5.5 |6.7.7 --- Comment #18 from Stas Sergeev (stsp2@xxxxxxxxx) --- I figured out something very interesting regarding this bug. Writing 2 to pwm1_enable causes the fan to rotate for about 10 seconds. Note that the old value of pwm1_enable is also 2, so it doesn't change, but the mere fact of writing has an effect! And this is not all! Now if you periodically READ from pwm1, then the fan doesn't stop! I can do: while :; do cat /sys/class/hwmon/hwmon0/pwm1; sleep 1; done And with this, the fan keeps rotating forever! But if you stop that script for something like 10 seconds, then the fan stops and pwm1 reads always return 0. You need to start again by writing 2 to pwm1_enable (even if there is already 2!), and quickly start reading from pwm1, and you have your fan finally rotating. :) A bit of a hand-written fancontrol script. :) Alex Deucher can you make any sense out of that? -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
