I just upgraded to Focal and yes, the issue just come back. ###### from dmesg ###### [ 5.722325] dwc2 fe980000.usb: fe980000.usb supply vusb_d not found, using dummy regulator [ 5.722385] dwc2 fe980000.usb: fe980000.usb supply vusb_a not found, using dummy regulator [ 5.722541] dwc2 fe980000.usb: Configuration mismatch. dr_mode forced to host
So unlikely the compilation flag is applied to the current Focal kernel. ###### from dpkg -l ###### ii linux-raspi2 5.4.0.1011.11 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861070 Title: Raspberry Pi 4B: USB OTG is not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1861070/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs