Christopher, thank you for your advice and my apologies for not following the protocol of first checking for BIOS updates.
I have now updated the BIOS. Results of "sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date" are: Version 1.80 04/18/2013 so the update has worked. Unfortunately the problem still persists as previously described. Please note the problem also manifests on my wife's Toshiba Protege Z835-ST8305 which I have also updated to the latest BIOS. Her computer is also running Ubuntu 14.04 with kernel version Ubuntu 3.13.0-30.55-generic 3.13.11.2 Thank you for your help. -- 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: [Toshiba Portege Z835-ST6N03] Brightness control lost after suspend screen dimmed Status in “linux” package in Ubuntu: Incomplete 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
