Public bug reported:
Using intel dual_core processor i just upgrade lts-16.04 to ubuntu 18.04
now i unable to reduce or increase brightness
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.17.0-6-generic 4.17.0-6.7
ProcVersionSignature: Ubuntu 4.17.0-6.7-generic 4.17.9
Uname: Linux 4.17.0-6-generic i686
ApportVersion: 2.20.10-0ubuntu7
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: rahul 1460 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 8 19:43:11 2018
HibernationDevice: RESUME=UUID=88199ab0-6838-4b90-a76c-b652cdaa92e7
InstallationDate: Installed on 2018-08-03 (4 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release i386 (20170801)
MachineType: LENOVO INVALID
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.17.0-6-generic
root=UUID=f569a9d4-9d61-428a-9277-bcfd42fe2e8c ro quiet splash
acpi_backlight=video vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.17.0-6-generic N/A
linux-backports-modules-4.17.0-6-generic N/A
linux-firmware 1.174
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to cosmic on 2018-08-07 (0 days ago)
dmi.bios.date: 12/26/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 4FCNA1WW
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: LENOVO
dmi.board.version: Base Board Version
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnLENOVO:bvr4FCNA1WW:bd12/26/2011:svnLENOVO:pnINVALID:pvrLenovoB460e:rvnLENOVO:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.family: Intel_Mobile
dmi.product.name: INVALID
dmi.product.version: Lenovo B460e
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: apport-bug cosmic i386 third-party-packages
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https://bugs.launchpad.net/bugs/1786048
Title:
display brightness not working
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