This problem isn't limited to nforce chipsets.

My Thinkpad A22p (1GHzP3 440BX chipset) laptop has the same problem.
While running 7.10 the CPU freq throttling worked correctly without
requiring any configuration changes.  However, when I upgraded to 8.04
the CPU began to run at full speed (1000MHz vs. 700MHz) 100% of the time
and dmesg showed multiple error messages "ondemand governor failed, too
long transition latency of HW, fallback to performance governor".

This problem greatly reduces the laptop's battery life and causes the
laptop to run hot.

Running the following commands (as root via sudo) returns the CPU freq
control to normal operation.

sudo cpufreq-selector -g userspace
sudo /etc/init.d/powernowd stop
sudo powernowd -q

Note: this laptop does not support ACPI, only APM.  Grub passes acpi=off
to the kernel.  If acpi=off isn't used several features of this laptop
have problems.

-- 
[hardy] Regression: powernowd no longer works with nforce2 cpufreq driver
https://bugs.launchpad.net/bugs/223812
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.

-- 
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs

Reply via email to