If this is still an issue on a supported release, please reply.
** Changed in: pm-utils (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/572528
Title:
Ubuntu ACPI/FAN Bug. Overheating issues.
Status in “pm-utils” package in Ubuntu:
Invalid
Bug description:
I started using Ubuntu with the 9.10 release. I found that the fan did
not work. The fan would not turn on at all, and coretemp+sensors
showed the CPU temp rising steadily.
I finally figured out, thanks to some help from the guys in #Ubuntu,
if I add acpi_osi="Linux" to the grub options at boot, the fan will
work.
I've reinstalled Ubuntu several times hoping it was a bad install or
something goofy was happening. I am running 10.04 now and I still must
manually edit grub to get the fan to work. I dual boot MS Windows
with this laptop, the fan works with that. I've tried several other
Linux distros, 32 and 64bit, multiple kernel versions, etc, some the
fan works, some it doesn't. I recently flashed my BIOS with the most
recent upgrade, this didn't help either. After running windows heavily
for a while (getting CPU temp up), and rebooting, the fan turns on at
boot in response to CPU temp, and will run forever in Linux. There
seems to be no thermal management with acpi. I don't know if this is
an Ubuntu issue, or an upstream issue with the kernel sources, or
(acpid?). I have found many forum posts about a lot of people with my
laptop and others made by Toshiba (mines a L505-S5971) having problems
like this.
After hibernating and suspending (both things I do often) the fan no
longer works, even on boots where acpi_osi="Linux" was added. I see
that there is a couple other bug reports with related to this, but
they are all several years old. This has become a big problem for me
so I'm willing to help out providing feedback and testing patches with
the latest kernel and acpid versions if someone is working/willing to
work on this.
Thanks,
-- Nicholas
2.6.32-21-generic #32-Ubuntu SMP x86_64 GNU/Linux
acpid-1.0.10
Toshiba L505-S5971
InsydeH2O BIOS v1.50 Toshiba Satellite
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