tobias@tobias-desktop:~$ dmesg | grep -i "CD"
[   33.152014] uhci_hcd 0000:00:1d.0: UHCI Host Controller
[   33.226126] uhci_hcd 0000:00:1d.0: new USB bus registered, assigned
bus number 1
[   33.226169] uhci_hcd 0000:00:1d.0: irq 16, io base 0x0000e000
[   33.328041] uhci_hcd 0000:00:1d.1: UHCI Host Controller
[   33.328081] uhci_hcd 0000:00:1d.1: new USB bus registered, assigned
bus number 2
[   33.328113] uhci_hcd 0000:00:1d.1: irq 17, io base 0x0000e400
[   33.431787] uhci_hcd 0000:00:1d.2: UHCI Host Controller
[   33.431835] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned
bus number 3
[   33.431873] uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000e800
[   33.583716] usb 1-1: new full speed USB device using uhci_hcd and address 2
[   34.333861] ata2.01: ATAPI: SAMSUNG CD-ROM  SC-140C, A101, max UDMA/33
[   34.662397] scsi 1:0:0:0: CD-ROM            TOSHIBA  DVD-ROM
SD-R5002 1S33 PQ: 0 ANSI: 5
[   34.662753] scsi 1:0:1:0: CD-ROM            SAMSUNG  CD-ROM SC-140C
 A101 PQ: 0 ANSI: 5
[   34.867848] ehci_hcd 0000:00:1d.7: EHCI Host Controller
[   34.867931] ehci_hcd 0000:00:1d.7: new USB bus registered, assigned
bus number 4
[   34.867988] ehci_hcd 0000:00:1d.7: debug port 1
[   34.868020] ehci_hcd 0000:00:1d.7: irq 20, io mem 0xfe77bc00
[   34.871911] ehci_hcd 0000:00:1d.7: USB 2.0 started, EHCI 1.00,
driver 10 Dec 2004
[   34.880862] sr0: scsi3-mmc drive: 40x/40x writer cd/rw xa/form2 cdda tray
[   34.880869] Uniform CD-ROM driver Revision: 3.20
[   34.883754] sr 1:0:0:0: Attached scsi CD-ROM sr0
[   34.891442] sr1: scsi3-mmc drive: 1x/40x cd/rw xa/form2 cdda tray
[   34.891806] sr 1:0:1:0: Attached scsi CD-ROM sr1
[   35.451287] usb 1-1: new full speed USB device using uhci_hcd and address 3
[  488.095071] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 1013.546376] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 1635.064868] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 1647.393023] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 1686.383484] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 1777.574493] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 2807.272538] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 2853.363267] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 2882.128624] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 2939.875603] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 4241.792650] usb 4-2: new high speed USB device using ehci_hcd and address 3
[ 5702.000770] usb 4-2: new high speed USB device using ehci_hcd and address 4
[ 5707.131812]  sdb:<6>usb 4-2: reset high speed USB device using
ehci_hcd and address 4
[ 5769.549787] usb 4-2: reset high speed USB device using ehci_hcd and address 4
[ 5769.758852] ehci_hcd 0000:00:1d.7: port 2 reset error -110
[ 5786.741343] usb 4-2: new high speed USB device using ehci_hcd and address 5
[ 5882.899895] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 5888.681367] sr1: CDROM not ready.  Make sure there is a disc in the drive.
[ 6022.671507] sr1: CDROM not ready.  Make sure there is a disc in the drive.