It seems that I have been affected by power regression bug. I am using Ubuntu 11.10. I want to know is there any harm in downgrading to a kernel that does not have this bug. How to downgrade the Kernel? Is http://kernel.ubuntu.com/~kernel-ppa/mainline/v184.108.40.206-oneiric/ kernel suitable for this purpose.
why dont you try upgrading the kernel to 3.1.0 to remove the bug.
Donwloading from the Mainline the linux-image-3.1.0-030100rc10-generic. Installing it. Rebooting with it and the ubuntu 11.10 is running with the 3.1.
if you want to downgrade
Ubuntu Packages Search: http://packages.ubuntu.com
Picking natty-updates kernel linux-image-2.6.38-10-generic : http://packages.ubuntu.com/natty-updates/linux-image
Downloading it and installing with the command:
sudo dpkg -i linux-image-2.6.38-10-generic_2.6.38-10.46_i386.deb