Aah.. so it is detected correctly by the LiveCDs. In that case it is a simple case of the Desktop version of kernel (-generic) not being configured to handle more than 4Gb memory. You have two options:
1. Use the precompiled -server kernel that is configured to use upto 64Gb of memory OR 2. Compile your own -generic kernel with CONFIG_HIGHMEM64G set ** Changed in: ubuntu Status: New => Won't Fix -- 8.04 i386 -generic kernel seeing 3GB RAM on 64-bit 8GB RAM system https://bugs.launchpad.net/bugs/217309 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