You have been subscribed to a public bug:
whenever I boot into Ubuntu the grub 2 boot loader have maximum brightness but
after selecting Ubuntu OS, system return to its normal brightness value ,
previously my Ubuntu version is 19.04 and this problem exists but after
upgrading to 19.10 this issue still there and nothing works by upgrading
system, grub remains at high brightness value (even function keys not working
at that time). Every time i reboot the system the grub 2 have max brightness
and it returns to normal brightness after reaching to log on screen and then
everything works fine even functions keys also working.
laptop specs:
AMD reyzen 3 2200u
AMD Radeon Vega 3
HP g7 245
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: xorg 1:7.7+19ubuntu12
ProcVersionSignature: Ubuntu 5.0.0-32.34-generic 5.0.21
Uname: Linux 5.0.0-32-generic x86_64
ApportVersion: 2.20.11-0ubuntu8
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Thu Oct 24 21:52:44 2019
DistUpgraded: Fresh install
DistroCodename: eoan
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series /
Radeon Vega Mobile Series] [1002:15dd] (rev c5) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company Raven Ridge [Radeon Vega Series / Radeon
Vega Mobile Series] [103c:8562]
MachineType: Hewlett-Packard HP 245 G7 Notebook PC
ProcEnviron:
LANGUAGE=en_IN:en
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_IN
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-32-generic
root=UUID=380079ae-40a6-4aed-8280-2b263a41cf1e ro quiet splash
acpi_backlight=vendor quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/03/2019
dmi.bios.vendor: AMI
dmi.bios.version: F.42
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 8562
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 84.24
dmi.chassis.asset.tag: 5CG9212QLP
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAMI:bvrF.42:bd07/03/2019:svnHewlett-Packard:pnHP245G7NotebookPC:pvr:rvnHewlett-Packard:rn8562:rvr84.24:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.family: 103C_5336AN HP 200
dmi.product.name: HP 245 G7 Notebook PC
dmi.product.sku: 6JM93PA#ACJ
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.99-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.1-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.5+git20191008-0ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.0.1-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: amd64 apport-bug eoan ubuntu
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Only GRUB2 have MAX BRIGHTNESS in 19.04 and 19.10
https://bugs.launchpad.net/bugs/1849711
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