cd burning failure with auto speed or higher than x8

[klerfayt]

K3b Version: 1.0.3
Kernel: 2.6.22-12-generic
MATSHITA UJ-840D 1.00 (/dev/scd0, )
cdrecord: 1.1.6
os: Kubuntu Gutsy Gibbon

I got 3 cds now with broken burns, 1st is with autospeed, 2nd is with autospeed but run with 'kdesudo k3b', 3rd is speedx12

error seems to occur then 30% is burned, error itself is as follows:
Errno: 5 (Input/output error), write_g1 scsi sendcmd: no error

despite failing to burn with autospeed, I can still burn without errors then speed is set to x8

[klerfayt (klerfayt-deactivatedaccount)]

I guess it's also important to note that burning cds with autospeed has not been an issue in the past with kubuntu 7.04, etc.

[klerfayt (klerfayt-deactivatedaccount)]

strange I bought different cd-r pack (25 spindle):
Verbatim DataLifePlus CD-R 52x 700MB --> double protection, super azo, crystal
and no errors with autospeed burn, tested with iso burning and data cd (more than 600MB) burning

the ones that give me error with autospeed are:
Verbatim CD-R 52x 700MB http://i18.ebayimg.com/04/i/06/1b/a5/92_1_sbl.JPG

[klerfayt (klerfayt-deactivatedaccount)]

^^previous one contains error in spelling "iso burn"