Has been 2 years, but now i found a solution....for my emachines e725 here is kernel 3.5 rc 4 with all the i915 patches (i think):
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.5-rc4-quantal/ install all the needed packages acording to your architectures i386 or amd64, for example for amd64: dkpg -i linux-headers-3.5.0-030500rc4-generic_3.5.0-030500rc4.201206241635_amd64.deb linux-headers-3.5.0-030500rc4_3.5.0-030500rc4.201206241635_all.deb linux-image-3.5.0-030500rc4-generic_3.5.0-030500rc4.201206241635_amd64.deb linux-image-extra-3.5.0-030500rc4-generic_3.5.0-030500rc4.201206241635_amd64.deb then you have to add to kernel boot parameters: acpi_backlight=vendor i915.invert_brightness=1 you can make them permant by editing /etc/default/grub , editing this line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor i915.invert_brightness=1" then run: update-grub2 now you have your brightness working as on kernel 2.6-idontremember... this patches has been liying around for a couple of months is a shame that no one from the canonical team, test them and create a ppa... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/765438 Title: On startup, the backlight is off on laptop To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/765438/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
