[Bug 1976293] Re: 21.10 → 22.04: Installs *brltty* breaking FTDI USB serial devices

[Sebastien Bacher]

Jeremy, that's not a duplicate. The other bug is about brltty claiming
the device, the report here is about the package being installed on
upgrade which doesn't sound like it should

** This bug is no longer a duplicate of bug 1958224
   brltty claiming cp210x devices on 22.04

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https://bugs.launchpad.net/bugs/1976293

Title:
  21.10 → 22.04: Installs *brltty* breaking FTDI USB serial  devices

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  On a default Ubuntu desktop installation (with GNOME) doing `do-
  release-upgrade` from 21.10 to 22.04 installed *brltty* breaking FTDI
  USB serial devices.

  ```
  [ 2435.150025] usb 1-2: new full-speed USB device number 6 using xhci_hcd
  [ 2435.305646] usb 1-2: New USB device found, idVendor=0403, idProduct=6001, bcdDevice= 6.00
  [ 2435.305660] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  [ 2435.305666] usb 1-2: Product: USB Serial Converter
  [ 2435.305671] usb 1-2: Manufacturer: FTDI
  [ 2435.305675] usb 1-2: SerialNumber: FTFCV4W7
  [ 2435.311747] ftdi_sio 1-2:1.0: FTDI USB Serial Device converter detected
  [ 2435.311824] usb 1-2: Detected FT232RL
  [ 2435.313260] usb 1-2: FTDI USB Serial Device converter now attached to ttyUSB0

  [ 2437.583625] usb 1-2: usbfs: interface 0 claimed by ftdi_sio while 'brltty' sets config #1
  [ 2437.585095] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
  [ 2437.585168] ftdi_sio 1-2:1.0: device disconnected 
  ```

  The brltty problem is tracked in the Debian BTS as #667616 [1], and
  the solution is to remove the package with `sudo apt purge brltty`.

  The question is though, why `do-release-upgrade` installed it in the
  first place. I do not remember the problem from earlier release
  upgrades.

  
  [1]: https://bugs.debian.org/667616

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