Clarification: Screen does not always come up dimmed after suspend. Screen comes up with setting prior to suspend.
If the computer has gone into suspend itself after being unused for a certain amount of time it comes up dimmed, even if not deliberately set to this by the user. In these circumstances the computer has dimmed the screen some time prior to going into suspend. In all cases controls no longer function after suspend as reported in initial post. -- 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/1338063 Title: Brightness control lost after suspend screen dimmed Status in “linux” package in Ubuntu: Confirmed Bug description: Using Ubuntu 14.04. Recently updated to kernel version Ubuntu 3.13.0-30.54-generic 3.13.11.2 I expect brightness of my LCD screen to remain the same and be controllable after waking from suspend. It doesn't and isn't. This seems to have only started recently - presumably after a recent update. What happens: Brightness controls fully working after initial boot, both through function keys and system settings. After putting computer into suspend and then re-awakening the LCD screen comes up with lowest brightness in actual appearance but settings still show the brightness as set at suspend time. Controls for brightness have become ineffective - they slide the brightness bar along but make no difference to the actual brightness of the screen. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-30-generic 3.13.0-30.54 ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2 Uname: Linux 3.13.0-30-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: john 2060 F.... pulseaudio CurrentDesktop: Unity Date: Sat Jul 5 18:55:05 2014 InstallationDate: Installed on 2012-06-04 (760 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: TOSHIBA PORTEGE Z835 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=865f4d37-5ceb-4e4a-b59b-032fa8a2c80b ro quiet splash elevator=noop vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-30-generic N/A linux-backports-modules-3.13.0-30-generic N/A linux-firmware 1.127.4 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to trusty on 2014-04-27 (68 days ago) dmi.bios.date: 02/08/2012 dmi.bios.vendor: TOSHIBA dmi.bios.version: Version 1.60 dmi.board.asset.tag: 0000000000 dmi.board.name: Portable PC dmi.board.vendor: TOSHIBA dmi.board.version: Version A0 dmi.chassis.asset.tag: 0000000000 dmi.chassis.type: 10 dmi.chassis.vendor: TOSHIBA dmi.chassis.version: Version 1.0 dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.60:bd02/08/2012:svnTOSHIBA:pnPORTEGEZ835:pvrPT224U-01W00C:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0: dmi.product.name: PORTEGE Z835 dmi.product.version: PT224U-01W00C dmi.sys.vendor: TOSHIBA To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1338063/+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