[SLUG] Writing Double layer DVD-R - problems

[bill <billb@xxxxxxxxxxxxxxx>]

I've tried Kubuntu 8.04, Xubuntu 9.04 and LinuxMint7 (Ubuntu 9.04 I 
think) on different PCs with different DVD-RW drives.

All drives will "copy" a double layer DVD to an .iso file, but none will 
record the .iso to an 8.4 gb double layer (single-sided) DVD+R (Teac).

I've googled endlessly and while I find many with the same problem, 
nobody seems to have a solution.

Many posts mention mkisofs and how it is no longer included in Ubuntu, 
having been replaced with genisoimage and I've found posts that say that 
double-layer dvd's can be burned under Suse, I havent found anything 
mentioned about being able to do the same under Ubuntu (or derivatives).

My LG GSA-4613B dvd-rw sees the blank disk correctly, as do my other 
DVD-RW drives, but none will write.

I have set the DVD size to 8.4gb in K3b, and I have tried Brasero and 
Gnomebaker. None will burn.

Any advice or links  appreciated, else I'll do a temp install of Suse to 
see if that does work.

Thanks

Bill