I'm having fan problems with Ubuntu 16.04 on my Asus N552VW-FY094T.
Laptop boots up OK, but after about 10 seconds the fan is pinned on full speed.
Right after logging in, the fan seems and is running at a sensible speed. This is then the output from 'sensors':
acpitz-virtual-0 Adapter: Virtual device temp1: +29.0°C (crit = +103.0°C) nouveau-pci-0100 Adapter: PCI adapter temp1: N/A (high = +95.0°C, hyst = +3.0°C) (crit = +105.0°C, hyst = +5.0°C) (emerg = +135.0°C, hyst = +5.0°C) coretemp-isa-0000 Adapter: ISA adapter Physical id 0: +30.0°C (high = +100.0°C, crit = +100.0°C) Core 0: +29.0°C (high = +100.0°C, crit = +100.0°C) Core 1: +37.0°C (high = +100.0°C, crit = +100.0°C) Core 2: +28.0°C (high = +100.0°C, crit = +100.0°C) Core 3: +28.0°C (high = +100.0°C, crit = +100.0°C) asus-isa-0000 Adapter: ISA adapter cpu_fan: 2100 RPM temp1: +29.0°C
Then, few seconds later, the fan's speed is pinned on max and this is the output:
( .. snip ...) asus-isa-0000 Adapter: ISA adapter cpu_fan: 25500 RPM temp1: +26.0°C
The relevant hwmon is in /sys/class/hwmon/hwmon3, provided by the asus_nb_wmi module:
lrwxrwxrwx 1 root root 0 Aug 6 20:55 hwmon0 -> ../../devices/virtual/hwmon/hwmon0/ lrwxrwxrwx 1 root root 0 Aug 6 20:55 hwmon1 -> ../../devices/pci0000:00/0000:00:01.0/0000:01:00.0/hwmon/hwmon1/ lrwxrwxrwx 1 root root 0 Aug 6 20:55 hwmon2 -> ../../devices/platform/coretemp.0/hwmon/hwmon2/ lrwxrwxrwx 1 root root 0 Aug 6 20:55 hwmon3 -> ../../devices/platform/asus-nb-wmi/hwmon/hwmon3/
Inspecting the status of those files before the fan speeds up:
fan1_input: 2100 fan1_label: cpu_fan name: asus pwm1: 85 pwm1_enable: 2 temp1_input: 34000
After it speeds up:
fan1_input: 25500 fan1_label: cpu_fan name: asus pwm1: 255 pwm1_enable: 2 temp1_input: 25000
The DSDT my laptop is here.
What I've done so far:
- Updated to the latest BIOS (version 204)
- Echo 100 >/sys/class/hwmon/hwmon3/pwm1. I've tried other values but it doesn't matter. After this, the fan1_input files reports "-1" value. Echo 0 >pwm1_enable, no change.
- Installed kernel 2.6.5 (using linux-kernel-utilities). No change.
- Compiled and tried the asus-fan module. Module compiled and installed (I removed the others first), but it wasn't any better at controlling the fan.
- Tried the most recent asus-wmi.c and asus-nb-wmi.c (and .h) from the linux kernel, no change.
- I've tried setting acpi_osi to "Linux" and "Windows 2015" (found in the .dsl file), no change.
- I've tried blacklisting the asus-nb-wmi and asus-wmi modules. After rebooting the fan behaves exactly the same, which makes me think something else is responsible for this. Perhaps BIOS think there is no software adjusting the fan so it's maxing it out?