From: Martin Herkt <lachs0r@srsfckn.biz>
Cc: linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org,
acpi4asus-user@lists.sourceforge.net, linux-pm@vger.kernel.org
Subject: ASUS PU551LD, fan stuck at full speed after waking up from S3
Date: Fri, 29 May 2015 13:51:57 +0200 [thread overview]
Message-ID: <1949840.6Csghk90X0@sakuya> (raw)
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?
next reply other threads:[~2015-05-29 11:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-29 11:51 Martin Herkt [this message]
2015-05-30 12:14 ` ASUS PU551LD, fan stuck at full speed after waking up from S3 Rafael J. Wysocki
2015-05-30 13:11 ` Martin Herkt
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