``trans``
Log generic translation messages
+r300 driver environment variables
+---------------------------------
+
+:envvar:`RADEON_DEBUG`
+ a comma-separated list of named flags, which do various things:
+
+ ``info``
+ Print hardware info (printed by default on debug builds
+ ``fp``
+ Log fragment program compilation
+ ``vp``
+ Log vertex program compilation
+ ``draw``
+ Log draw calls
+ ``swtcl``
+ Log SWTCL-specific info
+ ``rsblock``
+ Log rasterizer registers
+ ``psc``
+ Log vertex stream registers
+ ``tex``
+ Log basic info about textures
+ ``texalloc``
+ Log texture mipmap tree info
+ ``rs``
+ Log rasterizer
+ ``fb``
+ Log framebuffer
+ ``cbzb``
+ Log fast color clear info
+ ``hyperz``
+ Log HyperZ info
+ ``scissor``
+ Log scissor info
+ ``msaa``
+ Log MSAA resources
+ ``anisohq``
+ Use high quality anisotropic filtering
+ ``notiling``
+ Disable tiling
+ ``noimmd``
+ Disable immediate mode
+ ``noopt``
+ Disable shader optimizations
+ ``nocbzb``
+ Disable fast color clear
+ ``nozmask``
+ Disable zbuffer compression
+ ``nohiz``
+ Disable hierarchical zbuffer
+ ``nocmask``
+ Disable AA compression and fast AA clear
+ ``use_tgsi``
+ Request TGSI shaders from the state tracker
+
Other Gallium drivers have their own environment variables. These may
change frequently so the source code should be consulted for details.