Radeon

- The Radeon hardware was tested with the following non-stock options:

• disabling swap buffers wait from the xorg.conf (SwapbuffersWait),
• enabling 2D color tiling (ColorTiling and ColorTiling2D in xorg.conf),
• and enabling PCI Express 2.0 support (radeon.pcie_gen2=1 as a kernel command-line parameter).

It is silly that these non-default options are still needed for the open-source driver that AMD officially supports, but that is how it stands right now.