it seems that for some drives the disc capacity of blank discs can't be properly determined, yielding in a "no empty disc inserted" error in nautilus-cd-burner and brasero for example.
** (brasero:1359): WARNING **: No property volume.disc.capacity on device with id /org/freedesktop/Hal/devices/volume_empty_unknown
There's an Ubuntu bug about this here:
Which includes a patch that seems to work fine:
Would be nice to have this included in hal soonish :)
This is btw with hal 0.5.9.1 on Ubuntu (0.5.9.1-6ubuntu5), i.e. with a bunch of patches. None of those should affect this bug though...
(Seems to work of course means that it works fine for me)
(Patch is not by me but by David Castelow as can be seen in the Ubuntu bugreport)
Commited the patch