Public bug reported:
After installing the low-latency kernel i cant adjust the screen
brightness, I'm using Ubuntu 18.04.6 lts, i used the native low-latency
kernel
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-202-lowlatency 4.15.0-202.213
ProcVersionSignature: Ubuntu 4.15.0-202.213-lowlatency 4.15.18
Uname: Linux 4.15.0-202-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7.28
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Jan 25 14:17:29 2023
InstallationDate: Installed on 2023-01-24 (1 days ago)
InstallationMedia: Ubuntu 18.04.6 LTS "Bionic Beaver" - Release amd64 (20210915)
MachineType: LENOVO 82C7
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-202-lowlatency
root=UUID=58a8be88-a6d6-4fa5-888b-edb27af2d4b8 ro acpi_backlight=vendor quiet
splash vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-202-lowlatency N/A
linux-backports-modules-4.15.0-202-lowlatency N/A
linux-firmware 1.173.21
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/23/2022
dmi.bios.vendor: LENOVO
dmi.bios.version: E8CN36WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo V15-ADA
dmi.modalias:
dmi:bvnLENOVO:bvrE8CN36WW:bd05/23/2022:svnLENOVO:pn82C7:pvrLenovoV15-ADA:rvnLENOVO:rnLNVNB161216:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrLenovoV15-ADA:
dmi.product.family: V15-ADA
dmi.product.name: 82C7
dmi.product.version: Lenovo V15-ADA
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug bionic
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https://bugs.launchpad.net/bugs/2003897
Title:
No screen brightness
Status in linux package in Ubuntu:
Confirmed
Bug description:
After installing the low-latency kernel i cant adjust the screen
brightness, I'm using Ubuntu 18.04.6 lts, i used the native low-
latency kernel
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-202-lowlatency 4.15.0-202.213
ProcVersionSignature: Ubuntu 4.15.0-202.213-lowlatency 4.15.18
Uname: Linux 4.15.0-202-lowlatency x86_64
ApportVersion: 2.20.9-0ubuntu7.28
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Wed Jan 25 14:17:29 2023
InstallationDate: Installed on 2023-01-24 (1 days ago)
InstallationMedia: Ubuntu 18.04.6 LTS "Bionic Beaver" - Release amd64
(20210915)
MachineType: LENOVO 82C7
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-202-lowlatency
root=UUID=58a8be88-a6d6-4fa5-888b-edb27af2d4b8 ro acpi_backlight=vendor quiet
splash vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.15.0-202-lowlatency N/A
linux-backports-modules-4.15.0-202-lowlatency N/A
linux-firmware 1.173.21
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/23/2022
dmi.bios.vendor: LENOVO
dmi.bios.version: E8CN36WW
dmi.board.asset.tag: No Asset Tag
dmi.board.name: LNVNB161216
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697WIN
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo V15-ADA
dmi.modalias:
dmi:bvnLENOVO:bvrE8CN36WW:bd05/23/2022:svnLENOVO:pn82C7:pvrLenovoV15-ADA:rvnLENOVO:rnLNVNB161216:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrLenovoV15-ADA:
dmi.product.family: V15-ADA
dmi.product.name: 82C7
dmi.product.version: Lenovo V15-ADA
dmi.sys.vendor: LENOVO
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