Hello!
I have a laptop ASUS Vivobook D1603QA (with AMD).
After installing amdgpu drivers there is no screen brightness adjustment. It is not adjustable from the keyboard (using special knobs) and there is no "slider" in the interface.
I deleted and reinstalled the drivers for the video card (AMD Radon) - nothing changes.
At the same time, if I boot from a flash drive (in live mode), everything works fine.
I read on the Internet that it is necessary to edit the config, but I don't have it as it should be.
cat /etc/default/grub | grep back
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Additional info.
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Codename: jammy
sudo lspci -vnn | grep -A10 VGA
03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [1002:1638] (rev c6) (prog-if 00 [VGA controller])
Subsystem: ASUSTeK Computer Inc. Cezanne [1043:12ad]
Flags: bus master, fast devsel, latency 0, IRQ 47, IOMMU group 10
Memory at ffe0000000 (64-bit, prefetchable) [size=256M]
Memory at fff0000000 (64-bit, prefetchable) [size=2M]
I/O ports at f000 [size=256]
Memory at fce00000 (32-bit, non-prefetchable) [size=512K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [64] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable- Count=1/4 Maskable- 64bit+
Code:
$ sudo lspci -k | grep -iA2 VGA
03:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Cezanne (rev c6)
Subsystem: ASUSTeK Computer Inc. Cezanne
Kernel driver in use: amdgpu
Please help to solve the problem.
