LightBurn-Linux64-v0.9.09.run on Ubuntu
-same with .07 (the first I tested)
If you start LightBurn before connecting serial device /dev/ttyUSB* , then it will not show in the device list unless app is restarted while the device is present.
If you dis/reconnected (or reset the GRBL) , and it enumerates as /dev/ttyUSB1 istead of “0” , you will still see ttyUSB0 in the device list, but not ttyUSB1
Also: the splashscreen is just translucent, not showing anyting.