I could not get Brasero to work either. It kept saying unknown fault.
Then it would eject the disk. After many attempts, I replaced the
drive. It was older, but known to be good. No help.
On advice from the forum, I tried Xfburn. Sometimes it says it cant
unmount the media, sometimes it says
My problem with Brasero started after upgrade to 10.04. The first thing
I noticed was that the disk would not eject automatically. Instead a
window told me to eject the disk manually. I could still burn images
however. I actually made a copy of the 10.04 install disk to take to
work last
