Assuming you meant "linux-image-extra-<version>-generic" - this does resolve the problem. (there is no package linux-kernel-extras).
Additionally, although the gadgetfs module is present, mounting it fails: al@al-desktop:~$ sudo mount -t gadgetfs none /dev/gadget mount: unknown filesystem type 'gadgetfs' I believe this is happening because the module dummy_hcd is missing. This module is required for gadget_fs to function on x86 platforms which do not have any real gadget capable hardware. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1073089 Title: ubuntu kernel does not support gadgetfs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1073089/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs