disable MTP udev rules for specific device so it can be mount as a USB Mass Storage device

Question

I have a problem with a specific device that is not an android / mobile device.
It is a media player with an internal hard drive that I am trying to connect as a mass storage device so I can copy movies/series too and from it.

I see the following when I connect it to my system

kernel: usb 1-4: new high-speed USB device number 7 using xhci_hcd
systemd[1]: Starting Cleanup of Temporary Directories...
systemd[1]: Started Cleanup of Temporary Directories.
mtp-probe[4978]: checking bus 1, device 7: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-4"
kernel: usb 1-4: can't set config #1, error -110
mtp-probe[4978]: bus: 1, device: 7 was not an MTP device
kernel: usb 1-4: USB disconnect, device number 7

lsusb shows me

Bus 001 Device 008: ID 174c:5106 ASMedia Technology Inc. ASM1051 SATA 3Gb/s bridge
Couldn't open device, some information will be missing
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x174c ASMedia Technology Inc.
  idProduct          0x5106 ASM1051 SATA 3Gb/s bridge
  bcdDevice            0.01
  iManufacturer           2 
  iProduct                3 
  iSerial                 1 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           32
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xc0
      Self Powered
    MaxPower                0mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         8 Mass Storage
      bInterfaceSubClass      6 SCSI
      bInterfaceProtocol     80 Bulk-Only
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0

My kernel and distro

uname -a
Linux aaron-pc 4.9.24-1-MANJARO #1 SMP PREEMPT Fri Apr 21 08:32:28 UTC 2017 x86_64 GNU/Linux

nelaaro · Accepted Answer · 2023-01-18T13:01:26.383

After much reading and testing.

I found out that this is related to a recent change in the default Udev rules to set a catch-all rule for devices to be handled by MTP if they don't match any other udev rules for USB devices.

Instead of my device being mounted as a USB mass storage device as it used to.

I found that I need to let udev know that this device should be managed a USB mass storage device instead of the MTP catch all rule

First I need my devices ID. Below it is the last one in the list

$ lsusb                                                                                                             
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 8087:0a2a Intel Corp. 
Bus 001 Device 002: ID 04f2:b51d Chicony Electronics Co., Ltd 
Bus 001 Device 006: ID 04e8:6860 Samsung Electronics Co., Ltd Galaxy (MTP)
Bus 001 Device 005: ID 0b05:181b ASUSTek Computer, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 007: ID 174c:5106 ASMedia Technology Inc

I am sure there is more to this then what I have here, but this works for me. I take the device ID which 174c:5106 and replace it in the udev rules below.

$ cat /etc/udev/rules.d/90-myrules.rules 
SUBSYSTEMS=="usb", ENV{MODALIAS}=="usb:174c:5106", ENV{MODALIAS}="usb-storage"

You will need to get udev to restart/reload to update the rules.

systemctl reload systemd-udevd.service

or

systemctl restart systemd-udevd

I now see the following in my system logs

journalctl -fe
kernel: usb 1-2: USB disconnect, device number 9
kernel: usb 1-2: new high-speed USB device number 10 using xhci_hcd
mtp-probe[9850]: checking bus 1, device 10: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2"
mtp-probe[9850]: bus: 1, device: 10 was not an MTP device
kernel: usb-storage 1-2:1.0: USB Mass Storage device detected
kernel: scsi host3: usb-storage 1-2:1.0
kernel: usbcore: registered new interface driver usb-storage
kernel: usbcore: registered new interface driver uas
kernel: scsi 3:0:0:0: Direct-Access     ST310005 24AS             JC4B PQ: 0 ANSI: 0
kernel: sd 3:0:0:0: Attached scsi generic sg2 type 0
kernel: sd 3:0:0:0: [sdb] 1953525168 512-byte logical blocks: (1.00 TB/932 GiB)
kernel: sd 3:0:0:0: [sdb] Write Protect is off
kernel: sd 3:0:0:0: [sdb] Mode Sense: 23 00 00 00
kernel: sd 3:0:0:0: [sdb] No Caching mode page found
kernel: sd 3:0:0:0: [sdb] Assuming drive cache: write through
kernel:  sdb: sdb1
kernel: sd 3:0:0:0: [sdb] Attached SCSI disk

Eugen Konkov · Answer 2 · 2018-01-12T13:41:26.963

First copy the file /lib/udev/rules.d/69-libmtp.rules to /etc/udev/rules.d/69-libmtp.rules:

$ sudo cp /lib/udev/rules.d/69-libmtp.rules /etc/udev/rules.d/69-libmtp.rules

At the top of this file you can find:

# Some sensitive devices we surely don't wanna probe
ATTR{idVendor}=="0670", GOTO="libmtp_rules_end"
ATTR{idVendor}=="0471", ATTR{idProduct}=="083f", GOTO="libmtp_rules_end"

Then exclude the device from mtp-probe by adding next line after mentioned lines:

ATTR{idVendor}=="093a", ATTR{idProduct}=="2516", GOTO="libmtp_rules_end"

I found my USB device ID with lsusb shell command. It is 093a:2516

score -2 · Answer 3 · answered Mar 26 '20 at 18:31

I'm experimenting peripherical disconnections using thinkpad dock (here) Checking journalctl I found that last lines before disconnection shows mtp-probe device error, and I think the cause it could be the same exposed here but with my monitor. How could I find my devices in order to exclude them for mtp-probe?

My lsusb:

Bus 002 Device 008: ID 17ef:1010 Lenovo Lenovo ThinkPad Dock   
Bus 002 Device 002: ID 0bda:0316 Realtek Semiconductor Corp. USB3.0-CRW
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 138a:0097 Validity Sensors, Inc. 
Bus 001 Device 005: ID 5986:2118 Acer, Inc Integrated Camera
Bus 001 Device 030: ID 046d:c084 Logitech, Inc. G203 Gaming Mouse
Bus 001 Device 029: ID 17ef:100f Lenovo Lenovo ThinkPad Dock   
Bus 001 Device 028: ID 17ef:1010 Lenovo Lenovo ThinkPad Dock   
Bus 001 Device 027: ID 04b4:1007 Cypress Semiconductor Corp. 
Bus 001 Device 008: ID 2386:340e Raydium Corporation Raydium Touch System
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

disable MTP udev rules for specific device so it can be mount as a USB Mass Storage device

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