Hi Joseph, I don't really feel comfortable installing a new kernel. I'm adding the 'kernel-unable-to-test-upstream' tag.
** Tags added: kernel-unable-to-test-upstream -- 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/1324529 Title: Backlight not adjustable Status in “linux” package in Ubuntu: Incomplete Bug description: Running 14.04, just upgraded. I can no longer adjust my backlight on my ThinkPad T530. I am attaching a number of files as requested in https://wiki.ubuntu.com/Kernel/Debugging/Backlight. See also: http://askubuntu.com/questions/473660/brightness-keys-no-longer-work Note that /sys/class/backlight is empty unless acpi_backlight=vendor is set. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-27-generic 3.13.0-27.50 ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11 Uname: Linux 3.13.0-27-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: eli 3150 F.... pulseaudio CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied Date: Thu May 29 08:43:12 2014 InstallationDate: Installed on 2012-11-02 (572 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MachineType: LENOVO 2359CTO ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset video.use_native_backlight=1 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-05-25 (3 days ago) WifiSyslog: dmi.bios.date: 09/13/2012 dmi.bios.vendor: LENOVO dmi.bios.version: G4ET62WW (2.04 ) dmi.board.asset.tag: Not Available dmi.board.name: 2359CTO dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2359CTO dmi.product.version: ThinkPad T530 dmi.sys.vendor: LENOVO --- ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: eli 3150 F.... pulseaudio /dev/snd/pcmC0D0p: eli 3150 F...m pulseaudio /dev/snd/timer: eli 3150 f.... pulseaudio CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied dmesg: write failed: Broken pipe DistroRelease: Ubuntu 14.04 InstallationDate: Installed on 2012-11-02 (572 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5) MachineType: LENOVO 2359CTO Package: linux 3.11.0.20.21 [origin: unknown] PackageArchitecture: amd64 ProcFB: ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset video.use_native_backlight=1 ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no Tags: trusty third-party-packages Uname: Linux 3.13.0-27-generic x86_64 UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again. UpgradeStatus: Upgraded to trusty on 2014-05-25 (3 days ago) UserGroups: bumblebee lpadmin sudo vboxusers WifiSyslog: _MarkForUpload: True dmi.bios.date: 09/13/2012 dmi.bios.vendor: LENOVO dmi.bios.version: G4ET62WW (2.04 ) dmi.board.asset.tag: Not Available dmi.board.name: 2359CTO dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 2359CTO dmi.product.version: ThinkPad T530 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1324529/+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