I found the problem on my Acer Extensa 5635Z (details above) just turned off acpi in /boot/grub/menu.lst
## ## End Default Options ## title Ubuntu 9.04, kernel 2.6.28-15-generic uuid 5e06e3a7-6489-4e7d-bbbd-2ddf8cff1d69 kernel /boot/vmlinuz-2.6.28-15-generic root=UUID=5e06e3a7-6489-4e7d-bbbd-2ddf8cff1d69 acpi=off ro quiet splash initrd /boot/initrd.img-2.6.28-15-generic quiet title Ubuntu 9.04, memtest86+ uuid 5e06e3a7-6489-4e7d-bbbd-2ddf8cff1d69 kernel /boot/memtest86+.bin acpi=off quiet ### END DEBIAN AUTOMAGIC KERNELS LIST -- LCD Brightness won't Change - Acer 4736z https://bugs.launchpad.net/bugs/392948 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
