Could you please recheck it with latest Ubuntu Gutsy Gibbon 7.10 or the Live CD? Sony-laptop module is used instead of sony-acpi since Gutsy so maybe this was the problem.
** Changed in: linux-source-2.6.22 (Ubuntu) Sourcepackagename: None => linux-source-2.6.22 Status: New => Incomplete -- Screen Brightness adjustment fails for Sony VAIO VGN-AR250G https://bugs.launchpad.net/bugs/152095 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs