Comment 18 for bug 436767

I've just (accidentaly) discovered something new: if the disc is already inserted when booting, everything seems to work normally. The disc is mounted, accessible and can be ejected/unmounted. The 'unaligned read' errors are also missing from dmesg. Even better: re-inserting the disc also triggers normal behaviour (i.e. auto-mounting works , the disc can be ejected and no read errors).

However, when I restart the machine without the disc inserted, all errors are back again, including the 'unaligned read'. This is getting weirder with each test....