Brightness keys do nothing, stuck on full brightness

[Michael]

Brightness keys do nothing, stuck on full brightness

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-116-generic 4.4.0-116.140
ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
Uname: Linux 4.4.0-116-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: forge 1895 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri Feb 23 19:47:44 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-02-23 (0 days ago)
InstallationMedia: Ubuntu 14.04.5 LTS "Trusty Tahr" - Release amd64 (20160803)
MachineType: LENOVO 80R3
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-116-generic.efi.signed root=UUID=85451546-daae-4935-b12f-494e677b1dac ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-116-generic N/A
 linux-backports-modules-4.4.0-116-generic N/A
 linux-firmware 1.157.16
SourcePackage: linux
UpgradeStatus: Upgraded to xenial on 2018-02-23 (0 days ago)
dmi.bios.date: 12/23/2015
dmi.bios.vendor: LENOVO
dmi.bios.version: D3CN29WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: Flex 3-1480
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Flex 3-1480
dmi.modalias: dmi:bvnLENOVO:bvrD3CN29WW:bd12/23/2015:svnLENOVO:pn80R3:pvrFlex3-1480:rvnLENOVO:rnFlex3-1480:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrFlex3-1480:
dmi.product.name: 80R3
dmi.product.version: Flex 3-1480
dmi.sys.vendor: LENOVO

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.16 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/v4.16-rc3

[albertoiNET (albertoinet)]

Still continue with kernel upstream mainline v4.15.7 (28 February) because there isn't v4.16 version stable (all rc)

uname -a
Linux portatil 4.15.7-041507-generic #201802280530 SMP Wed Feb 28 10:31:47 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Thanks

[Kai-Heng Feng (kaihengfeng)]

What's the output of `find /sys/class/backlight`?

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]