I was able to resolve this. I issued a `shutdown -F now`, but the box simply entered single-user mode. I remounted root as read only by doing `mount -o remount,ro /` and then fired off `e2fsck /dev/root` and it fixed the bitmap issue. I rebooted immediately after e2fsck since the filesystem was modified.
For the record, I am running Ubilinux, as was the OP. In addition to fixing the bitmap, there were some inode issues AND lost+found was created since the Ubilinux install left that out, strangely enough.
I've seen a few posts now regarding the ext4 filesystem errors after flashing ubilinux, but surprisingly I haven't found any posts on the resolution. For those with similar problems, the following steps should fix.
- Connect USB cable to the serial console port of the edison and to your computer. Provide power if need be via a second cable connected to the other USB port, or via a DC-IN to the barrel jack. You must use serial since you will be entering single-user mode and stopping networking.
- Open up the console and log in as root. Linux/mac users can do `screen /dev/someTTYdevice 115200` Windows users, use PuTTY or something.
- Once logged in as root, fire off the following commands, saying 'yes' to the e2fsk prompts.
- init 1
- mount -o remount,ro /
- e2fsck /dev/root
- reboot
- Verify that there are no more ext4_mb_generate_buddy errors during the startup.