Hi, I have now gone back and tested kernels back to 2.6.32, the kernel that was used in Ubuntu when this laptop was released. It seems I remembered incorrectly, backlight control has never worked properly on this laptop.
Backlight control did not work on any of the kernels I tested. I tested the following kernels: - 2.6.32-69-generic - 2.6.38-02063808-generic - 3.0.1-030001-generic - 3.11.0-12-generic - 3.11.0-26-generic - 3.13.0-32-generic - 3.13.0-34-generic - 3.13.0-37-generic - 3.13.0-37-generic - 3.18.0-031800rc4-generic It is possible that the problem is the same as for the UL-80VT: https://bugzilla.kernel.org/show_bug.cgi?id=66501 ** Bug watch added: Linux Kernel Bug Tracker #66501 http://bugzilla.kernel.org/show_bug.cgi?id=66501 ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1392016 Title: [Asus UL30VT] Backlight control does not work Status in linux package in Ubuntu: Confirmed Bug description: The backlight control on my Asus UL30VT has not worked for quite a while. It used to work, a few ubuntu versions ago. The backlight control bubble does show up when the function keys on the laptop are pressed. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-39-generic 3.13.0-39.66 ProcVersionSignature: Ubuntu 3.13.0-39.66-generic 3.13.11.8 Uname: Linux 3.13.0-39-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: lina 2081 F.... pulseaudio /dev/snd/controlC0: lina 2081 F.... pulseaudio CurrentDesktop: Unity Date: Wed Nov 12 20:20:31 2014 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=c8002bb0-2b05-4952-bc8b-bfcd29ac6117 InstallationDate: Installed on 2013-02-26 (623 days ago) InstallationMedia: This MachineType: ASUSTeK Computer Inc. UL30VT ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-39-generic root=UUID=ff44dc17-e11a-4d44-8ab6-bf188f64ed83 ro quiet splash acpi_backlight=vendor vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-39-generic N/A linux-backports-modules-3.13.0-39-generic N/A linux-firmware 1.127.8 SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-07-20 (115 days ago) dmi.bios.date: 07/14/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 211 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: UL30VT dmi.board.vendor: ASUSTeK Computer Inc. dmi.board.version: 1.0 dmi.chassis.asset.tag: ATN12345678901234567 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK Computer Inc. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr211:bd07/14/2010:svnASUSTeKComputerInc.:pnUL30VT:pvr1.0:rvnASUSTeKComputerInc.:rnUL30VT:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0: dmi.product.name: UL30VT dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK Computer Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1392016/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
