I also have a Fujitsu T2010 and have experienced problems changing LCD brightness in Intrepid (8.10). Changing brightness with the Fn+... keys never worked in Ubuntu, though using xbacklight used to work (I don't remember exactly when it stopped working).
I found 2 possible solutions to this problem: [1] Upgrade kernel to 2.6.28 in Jaunty's (9.04) repositories. More specifically, I downloaded the package linux-image-2.6.28-6-generic (2.6.28-6.16) from <http://packages.ubuntu.com/jaunty/linux- image-2.6.28-6-generic> and ran `dpkg -i` on that. This system doesn't need any of the modules in linux-modules-restricted. A similar bug in Novell's bug tracker <https://bugzilla.novell.com/show_bug.cgi?id=401215> suggests it was a bunch of video-related patches in 2.6.28-rc6 which solved the problem. RESULT: Echoing values into /sys/class/backlight/acpi_video0/brightness works. Changing brightness via Fn+F6/F7 keys works. The slider in kpowersave's config works. [2] Tell Xorg's intel driver to not use kernel interface for controlling the backlight. xrandr --output LVDS --set BACKLIGHT_CONTROL native Setting BACKLIGHT_CONTROL to "combination" or "legacy" also worked. Just anything other than "kernel", it seems. RESULT: brightness can once again be changed with: xbacklight -set 20 or some other percentage value. However, anything which doesn't use Xorg's RandR extension to change the screen's brightness (i.e. anything other than xbacklight) won't work. This is rather inconvenient. CONCLUSION: I suppose it's too much to ask for a backport of the fixes from 2.6.28. It's up to us long-suffering laptop users to decide whether we'd rather run an alien kernel or run xbacklight whenever we want to change the brightness level. All the more reason for me to be excited when Jaunty finally comes out. =) -- Cannot change screen brightness on Fujitsu T2010 laptop in Intrepid https://bugs.launchpad.net/bugs/220407 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
