[ 1618.976511] sr 1:0:0:0: [sr0] tag#16 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 1618.976517] sr 1:0:0:0: [sr0] tag#16 Sense Key : Illegal Request [current]
[ 1618.976521] sr 1:0:0:0: [sr0] tag#16 Add. Sense: Read of scrambled sector without authentication
[ 1618.976526] sr 1:0:0:0: [sr0] tag#16 CDB: Read(10) 28 00 00 3a f1 80 00 00 40 00
[ 1619.072288] sr 1:0:0:0: [sr0] tag#18 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 1619.072297] sr 1:0:0:0: [sr0] tag#18 Sense Key : Illegal Request [current]
[ 1619.072305] sr 1:0:0:0: [sr0] tag#18 Add. Sense: Read of scrambled sector without authentication
[ 1619.072311] sr 1:0:0:0: [sr0] tag#18 CDB: Read(10) 28 00 00 3a f1 c0 00 00 40 00
[ 1619.148352] sr 1:0:0:0: [sr0] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 1619.148358] sr 1:0:0:0: [sr0] tag#19 Sense Key : Illegal Request [current]
[ 1619.148364] sr 1:0:0:0: [sr0] tag#19 Add. Sense: Read of scrambled sector without authentication
[ 1619.148369] sr 1:0:0:0: [sr0] tag#19 CDB: Read(10) 28 00 00 3a f2 00 00 00 40 00
[ 1619.236308] sr 1:0:0:0: [sr0] tag#21 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
[ 1619.236315] sr 1:0:0:0: [sr0] tag#21 Sense Key : Illegal Request [current]
[ 1619.236320] sr 1:0:0:0: [sr0] tag#21 Add. Sense: Read of scrambled sector without authentication
[ 1619.236326] sr 1:0:0:0: [sr0] tag#21 CDB: Read(10) 28 00 00 3a f2 40 00 00 40 00

can anyone tell me what this means?. not too sure if i should lodge a bug report until i know what this is.

i use the current version of handbrake-gtk from packman repo, all other dependencies are installed from the OSS repo