I have this problem since I updated to .33 (ARCH), and it is still with .34 (ck).
I use very minimal DE, with thunar+hal automounting. Automounting works with usb drives/memory cards but not with cd.

This is dmesg output:


sr0: CDROM not ready. Make sure there is a disc in the drive.
ata4: device not ready (errno=-16), forcing hardreset
ata4: soft resetting link
ata4.00: configured for UDMA/25
sr0: CDROM (ioctl) error, command: cdb[0]=0x51 51 00 00 00 00 00 00 00 02 00
sr: Sense Key : 0xb [current] [descriptor]
sr: ASC=0x0 ASCQ=0x0
ata4: EH complete
sr0: CDROM (ioctl) error, command: cdb[0]=0x43 43 02 00 00 00 00 aa 00 0c 00
sr: Sense Key : 0x3 [current]
sr: ASC=0x57 ASCQ=0x0
sr 3:0:0:0: [sr0] CDB: cdb[0]=0x28: 28 00 00 00 00 00 00 00 01 00
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0
sr 3:0:0:0: [sr0] Unhandled sense code
sr 3:0:0:0: [sr0] Result: hostbyte=0x00 driverbyte=0x08
sr 3:0:0:0: [sr0] Sense Key : 0x3 [current]
sr 3:0:0:0: [sr0] ASC=0x10 <<vendor>> ASCQ=0x90
sr 3:0:0:0: [sr0] CDB: cdb[0]=0x28: 28 00 00 00 00 00 00 00 01 00
end_request: I/O error, dev sr0, sector 0
Buffer I/O error on device sr0, logical block 0


mount -t auto /dev/sr0 /media/cd just hangs, no results.
mount -t udf,iso9660 /dev/sr0 /media/cd , better then usuall it does not hang.

I have tried with different optical media, few cd's, few dvd's.

P.S.
Burning does not work too, I have tried with all utils in repo and with nero-linux.