ch34x uart for ubuntu22
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Due to component conflicts, the ch340 serial device cannot be used normally on ubuntu22 systems.
305.764435] usb 1-1.3: new full-speed USB device number 7 using ehci-platform [ 305.979075] usb 1-1.3: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.64 [ 305.979080] usb 1-1.3: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [ 305.979083] usb 1-1.3: Product: USB Serial [ 305.979693] ch341 1-1.3:1.0: ch341-uart converter detected [ 305.980778] usb 1-1.3: ch341-uart converter now attached to ttyUSB0 [ 306.554038] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input8 [ 306.557920] usb 1-1.3: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1 [ 306.558913] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0 [ 306.558971] ch341 1-1.3:1.0: device disconnected
user need to do:
sudo apt remove brltty
plugout uart module and plugin again.