Exactly same problem here with Vaio-VPCY11V9E. "acpi_video0", "acpi_video1" and "intel_backlight" folders at /sys/class/backlight and only intel_backlight works when echo'ing values to brightness with ubuntu 11.10
This is a really PITA, is there any workaround available? It would be a huge pain-saver? At least till this bug is closed... -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/524967 Title: Screen brightness doesn't work on Vaio Y Status in “gnome-power-manager” package in Ubuntu: In Progress Bug description: Binary package hint: acpi-support On a Sony Vaio VPCY115FX (Y series) with the Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (Mobile Intel GS45 Express Chipset) running Karmic 64-bit, the screen brightness control doesn't work, although the Fn keys seem to be sending the right signals (and also being correctly interpreted by Gnome). The output of acpi_listen is sony/hotkey SNC 00000001 00000011 (Fn+F6 struck - brightness +) sony/hotkey SNC 00000001 0000003b (Fn+F6 released) sony/hotkey SNC 00000001 00000010 (Fn+F5 struck - brightness -) sony/hotkey SNC 00000001 0000003b (Fn+F5 released) I have tried the following procedures, with no effect. - http://ubuntuforums.org/showthread.php?p=2877962 - http://ubuntuforums.org/showthread.php?t=733322 This problem has also been reported for previous and current versions of Ubuntu, on different Vaio laptops with different graphic cards. - http://ubuntuforums.org/showthread.php?t=1404806 ProblemType: Bug Architecture: amd64 Date: Sat Feb 20 14:54:25 2010 DistroRelease: Ubuntu 9.10 InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027) Package: acpi-support 0.129 ProcEnviron: LANGUAGE=pt_BR.UTF-8 LANG=pt_BR.UTF-8 SHELL=/bin/bash ProcVersionSignature: Ubuntu 2.6.31-19.56-generic SourcePackage: acpi-support Uname: Linux 2.6.31-19-generic x86_64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/524967/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
