Ubuntu is not officially supported nor are any device drivers and or firmware associated.
On the Windows PC. -
Open the Universal Control Application, go to Settings>Update Firmware...
If you get a pop up telling you the firmware is up to date, click Update Anyway.
If the problem persists, we can try the following:
* Power off the Studio 192
* Whilst holding down the 'Talk' and 'Mono' buttons power on the Studio 192, or '48v' and the 'Cue' buttons on the 192 Mobile (this will boot the Studio 192 into Load mode)
* Open the Universal Control application and try to force the firmware update again.
Should this still not resolve the firmware issue try connecting your Studio 192 with a USB 2.0 cable.
If again, the above steps fail to get the Studio 192 to function normally, I suggest trying all mentioned troubleshooting steps on a different computer.
If you still cannot get things to work, contact PreSonus Support.