BuddyPress.org

Clarify: bp default theme works on the Linux Ubuntu install?

Setting cmod 777 on all directories won’t be the issue, if anything it’s a group/user permissions that is more often the issue there, but doubtful that this is the issue here and of course world writable is not something one would want to leave other than on a test install.

This may be an issue that you have to address to Suffusion support if it’s a case that plain vanilla WP/BP does work as expected on your LAMP box, but not with Suffusion themes activated.