Comment 6 for bug 162474

i have the same problem with 8:4, hardy heron. when watching dvd's (protected and otherwise), about 30-40 minutes into viewing, the dvd it randomly unmounts both the dvd, and the dvd drive. 'sudo mount -a' doesnt restore the drive, but powering down for 10 minutes and rebooting does.

will post 'dmesg | tail' when it next happens.