Comment 2 for bug 211760

I can confirm this problem with Hardy.

When I insert a USB thumb drive (I have tried several, so it isn't the one specific drive) I'm given a dialog of: "Cannot Mount Volume: Invald mount option when attempting to mount the volume 'ThumbDrive'"

The thumb drive has worked with Ubuntu since Breezy, at least. Installation is (was) a fresh Gutsy install from CD at Gutsy's release and upgraded to Hardy at Hardy's release through update-manger.

the dmesg output related to this is:

[ 2327.059203] usb-storage: device scan complete
[ 2327.060436] scsi 3:0:0:0: Direct-Access OTi Flash Disk 2.00 PQ: 0 ANSI: 2
[ 2328.134456] ready
[ 2328.135573] sd 3:0:0:0: [sda] 256000 512-byte hardware sectors (131 MB)
[ 2328.136450] sd 3:0:0:0: [sda] Write Protect is off
[ 2328.136458] sd 3:0:0:0: [sda] Mode Sense: 03 00 00 00
[ 2328.136464] sd 3:0:0:0: [sda] Assuming drive cache: write through
[ 2328.140099] sd 3:0:0:0: [sda] 256000 512-byte hardware sectors (131 MB)
[ 2328.141449] sd 3:0:0:0: [sda] Write Protect is off
[ 2328.141456] sd 3:0:0:0: [sda] Mode Sense: 03 00 00 00
[ 2328.141463] sd 3:0:0:0: [sda] Assuming drive cache: write through
[ 2328.141479] sda: unknown partition table
[ 2328.145029] sd 3:0:0:0: [sda] Attached SCSI removable disk
[ 2328.145157] sd 3:0:0:0: Attached scsi generic sg0 type 0

I'm assuming the entry "sda: unknown partition table" is the trouble spot here. The drive was originally FAT16, and was reformatted into FAT32 using Windows. Same entry. It appears in Nautilus with its name, just not mounted. I can manually mountunmount the drive using "sudo mount" and "sudo umount".

Also, an external USB hard drive (ntfs) is auto-mounted and useable, as well as the internal XP drive (ntfs).
I'd rather not use the above fix (sudo modprobe -r ehci_hcd) if it means slower use for all usb-mounted drives, as a slow external hard drive is a killer when backing up large amounts of data.