* ASUS PU551LD, fan stuck at full speed after waking up from S3
@ 2015-05-29 11:51 Martin Herkt
2015-05-30 12:14 ` Rafael J. Wysocki
0 siblings, 1 reply; 3+ messages in thread
From: Martin Herkt @ 2015-05-29 11:51 UTC (permalink / raw)
Cc: linux-acpi, platform-driver-x86, acpi4asus-user, linux-pm
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.
acpidump output: https://0x0.st/9Z.out
Not being a kernel dev (but knowing C), what can I do to help fix this issue?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ASUS PU551LD, fan stuck at full speed after waking up from S3
2015-05-29 11:51 ASUS PU551LD, fan stuck at full speed after waking up from S3 Martin Herkt
@ 2015-05-30 12:14 ` Rafael J. Wysocki
2015-05-30 13:11 ` Martin Herkt
0 siblings, 1 reply; 3+ messages in thread
From: Rafael J. Wysocki @ 2015-05-30 12:14 UTC (permalink / raw)
To: Martin Herkt; +Cc: linux-acpi, platform-driver-x86, acpi4asus-user, linux-pm
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.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: ASUS PU551LD, fan stuck at full speed after waking up from S3
2015-05-30 12:14 ` Rafael J. Wysocki
@ 2015-05-30 13:11 ` Martin Herkt
0 siblings, 0 replies; 3+ messages in thread
From: Martin Herkt @ 2015-05-30 13:11 UTC (permalink / raw)
To: Rafael J. Wysocki
Cc: linux-acpi, platform-driver-x86, acpi4asus-user, linux-pm
On Saturday 30 May 2015 14:14:06 Rafael J. Wysocki wrote:
> 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?
No, still happens with that patch.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2015-05-29 11:51 ASUS PU551LD, fan stuck at full speed after waking up from S3 Martin Herkt
2015-05-30 12:14 ` Rafael J. Wysocki
2015-05-30 13:11 ` Martin Herkt
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