在ubuntu22.04下使用ch341串口时无法连接，打印log如下：
[ 6402.738238] ch341: V1.8 On 2024.08
[ 6421.048831] usb 1-9.4: USB disconnect, device number 32
[ 6424.656008] usb 1-9.4: new full-speed USB device number 33 using xhci_hcd
[ 6424.762528] usb 1-9.4: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.54
[ 6424.762540] usb 1-9.4: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[ 6424.762542] usb 1-9.4: Product: USB2.0-Serial
[ 6424.771296] usb_ch341 1-9.4:1.0: ttyCH341USB0: ch341 USB device
[ 6425.323950] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input38
[ 6425.325892] usb 1-9.4: usbfs: interface 0 claimed by usb_ch341 while 'brltty' sets config #1
[ 6425.326609] usb_ch341 1-9.4:1.0: ch341 usb device disconnect.
[ 6441.529036] usb 1-9.4: USB disconnect, device number 33
[ 6444.525675] usb 1-9.4: new full-speed USB device number 34 using xhci_hcd
[ 6444.631594] usb 1-9.4: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.54
[ 6444.631602] usb 1-9.4: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[ 6444.631605] usb 1-9.4: Product: USB2.0-Serial
[ 6444.639843] usb_ch341 1-9.4:1.0: ttyCH341USB0: ch341 USB device
[ 6445.189280] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input39
[ 6445.191369] usb 1-9.4: usbfs: interface 0 claimed by usb_ch341 while 'brltty' sets config #1
[ 6445.192045] usb_ch341 1-9.4:1.0: ch341 usb device disconnect.
原因是ch341驱动与brltty冲突，brltty为盲人提供的系统服务：https://github.com/brltty/brltty
解决办法：apt remove --purge brltty