Ubuntu: Cannot mount audio CDs (but DVDs are fine)



Question:

I seem to have lost the ability to mount audio cds - maybe since upgrading to 17.04? - DVDs mount OK.

Nautilus says "Unable to access "Audio Disk" - Location is not mountable".

Trying to mount manually using sudo mount /dev/sr0 /media/cdrom1/ gives me:

mount: /dev/sr0 is write-protected, mounting read-only  mount: /dev/sr0: can't read superblock  

dmesg | tail then gives me:

[  125.618809] sr 4:0:0:0: [sr0] tag#2 CDB: Read(10) 28 00 00 00 00 00 00 00 02 00  [  125.618811] blk_update_request: I/O error, dev sr0, sector 0`  [  125.618813] Buffer I/O error on dev sr0, logical block 0, async page read  [  125.630802] Buffer I/O error on dev sr0, logical block 0, async page read  [  125.642801] Buffer I/O error on dev sr0, logical block 0, async page read  [  126.942709] EXT4-fs (sr0): unable to read superblock  [  127.070758] EXT4-fs (sr0): unable to read superblock  [  127.198797] EXT4-fs (sr0): unable to read superblock  [  127.326797] SQUASHFS error: squashfs_read_data failed to read block 0x0  [  127.326804] squashfs: SQUASHFS error: unable to read squashfs_super_block  

Also tried sudo mount /dev/sr0 /media/cdrom1/ -t iso9660 leading to:

mount: /dev/sr0 is write-protected, mounting read-only  mount: wrong fs type, bad option, bad superblock on /dev/sr0,     missing codepage or helper program, or other error       In some cases useful info is found in syslog - try     dmesg | tail or so.  

And dmesg | tail

[  127.326797] SQUASHFS error: squashfs_read_data failed to read block 0x0  [  127.326804] squashfs: SQUASHFS error: unable to read squashfs_super_block  [  147.129330] scsi_io_completion: 93 callbacks suppressed  [  147.129335] sr 4:0:0:0: [sr0] tag#18 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE  [  147.129337] sr 4:0:0:0: [sr0] tag#18 Sense Key : Illegal Request     [current]   [  147.129339] sr 4:0:0:0: [sr0] tag#18 Add. Sense: Illegal mode for this track  [  147.129341] sr 4:0:0:0: [sr0] tag#18 CDB: Read(10) 28 00 00 00 00 10 00 00 01 00  [  147.129342] blk_update_request: 93 callbacks suppressed  [  147.129343] blk_update_request: I/O error, dev sr0, sector 64  [  147.129367] isofs_fill_super: bread failed, dev=sr0, iso_blknum=16, block=16  

Not sure where to go from here so grateful for suggestions.

Thanks a lot


Solution:1

I've been troubleshooting this for a while and I just downgraded my package of udisks from 2.7.1-2 to 2.6.4-1 and rebooted gdm -- instant fix.

It seems there may have been a regression introduced in udisks. I don't see a bug yet, so one should likely need to be opened. If you're looking to play or rip the CDs a couple applications still can (those that don't use Udisks), so try VLC or CDparanoia which I've had good luck with, and then otherwise a fix will hopefully come as soon as possible.

Edit: The latest version of udisks 2.7.1-2 and libblockdev 2.10-1 seem to fix the issue as well. Hopefully the updates come down the pipe soon!


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