This is expected as the default boot sequence doesn't expect the user to provide an uInitrd. The hanging you're seeing is probably because of wrong cmdline arguments, as you're also just using the default one instead of the supported one by ubuntu.
Marking it as Invalid, but let me know if this is a valid use case for Ubuntu and we can try to create a fix for it. ** Changed in: u-boot-linaro (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/820113 Title: uboot fails to automatically load uInitrd and boot hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/u-boot-linaro/+bug/820113/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs