Mathieu Trudel-Lapierre <[email protected]> writes:

 | If you add the necessary lines to blacklist the USB IDs in 77-mm-usb-
 | device-blacklist.rules, can you then have the RS232-to-USB devices work
 | properly?

Yes, thanks, that works in my case after adding the following

to /lib/udev/rules.d/77-mm-usb-device-blacklist.rules :

# Prolific
ATTRS{idVendor}=="067b", ATTRS{idProduct}=="2303", ENV{ID_MM_DEVICE_IGNORE}="1"

How should I protect this against update replacements of that file?

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https://bugs.launchpad.net/bugs/700316

Title:
  usbserial stopped working during a recent upgrade, no serial line via
  usb anymore

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