After installing the latest updates it works fine with the standard kernel too. Don't know what was the reason but it works.
** Changed in: linux-meta (Ubuntu) Status: Unconfirmed => Fix Released -- Sony tx brightness keys doesn't work anymore in edgy https://launchpad.net/bugs/64321 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs