Hi how can i get back (downgrade) from 12.04.3 kernel and it's xservers to 12.04.2 ones? i have some problems with 12.04.3 kernel and want to downgrade.
You should be able to remove raring kernel and X stack by running the following command
sudo apt-get purge linux-generic-lts-raring xserver-xorg-lts-raring
NOTE: Do not install the
linux-current-genericpackage as it will install the latest release kernel (now it's raring's 3.8).
This should roll back to 12.04.2. If NOT, manually install quantal kernel and x stacks manually =>
sudo apt-get install --install-recommends linux-generic-lts-quantal xserver-xorg-lts-quantal libgl1-mesa-glx-lts-quantal.