Hi! Thanks for your advice! The procedure you adviced me was near limits of my linux and Ubuntu using skills. But I can infrom this problem is solved currently this way. I suddenly adjusted the audio level from laptop button to zero. That somehow reseted the brightness function also, and it has been working okay since then.
Regards, Toni Leino 2015-08-13 0:25 GMT+03:00 Joseph Salisbury <joseph.salisb...@canonical.com>: > Would it be possible for you to test the latest upstream kernel? Refer > to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest > v4.2 kernel[0]. > > If this bug is fixed in the mainline kernel, please add the following > tag 'kernel-fixed-upstream'. > > If the mainline kernel does not fix this bug, please add the tag: > 'kernel-bug-exists-upstream'. > > Once testing of the upstream kernel is complete, please mark this bug as > "Confirmed". > > > Thanks in advance. > > [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.2-rc6-unstable/ > > ** Changed in: linux (Ubuntu) > Importance: Undecided => Medium > > ** Changed in: linux (Ubuntu) > Status: Confirmed => Incomplete > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1483366 > > Title: > Lenovo E540: Brightness control does not work > > Status in linux package in Ubuntu: > Incomplete > > Bug description: > After last Ubuntu updates, brightness control buttons stopped to work, > brightness is stuck on maximum. When pressing key to reduce brightness, > indicator shows up as it should, but doesn't let to reduce the indicator > any step lower. Running Ubuntu 14.04 LTS. > --- > ApportVersion: 2.14.1-0ubuntu3.11 > Architecture: amd64 > AudioDevicesInUse: > USER PID ACCESS COMMAND > /dev/snd/controlC0: lenovou 2662 F.... pulseaudio > /dev/snd/controlC1: lenovou 2662 F.... pulseaudio > CurrentDesktop: Unity > DistroRelease: Ubuntu 14.04 > HibernationDevice: RESUME=UUID=0b3d8bde-fcba-4eb8-8ec0-9218338b66ad > InstallationDate: Installed on 2015-02-14 (176 days ago) > InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 > (20140722.2) > MachineType: LENOVO 20C6003QMS > Package: linux (not installed) > ProcFB: 0 inteldrmfb > ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-61-generic > root=UUID=c4dc0d94-61b2-4b8b-b547-79fea553646b ro quiet splash vt.handoff=7 > ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22 > RelatedPackageVersions: > linux-restricted-modules-3.13.0-61-generic N/A > linux-backports-modules-3.13.0-61-generic N/A > linux-firmware 1.127.14 > Tags: trusty > Uname: Linux 3.13.0-61-generic x86_64 > UpgradeStatus: No upgrade log present (probably fresh install) > UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo > _MarkForUpload: True > dmi.bios.date: 08/29/2014 > dmi.bios.vendor: LENOVO > dmi.bios.version: J9ET93WW (2.13 ) > dmi.board.asset.tag: Not Available > dmi.board.name: 20C6003QMS > dmi.board.vendor: LENOVO > dmi.board.version: 0B98401 WIN > dmi.chassis.asset.tag: No Asset Information > dmi.chassis.type: 10 > dmi.chassis.vendor: LENOVO > dmi.chassis.version: Not Available > dmi.modalias: > dmi:bvnLENOVO:bvrJ9ET93WW(2.13):bd08/29/2014:svnLENOVO:pn20C6003QMS:pvrThinkPadEdgeE540:rvnLENOVO:rn20C6003QMS:rvr0B98401WIN:cvnLENOVO:ct10:cvrNotAvailable: > dmi.product.name: 20C6003QMS > dmi.product.version: ThinkPad Edge E540 > dmi.sys.vendor: LENOVO > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1483366/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1483366 Title: Lenovo E540: Brightness control does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1483366/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
