Comment 34 for bug 392812

Having this problem on karmic as well. I was using noapic and nomodeset options on boot, and all the multimedia and eject and lid closing keys worked, and it went into hiberation and came out perfectly, but I was messing with the 'xserver-xorg-video-intel' driver and it hasn't been working since I rolled back (forward actually) after nearly FUBARing my installation. I was using version 2.9, then rolled back to 2.4 and then back to 2.9 and I haven't had ACPI since.