On August 8, kernel version 3.1-rc1 was posted on kernel.org. After compiling and updating the kernel on Ubuntu 11.04, Natty Narwahl was happy to find a solution to a number of critical graphics issues. It is normal to make the 11th Ubuntu work on my core i7-2600 Sandy Bridge with previous versions of the kernel failed.
Now you can safely wait for the October release of Oneiric Ocelot, the risk of the need for iron replacement is leveled.