Tested with todays AMIs (ami-59ed2a30 (64bit) and ami-7fed2a16 (32bit) and got the expected results:
dmesg|grep Mem [ 0.000000] Memory: 590612k/637952k available (6213k kernel code, 448k absent, 46892k reserved, 6901k data, 904k init) cat /proc/meminfo |head -1 MemTotal: 606248 kB uname -m x86_64 uname -a Linux ip-10-112-99-32 3.0.0-6-virtual #7-Ubuntu SMP Wed Jul 20 16:45:00 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux dmesg|grep Mem [ 0.000000] Memory: 599956k/637952k available (5527k kernel code, 37548k reserved, 2652k data, 720k init, 0k highmem) cat /proc/meminfo |head -1 MemTotal: 609968 kB uname -m i686 uname -a Linux domU-12-31-39-0C-09-3C 3.0.0-6-virtual #7-Ubuntu SMP Wed Jul 20 17:40:18 UTC 2011 i686 i686 i386 GNU/Linux Will close this report as fixed. ** Changed in: linux (Ubuntu) Status: Triaged => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/790609 Title: EC2: 2.6.39 oneiric kernel only sees 525MB total memory on t1.micro To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/790609/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs