I'm having the exact same problem with my Radeon HD 3650. Only 256MB of the 512MB are detected according to Xorg.0.log. Apparently other linux users have the problem too - here's a Phoronix thread that talks about possible work around:
http://phoronix.com/forums/showthread.php?t=6648 I'm going to try it this weekend. Should this issue be submitted to ATI or is it truly a deeper problem? -- xserver detects only 256 of 512 MB video RAM https://bugs.launchpad.net/bugs/247887 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
