My graphics card's kernel driver is not compatible with the Vulkan API. How do I resolve this?

Please note: This FAQ tells you how to force your graphics card to use the amdgpu kernel driver. This is considered experimental on older AMD graphics cards and may cause system instability; you follow these instructions at your own risk.

AMD 200 and 300 series graphics cards based on the 1st or 2nd generation Graphics Core Next micro-architecture use the radeon kernel driver by default. Rise of the Tomb Raider™: 20 Year Celebration uses the Vulkan graphics API, which requires the amdgpu kernel driver. You can force your graphics card to use the amdgpu kernel driver but may experience system instability.

To force your graphics card to use the amdgpu kernel driver, follow the instructions below:

For users running Ubuntu 17.10 or later

1. Open Terminal and enter the following command:
   xhost +si:localuser:root; sudo gedit /etc/default/grub

2. When prompted, enter your password.

3. A text editor window will open. Find the following line:
   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

4. Change the line to the following:
   GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.si_support=0 radeon.cik_support=0 amdgpu.si_support=1 amdgpu.cik_support=1"

5. Save the file and exit the editor.

6. Open Terminal and enter the following command:
   sudo update-grub

7. Reboot your computer.

Rise of the Tomb Raider™: 20 Year Celebration will now run on your computer.