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Acer Aspire CPU fan intermittent
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Progman3K
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Joined: 03 Jan 2004
Posts: 668

PostPosted: Fri May 09, 2014 1:33 pm    Post subject: Acer Aspire CPU fan intermittent Reply with quote

Hi,

I have installed the latest of everything on an Acer Aspire 772--6208 laptop.
Code:
uname -a
Quote:
Linux bruford 3.12.13-gentoo #2 SMP Fri May 9 09:00:35 EDT 2014 x86_64 Intel(R) Core(TM)2 Duo CPU T5450 @ 1.66GHz GenuineIntel GNU/Linux


The only problem is the CPU fan behaviour.

The fan *sometimes* starts working at boot for no reason I can understand and will continue to function for the entire time the machine is not restarted.
Other times, after a restart the fan will absolutely NOT turn on, no matter what, resulting in the laptop switching itself off suddenly when a temperature threshold is exceeded.

EDIT: I've tried adding the noapic kernel option and although that seemed to make the fan start the first time I tried it, subsequent reboots still had the same problem. Adding the noapic option seems to have increased the frequency at which the fan turns on; it seems to enable the fan every other boot now.

Here are some pertinent infos:

dmesg excerpt
Quote:
[ 2.077443] acerhdf: Acer Aspire One Fan driver, v.0.5.26
[ 2.079511] acerhdf: unknown (unsupported) BIOS version Acer /Aspire 7720 /V1.22, please report, aborting!
After reading the various sources on the internet, this apparently means the drivers IS functioning correctly.

Code:
lsmod
Quote:
Module Size Used by
coretemp 5478 0
i2c_i801 8544 0

Code:
systemctl status sensord
Quote:
sensord.service - Sensor information logging daemon
Loaded: loaded (/usr/lib64/systemd/system/sensord.service; enabled)
Active: active (running) since ven. 2014-05-09 09:07:06 EDT; 10min ago
Main PID: 2455 (sensord)
CGroup: /system.slice/sensord.service
������2455 /usr/sbin/sensord

mai 09 09:07:06 bruford systemd[1]: Starting Sensor information logging daemon...
mai 09 09:07:06 bruford systemd[1]: Started Sensor information logging daemon.
mai 09 09:07:06 bruford sensord[2455]: sensord started
mai 09 09:07:06 bruford sensord[2455]: Chip: acpitz-virtual-0
mai 09 09:07:06 bruford sensord[2455]: Adapter: Virtual device
mai 09 09:07:06 bruford sensord[2455]: temp1: 40.0 C
mai 09 09:07:06 bruford sensord[2455]: Chip: coretemp-isa-0000
mai 09 09:07:06 bruford sensord[2455]: Adapter: ISA adapter
mai 09 09:07:06 bruford sensord[2455]: Core 0: 67.0 C
mai 09 09:07:06 bruford sensord[2455]: Core 1: 67.0 C


Code:
systemctl status lm_sensors
Quote:
lm_sensors.service - Initialize hardware monitoring sensors
Loaded: loaded (/usr/lib64/systemd/system/lm_sensors.service; enabled)
Active: active (exited) since ven. 2014-05-09 09:06:58 EDT; 11min ago
Process: 2434 ExecStop=/sbin/modprobe -qabr $BUS_MODULES $HWMON_MODULES (code=exited, status=0/SUCCESS)
Process: 2448 ExecStart=/usr/bin/sensors -s (code=exited, status=0/SUCCESS)
Process: 2442 ExecStart=/sbin/modprobe -qab $BUS_MODULES $HWMON_MODULES (code=exited, status=0/SUCCESS)
Main PID: 2448 (code=exited, status=0/SUCCESS)
CGroup: /system.slice/lm_sensors.service

mai 09 09:06:58 bruford systemd[1]: Started Initialize hardware monitoring sensors.


Here is the kernel config:
http://pastebin.com/dXS9Pyx1

And the lspci -v output:
http://pastebin.com/JaeKkmvS


Can anyone please tell me what I've missed?
Thank you


Last edited by Progman3K on Tue May 13, 2014 1:17 pm; edited 2 times in total
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geonix
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Joined: 07 Jul 2005
Posts: 41
Location: Minsk

PostPosted: Mon May 12, 2014 8:59 pm    Post subject: Reply with quote

Progman3K, I had the same issue with my Acer 5630.
Fan always worked quite loudly after boot,
but laptop often stopped working from overheating because fan was stopped. It was very strange, because after restarting fan started as needed.

I tried all possible options , including laptop mode tools , noapic etc.
But the problem was in the fan itself. I replaced it for ~12$ and problem dissapeared.
_________________
Higher ,greater, further
2.6.37-gentoo-r2 x86_64 Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz GenuineIntel GNU/Linux
Dell inspiron 1525
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Progman3K
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Joined: 03 Jan 2004
Posts: 668

PostPosted: Tue May 13, 2014 1:16 pm    Post subject: Reply with quote

geonix,

Thank you for taking the time to reply.

The fan may have a mechanical problem, but it's not likely:

Originally, the laptop ran Windows 7 without problems for a few years until it began shutting down without warning when under load, increasingly-often.

Technicians opened the case, cleaned the grills and cpu fan, changed the cpu thermal paste.
The fan was deemed OK.

The laptop was then tested with Live-CDs (Windows/linux).
The technician-reported difference was that when booted by Windows, the fan would work and when booted with linux, it would not.

After installing Gentoo, the fan works 1 out of every 8 boots.
However, on a 'lucky' boot, the fan works perfectly for hundreds of hours under every type of workload (see config listed above) until rebooted.

Booting with Knoppix 7.2, the fan works properly every time.

From everything I have read, there are possibilities

- Some have reported a fix by upgrading to BIOS v1.45, the laptop is v1.22

The problem is figuring out how to flash the BIOS because the firmware-installing program is a Windows executable that contains a compressed set of another series of executable files that also require Windows but the laptop is linux-only.

- Change kernel config or kernel version.

Thanks for your time
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