Ubuntu
linux package

  1. Bug #637845
  2. Comment #12

Comment 12 for bug 637845

Revision history for this message
Adolfo R. Brandes (arbrandes) wrote :

I had a similar problem on my Asus U43JC which runs on an Intel i5-450m (using Ubuntu 10.10). The BIOS would limit my frequence at 1.2GHz, no matter what cpufreq governor I was using, no matter if on the power cord or on the battery. To fix this, I added "processor.ignore_ppc=1" to the kernel boot parameters.

To see if you have the same problem, do a:

$ cat /sys/devices/system/cpu/cpu0/cpufreq/bios_limit

In my case, anything less than 2400000 means the workaround is necessary. To implement it, just add "processor.ignore_ppc=1" to the GRUB_CMDLINE_LINUX_DEFAULT paramenter in /etc/default/grub, and then run:

$ sudo update-grub

Reboot.