My workaround now is to reboot and change the brightness from grub(!)
$ dpkg -l | grep linux-image ii linux-image-2.6.24-19-generic 2.6.24-19.41 Linux kernel image for version 2.6.24 on x86/x86_64 rc linux-image-2.6.24-21-generic 2.6.24-21.43 Linux kernel image for version 2.6.24 on x86/x86_64 ii linux-image-2.6.27-11-generic 2.6.27-11.27 Linux kernel image for version 2.6.27 on x86/x86_64 ii linux-image-2.6.27-7-generic 2.6.27-7.16 Linux kernel image for version 2.6.27 on x86/x86_64 ii linux-image-2.6.27-9-generic 2.6.27-9.19 Linux kernel image for version 2.6.27 on x86/x86_64 ii linux-image-generic 2.6.27.11.14 Generic Linux kernel image $ uname -r 2.6.27-11-generic $ dpkg --status linux-image-2.6.27-11-generic Package: linux-image-2.6.27-11-generic Status: install ok installed Priority: optional Section: base Installed-Size: 92184 Maintainer: Ubuntu Kernel Team <kernel-t...@lists.ubuntu.com> Architecture: i386 Source: linux Version: 2.6.27-11.27 Provides: fuse-module, ivtv-modules, kvm-api-4, linux-image, linux-image-2.6, ndiswrapper-modules-1.9, redhat-cluster-modules Depends: initramfs-tools (>= 0.36ubuntu6), coreutils | fileutils (>= 4.0), module-init-tools (>= 3.3-pre11-4ubuntu3) Pre-Depends: dpkg (>= 1.10.24) Recommends: lilo (>= 19.1) | grub Suggests: fdutils, linux-doc-2.6.27 | linux-source-2.6.27 Conflicts: hotplug (<< 0.0.20040105-1) Description: Linux kernel image for version 2.6.27 on x86/x86_64 This package contains the Linux kernel image for version 2.6.27 on x86/x86_64. . Also includes the corresponding System.map file, the modules built by the packager, and scripts that try to ensure that the system is not left in an unbootable state after an update. . Supports Generic processors. . Geared toward desktop systems. . You likely do not want to install this package directly. Instead, install the linux-generic meta-package, which will ensure that upgrades work correctly, and that supporting packages are also installed. -- Backlight control doesn't work anymore on thinkpad https://bugs.launchpad.net/bugs/313231 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