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I have recently swiched to Ubuntu and installed KDE on it. I like software included in Ubuntu but interface from Kubuntu.

My problem is, that after installation of Linux kernel 3.6.2 (default Ubuntu 12.04 is 3.2 I think), whole KDE interface is laggy and I have to render using Xrender because OpenAL doesn't work.

So please tell me, I didint find it anywhere, Does KDE has some problems with new kernel? should I downgrade back to 3.x.x?

Thank you for answers and your time.


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please excuse missclicks - Open AL*, Xrender*, ....... – Pelda Oct 18 '12 at 16:21

when you login u can choose old kernel on GRUB menu with advance menu and open konsole

  1. You can check your current used kernel with this command:

    uname -r
  2. To find a list of all installed kernels on your system, run this command:

    dpkg --list | grep linux-image
  3. To remove all unused kernels, run now this command:

    sudo aptitude purge ~ilinux-image-\[0-9\]\(\!`uname -r`\)

    In case aptitude is not installed, then install it with this command:

    sudo apt-get install aptitude
  4. Update now your Grub2 boot loader with this command:

    sudo update-grub
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