Hello,
I haven’t tried under Ubuntu but did try under Windows Environment. just for testing I’ve tried change ATI!USBCOMP=1,1,50D or ATI!USBCOMP=1,1,100D and believe “100D” as for MBIM and “50D” as for QMI. Have you tried change again ATI!USBCOMP=1,1,50D ? Believe this parameter for QMI.