View Full Version : [ubuntu] Help! Overheat issue acer aspire 4736z

April 15th, 2011, 01:56 AM
help me please I think my laptop fan isn't working very well. Yes, it's running but I think in it's minimum speed my cpu temp is always 46-50 degrees after 5mins. And my video card is a built in intel pentium. I have ubuntu 10.04 os intalled.


April 15th, 2011, 01:58 AM
maybe something there will help

April 15th, 2011, 07:04 AM
To improve the function of the laptop fan using 'current' grub options:

gksudo gedit /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\\\"Linux\\\""

There are a total of 4 double quotes in this line (2 side-by-side at the end)

Then do:

sudo update-grub

And reboot. The operation of this will keep your computer running cooler.

In case you are wondering WHY all these slashes, it is because this text string gets processed twice before it is used to boot the kernel:

In /etc/default/grub it looks like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\\\"Linux\\\""

Which gets converted by the update-grub in /boot/grub/grub.cfg as:

linux /boot/vmlinuz-2.6.31-8-generic root=UUID=78b161e2-4d82-4df7-a423-8289fe6cc704
ro quiet splash acpi_osi=\"Linux\"

The command is then passed to the kernel when run by grub as:

Kernel command line: BOOT_IMAGE=/boot/vmlinuz-2.6.31-8-generic root=UUID=78b161e2-4d82-4df7-a423-8289fe6cc704
ro quiet splash acpi_osi="Linux"

See how easy that (isn't) to follow?

The Hedge


April 16th, 2011, 04:28 AM

Thanks that really helped.. thanks for the replies everyone