Solved ! I changed the boot options to : pnpbios=off irqpoll and it solved the IRQ conflict Looks like it was a hardware problem, not related to the xserver-xorg-video-intel package
Thanks Peter anyway, keep up the good work ! ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Incomplete => Fix Committed -- [gutsy] performance regression with i915 xorg driver (glxgears in liveCD or after HD install) https://bugs.launchpad.net/bugs/155985 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs