Comment 22 for bug 198319

Same problem on Thinkpad T60 running 3.0.0-14-generic with a non-native but compatible CD drive (took it from a T40, iirc): /dev/sr0 only created with acpi=off boot parameter. There is no BIOS setting to disable the drive (re comment #18). The drive model is in the log (during acpi=off boot only):

kernel: [ 1.043753] scsi 1:0:0:0: CD-ROM HL-DT-ST DVD-ROM GDR8083N 0K03 PQ: 0 ANSI: 5
kernel: [ 1.050088] sr0: scsi3-mmc drive: 10x/24x cd/rw xa/form2 cdda tray
kernel: [ 1.050092] cdrom: Uniform CD-ROM driver Revision: 3.20
kernel: [ 1.050215] sr 1:0:0:0: Attached scsi CD-ROM sr0

The drive used to be detected by Ubuntu fine at some point in the past (I don't remember if this was before or after grub->grub2 update, but I don't think I ever used lilo). Should this bug be marked as a [regression]? Is there any debugging information that can be provided? Should we file an upstream report if it has been positively determined that this is induced by grub?