For a long time the AMD RX480 display looked too bright or milky on Linux.
Describe the issue
I am using Fedora 34, I have tested on archlinux, ubuntu, pop!_os, voidlinux .... Tested on them and they are all too bright. I have replaced all hardware in the last year except the display card.
The monitor is always too bright after booting into Linux，but I can improve it by pressing the contrast button once after each boot. For example, the current contrast of the monitor is 50%, press the contrast button once to adjust it to 49% and the monitor will get the correct brightness and contrast.
This issue also happened on Windows, but has been fixed long ago.
See details: https://community.amd.com/t5/drivers-software/why-does-my-display-look-too-bright-or-milky-on-rx-480/td-p/334656
One might question what the difference in display after pressing the monitor button has to do with Linux? Same device, same action, almost no change in Windows 10.
I have tried ddcutil, but unfortunately my monitor does not support the "DDC/CI" protocol.
I'm sorry, english is not my native language :D
Regards.
Hardware specifications
| Name | Description |
|---|---|
| RAM | G.SKILL Ripjaws4 DDR4 3000 16GB |
| CPU | AMD Ryzen 7 2700 |
| GPU | RX480 X-Serial 8G LE Discrete graphics |
| Mobo | Gigabyte X470 AORUS ULTRA GAMING |
| WNIC | Intel Wireless-AC 9260 |
| SSD | SamSung 970 EVO PLUS NVME m.2 500GiB |
| Screen | ASUS XG32VQ 31.5” |
linux-firmware and mesa
mesa-libglapi-21.1.1-1.fc34.x86_64
mesa-libgbm-21.1.1-1.fc34.x86_64
mesa-libEGL-21.1.1-1.fc34.x86_64
mesa-vulkan-drivers-21.1.1-1.fc34.x86_64
mesa-filesystem-21.1.1-1.fc34.x86_64
mesa-dri-drivers-21.1.1-1.fc34.x86_64
mesa-libGL-21.1.1-1.fc34.x86_64
mesa-libGLU-9.0.1-4.fc34.x86_64
linux-firmware-whence-20210511-120.fc34.noarch
linux-firmware-20210511-120.fc34.noarch