Hi Valerio,

please do not remove people from the CC list because they're following the
discussion too, thanks.

Hi Boris, first thank you for giving me that hint: kmail it's really my email client and it's guilty for the behaviour of cut and pasted text...

Next time just save the email in a text file and then try applying the patch in
it - I think this way works.

I've just tried your patch above and it doesn't work and I have noticed a lot of messages during boot (see below).

Yep, it is _not_ supposed to work but instead tell us exactly why/which commands
puzzle your cdrom drive so that it turns off dma.

[.. ]

[  182.374511] Disabling dma for ATA_PC, queue_dma_alignment: 0x1f, q->dma_pad_mask: 0xf,addr: 0xffff8800ab52a000, rq->data_len: 0x8, on_stack: 0

Can you now try this new patch I've attached below (before that revert the old
one by doing "patch -p1 -R < [file.patch]" recompile the kernel with it, reboot),
start simulated burning on your machine and then cancel it shortly thereafter.
Now do

dmesg > log.msg

and send me the _whole_ file so that we can see the messages you get while
burning.

Thanks.

-- 
Regards/Gruss,
    Boris.