Error burning CD

[ros]

Trying to burn a RW CDROM, I notice the CD-ROM device was freeze and
nothing happen. After a hard reboot (I turn off completly the computer),
I find this message on the /var/log/message file

Dec  3 19:04:40 bill kernel: acd0: req=0xc24e5258 SEND_OPC_INFO
semaphore timeout !! DANGER Will Robinson !!
Dec  3 19:04:42 bill kernel: acd0: req=0xc2063258 SETFEATURES SET
TRANSFER MODE semaphore timeout !! DANGER Will Robinson !!