[ubuntu] Graphics card not working after upgrade to 11.04 Natty Narwhal

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http://ubuntuforums.org – Hi all, Until yesterday I had a very happy computer running on Ubuntu 10.10. My problems started when I upgraded to 11.04 Natty from a CD. Natty would crash after a few lines of the installation screen. I removed one by one the hardware components until I found the culprit: the graphics card (ATI Technologies Inc RV515 [Radeon X1300] sitting on a PCI express slot). I switched the BIOS system to the built-in graphics card (Intel Corporation 82915G/GV/910GL Integrated Graphics Controller) and the installation proceeded OK. Since I really like my (more expensive) Radeon X1300 I started to (Hardware)