Re: ASUS PU551LD, fan stuck at full speed after waking up from S3

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On Friday, May 29, 2015 01:51:57 PM Martin Herkt wrote:
> My ASUS PU551LD laptop has a problem with its fan state when resuming from S3. 
> In particular, the fan goes to full speed a second or two after waking up and 
> cannot be reset without turning off the laptop. For example, rebooting to 
> Windows and doing a suspend/resume cycle while the fan is in bad state will 
> not reset it. I have observed this behavior with all kernel versions I have 
> used on this laptop (oldest being 3.16, newest 4.1-rc5).
> 
> sensors(1) does not show any fans, but asus-nb-wmi exposes 
> /sys/class/hwmon/hwmon2/pwm1, which shows values like 85 during normal 
> operation but goes to the expected 255 when the fan is running at full speed 
> after waking up from S3.

Can you please check if applying the patch at

https://patchwork.kernel.org/patch/6451241/

on top of 4.1-rc5 makes any difference?


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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