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[iOS 12.2] seems to break USB of iPad Pro Modular Synthesizers
Old 27th March 2019
  #1
Here for the gear
 

[iOS 12.2] seems to break USB of iPad Pro

Hi,

yesterday the upgrade from iOS 12.1.4 to iOS 12.2 most likely rendered USB of my iPad Pro 12.9-inch, 3rd gen, WiFi, 1 TB, Model MTFR2FD/A useless.

In short, if I connect the iPad Pro with my PC by USB, the connection randomly disappears. No connection anymore:
Code:
$ lsusb
Bus 004 Device 002: ID 8087:8000 Intel Corp. 
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 8087:8008 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 056d:4001 EIZO Corp. 
Bus 001 Device 003: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 002: ID 0451:8044 Texas Instruments, Inc. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
After reconnecting, in this case I had to do this two times, the iPad Pro is available again, named "Apple, Inc. iPad 4/Mini1":
Code:
$ lsusb
Bus 004 Device 002: ID 8087:8000 Intel Corp. 
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 8087:8008 Intel Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 056d:4001 EIZO Corp. 
Bus 001 Device 003: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 002: ID 0451:8044 Texas Instruments, Inc. 
Bus 001 Device 009: ID 05ac:12ab Apple, Inc. iPad 4/Mini1
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I don't know, if the iPad Pro still can use my USB audio device, but sharing files via iTunes is broken. Broken file sharing renders the iPad Pro useless for me.

I posted a more detailed report in German at https://communities.apple.com/de/thr...1#250261245621.

In the beginning I had good luck, so my first guess was, that the connection disappears only if USB is idle, but actually it was disconnected while transferring Cubasis files from the iPad Pro to the PC, too.

Regards,
Ralf
Old 27th March 2019
  #2
Here for the gear
 

Shutdown the iPadPro
Change Settings -> Face ID & Passcode -> USB Accessories from off to on
Change Settings -> Face ID & Passcode -> Require Passcode from Immediately to 4 hours

is either a workaround or if just the shutdown should be needed, the solution. I've got no time to test it and I had no time to use the USB audio device.
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