Vulkan requires theamdgpu driver, it doesn't detect the graphics adapter when usingradeon.

If you're experiencing crashes or the game doesn't load at all, it's probably because your distribution defaults to theradeon driver and Vulkan may be using Intel's graphics adapter instead (if available).

If that's the case,amdgpu has to be enabled explicitly in the kernel commandline.

Open your terminal and runsudo nano /etc/default/grub.

Append toGRUB_CMDLINE_LINUX_DEFAULT:

• radeon.si_support=0 amdgpu.si_support=1 if you have a Southern Islands card.
• radeon.cik_support=0 amdgpu.cik_support=1 if you have a Sea Islands card.

For example:GRUB_CMDLINE_LINUX_DEFAULT="quiet radeon.cik_support=0 amdgpu.cik_support=1"

Note: You can safely append both variants if you are unsure which family your card belongs to.

Save withCTRL+X followed byY and thenEnter.

Runsudo update-grub and then reboot your system.

You can check which driver is loaded by runninglspci -k:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Hawaii PRO [Radeon R9 290/390]        Subsystem: PC Partner Limited / Sapphire Technology Hawaii PRO [Radeon R9 290/390]        Kernel driver in use: amdgpu        Kernel modules: radeon, amdgpu

If your desktop environment doesn't load, check the kernel log by runningsudo dmesg. If you see thatamdgpu is crashing, appendamdgpu.dc=0 to the kernel commandline.

https://wiki.archlinux.org/index.php/AMDGPU

https://wiki.gentoo.org/wiki/AMDGPU

Write a message inhttps://github.com/ValveSoftware/Proton/issues/813.