A few days ago I tried mounting a new CD, but nothing happened. I tried again, with a CD I'd used before with the same results. I tried a DVD in the same drive and it mounted OK, so it's not hardware. (I haven't had time until now to report this.) The box is running F 14 and is fully updated. Below is the results from /var/log/messages saved from June 28:
Jul 28 14:07:21 khorlia kernel: [3792447.281593] sr 1:0:0:0: [sr0] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul 28 14:07:21 khorlia kernel: [3792447.281604] sr 1:0:0:0: [sr0] Sense Key : Illegal Request [current]
Jul 28 14:07:21 khorlia kernel: [3792447.281615] Info fld=0x10
Jul 28 14:07:21 khorlia kernel: [3792447.281619] sr 1:0:0:0: [sr0] Add. Sense: Illegal mode for this track
Jul 28 14:07:21 khorlia kernel: [3792447.281632] sr 1:0:0:0: [sr0] CDB: Read(10): 28 00 00 00 00 10 00 00 02 00
Jul 28 14:07:21 khorlia kernel: [3792447.281650] end_request: I/O error, dev sr0, sector 64
Jul 28 15:11:34 khorlia kernel: [3796300.929745] UDF-fs: Partition marked readonly; forcing readonly mount
Jul 28 15:11:34 khorlia kernel: [3796301.005947] UDF-fs INFO UDF: Mounting volume 'DVD', timestamp 2009/10/05 20:42 (1e5c)
Jul 28 15:11:34 khorlia hald: mounted /dev/sr0 on behalf of uid 500
Jul 28 15:11:58 khorlia hald: unmounted /dev/sr0 from '/media/DVD' on behalf of uid 500
I tried again today before posting this, but nothing shows up in the log. In fact, the messages above were still at the end of the log! I don't know what that means, but I'm reporting it because it may be significant. BTW, this box runs 24/7 and only reboots for a kernel update.