Question

[88756.968079] usb 1-1.1: new full-speed USB device number 26 using xhci_hcd
[88757.069717] usb 1-1.1: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.64
[88757.069735] usb 1-1.1: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[88757.069743] usb 1-1.1: Product: USB Serial
[88757.080827] ch341 1-1.1:1.0: ch341-uart converter detected
[88757.081963] usb 1-1.1: ch341-uart converter now attached to ttyUSB0
[88761.887170] usb 1-1.1: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1
[88761.888421] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0
[88761.888533] ch341 1-1.1:1.0: device disconnected
[88775.946038] usb 1-1.1: USB disconnect, device number 26

Answer

for f in /usr/lib/udev/rules.d/*brltty*.rules; do
    sudo ln -s /dev/null "/etc/udev/rules.d/$(basename "$f")"
done
sudo udevadm control --reload-rules
sudo systemctl mask brltty.path