I have a similar problem. I'm using Ubuntu 10.10 x64 on a AMD Athlon X2 64 4800 with ATI HD2600XT and 2GB RAM. Today I wanted to upgrade my RAM to 4GB. After I've installed the new RAM the locks up after the Ubuntu loading screen. If I remove any memory chip the PC boots ok. Also if I boot in Xfailsafe mode every thing is ok. So I did some searching and there are quite a few people having this problem. It's something related to video memory overlapping the high memory around the 4GB margin (if I remember correctly)
More infos here: http://www.rage3d.com/board/showthread.php?t=33821469 Hope it helps. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/578028 Title: Blank screen on boot _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
