nouveau wiki, MesaDrivers
nv50 and nvc0
On February 28th, 2011, the original nv50 Gallium3D driver was completely replaced (in git) by the nvc0 Gallium3D driver ported to NV50 family of cards. For nvc0 and the new nv50 drivers, you have to use at least the 2.6.38 kernel or you will encounter memory corruption.
Bug reports for nv50 and nvc0 can be submitted by following the general reporting guidelines. Please, also follow the About bugs and problems section above.
Для остальных драйверов указано: Do not file bug reports about this driver.