USB device failing to automount (Kobo reader)

[Chris Green <cl@isbd.net>]

I have a Kobo Forma reader (like a Kindle), on xubuntu versions up to
24.04 it automounted without problems.  Now I'm running Debian 12 it's
failing to automount, I can't mount it manually either.

I get the usual messages at the Kobo end and fdisk shows me /dev/sdc
but no file system appears.  In dmesg I see:-

    [210397.607735] /dev/scd: Can't open blockdev
    [210446.971129] usb 1-1: USB disconnect, device number 5
    [210447.028493] sd 3:0:0:0: [sdc] Synchronizing SCSI cache
    [210447.028615] sd 3:0:0:0: [sdc] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
    [210459.880506] usb 1-1: new high-speed USB device number 6 using xhci_hcd
    [210460.031177] usb 1-1: New USB device found, idVendor=2237, idProduct=4229, bcdDevice= 4.01
    [210460.031200] usb 1-1: New USB device strings: Mfr=3, Product=4, SerialNumber=5
    [210460.031212] usb 1-1: Product: eReader-4.38.23038
    [210460.031221] usb 1-1: Manufacturer: Kobo
    [210460.031229] usb 1-1: SerialNumber: N782870000514
    [210460.035451] usb-storage 1-1:1.0: USB Mass Storage device detected
    [210460.035948] scsi host3: usb-storage 1-1:1.0
    [210461.041989] scsi 3:0:0:0: Direct-Access     Linux    File-Stor Gadget 0401 PQ: 0 ANSI: 2
    [210461.043013] sd 3:0:0:0: Attached scsi generic sg2 type 0
    [210461.043534] sd 3:0:0:0: Power-on or device reset occurred
    [210461.056884] sd 3:0:0:0: [sdc] 14143101 512-byte logical blocks: (7.24 GB/6.74 GiB)
    [210461.057201] sd 3:0:0:0: [sdc] Write Protect is off
    [210461.057205] sd 3:0:0:0: [sdc] Mode Sense: 0f 00 00 00
    [210461.057597] sd 3:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
    [210461.060279]  sdc:
    [210461.066840] sd 3:0:0:0: [sdc] Attached SCSI removable disk

Do I need a Windows/DOS driver of some sort? Or has something else gone wrong?


-- 
Chris Green
·