[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/209837
Title:
[Acer Aspire 5720z] ACPI fan control problem
Status in “linux” package in Ubuntu:
Expired
Bug description:
Hello! I bought an Acer Aspire 5720z laptop a half year ago. First I
had 7.10, since february Hardy beta. Unfortunately I have the same
ACPI problem with both versions: When I turn on the computer, the fan
goes with full speed. After Ubuntu starts to boot, the fan stops
suddenly. Usually the cpu overheats after about 30min and the bios
turns the pc off. After turning it immediately on, and booting ubuntu,
The fan speed goes up to max, but stays on the maximum forever.
I changed my bios, but the it haven't solve this problem. Then I
started to analyze acpi and found an interesting thing: Acpi gets only
statically cpu-temp message by the booting. When I start the pc it
shows usually 40 C, but if I see the 'sensors' application, I can see
that the real temperature goes upper and upper 50-60-70-80.... C and
then the turning off by bios. ACPI shows always 40, so as it seems to
be low, it won't ever start the fan. After the immediate restarting
ACPI shows 70 C and it runs the cpufan on fullspeed. when I look at
the sensors data, I can see, that the real cputemp comes down to
25-35C. I can also see cpu speed-step working well, only this fan is
the problem for me. I would be very happy if anyone knew the answer
for this problem, and naturally I can help you with more infos, if you
need. Thanx!!
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