It is also possible that you are running recovery mode which basically skips many drivers, including VGA drivers.
You may want to install proprietary Nvidia GPU Drivers (example: https://www.cyberciti.biz/faq/ubuntu-linux-install-nvidia-driver-latest- proprietary-driver/) and reboot. I noticed you upgraded your Ubuntu from 20.10 to 21.04. Will you be able to run native 21.04 (ex. running from usb live) and check whether you can have brightness control without recovery mode? -- 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/1934464 Title: Brightness control is missing on HP Pavilion Gaming Laptop 15-dk0xxx Status in linux package in Ubuntu: New Bug description: No brightness settings. Also black screen for login if I choose not recovery mode for login. ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: linux-image-5.11.0-22-generic 5.11.0-22.23 ProcVersionSignature: Ubuntu 5.11.0-22.23-generic 5.11.21 Uname: Linux 5.11.0-22-generic x86_64 ApportVersion: 2.20.11-0ubuntu65.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ter 3433 F.... pulseaudio /dev/snd/controlC1: ter 3433 F.... pulseaudio CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Fri Jul 2 10:33:31 2021 InstallationDate: Installed on 2021-06-25 (6 days ago) InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022) MachineType: HP HP Pavilion Gaming Laptop 15-dk0xxx ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-22-generic root=UUID=a7c41e63-e7ea-43e0-9de0-55322f489ee5 ro recovery nomodeset dis_ucode_ldr RelatedPackageVersions: linux-restricted-modules-5.11.0-22-generic N/A linux-backports-modules-5.11.0-22-generic N/A linux-firmware 1.197.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/16/2020 dmi.bios.release: 15.33 dmi.bios.vendor: Insyde dmi.bios.version: F.33 dmi.board.asset.tag: Type2 - Board Asset Tag dmi.board.name: 85FB dmi.board.vendor: HP dmi.board.version: 42.42 dmi.chassis.asset.tag: Chassis Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.ec.firmware.release: 42.42 dmi.modalias: dmi:bvnInsyde:bvrF.33:bd07/16/2020:br15.33:efr42.42:svnHP:pnHPPavilionGamingLaptop15-dk0xxx:pvrType1ProductConfigId:rvnHP:rn85FB:rvr42.42:cvnHP:ct10:cvrChassisVersion: dmi.product.family: 103C_5335KV HP Pavilion dmi.product.name: HP Pavilion Gaming Laptop 15-dk0xxx dmi.product.sku: 2C7M8EA#ACB dmi.product.version: Type1ProductConfigId dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1934464/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
