After attempting to start Jack, the following shows up in the logs. (Also, after this error the Scarlett disappears from the list of sound/audio devices in the Gnome Settings app.)
The error messages can be seen in the screenshot above, but I'll include them below (so they'll be part of the forum text search/index):
Code: Select all
Sat Nov 21 11:20:09 2020: ERROR: JackPosixProcessSync::LockedTimedWait error usec = 5000000 err = Connection timed out
Sat Nov 21 11:20:09 2020: ERROR: Driver is not running
Sat Nov 21 11:20:09 2020: ERROR: Cannot open client name = dbusapi
Sat Nov 21 11:20:09 2020: ERROR: failed to create dbusapi jack client
Sat Nov 21 11:20:09 2020: ERROR: Unknown request 4294967295
Sat Nov 21 11:20:09 2020: ERROR: CheckSize error size = 0 Size() = 12
Sat Nov 21 11:20:09 2020: ERROR: CheckRead error
Sat Nov 21 11:20:13 2020: ERROR: ALSA: prepare error for playback on "hw:USB,0" (Broken pipe)
Sat Nov 21 11:20:13 2020: ERROR: JackAudioDriver::ProcessSync: read error, stopping...
Sat Nov 21 11:20:15 2020: ERROR: control open "hw:USB" (No such device)
Sat Nov 21 11:20:15 2020: ERROR: control open "hw:USB" (No such device)