usbfs: interface 0 claimed by ch34x while 'brltty' sets config #1

[beautifulzzzz]

make 
sudo make load

then reboot, still can't find ttyUSB.

sudo dmesg | grep ch34x
still show the disconnect msg:

  284.973396] ch34x 3-4.2:1.0: ch34x converter detected
[  284.973894] usb 3-4.2: ch34x converter now attached to ttyUSB0
[  285.019333] usb 3-4.2: usbfs: interface 0 claimed by ch34x while 'brltty' sets config #1
[  285.019883] ch34x ttyUSB0: ch34x converter now disconnected from ttyUSB0
[  285.019895] ch34x 3-4.2:1.0: device disconnected

then, I find : https://unix.stackexchange.com/questions/670636/unable-to-use-usb-dongle-based-on-usb-serial-converter-chip

use:

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

then OK (no need to reboot)

[beautifulzzzz]

my pc info:

➜  / screenfetch 
                   -`                 
                  .o+`                 btfz@lt-pc
                 `ooo/                 OS: Arch Linux 
                `+oooo:                Kernel: x86_64 Linux 5.14.14-arch1-1
               `+oooooo:               Uptime: 16m
               -+oooooo+:              Packages: 1469
             `/:-:++oooo+:             Shell: zsh 5.8
            `/++++/+++++++:            Resolution: 3200x1080
           `/++++++++++++++:           DE: Xfce4
          `/+++ooooooooooooo/`         WM: Xfwm4
         ./ooosssso++osssssso+`        WM Theme: Microdeck3
        .oossssso-````/ossssss+`       GTK Theme: Arc-Dark [GTK2]
       -osssssso.      :ssssssso.      Icon Theme: Numix-Circle
      :osssssss/        osssso+++.     Font: Sans 10
     /ossssssss/        +ssssooo/-     Disk: 96G / 215G (47%)
   `/ossssso+/:-        -:/+osssso+-   CPU: Intel Xeon E3-1230 V2 @ 8x 3.7GHz [39.0°C]
  `+sso+:-`                 `.-/+oso:  GPU: AMD/ATI Juniper PRO [Radeon HD 6750]
 `++:.                           `-/+/ RAM: 1234MiB / 7862MiB
 .`                                 `/
➜  / 

[lelibreauquotidien]

Thanks a lot, this fix worked for me !

[juliagoda]

Thank you for your tutorial, I have pinned this thread for others with this problem

[3urobeat]

Thank you so much!

[DmitryOb]

or you can use solution without disable all service, just disable rule of matching
brltty has a rule for idVendor=1a86, idProduct=7523, which is the same as the CH340 serial converter.
/usr/lib/udev/rules.d/85-brltty.rules
# ENV{PRODUCT}=="1a86/7523/*", ENV{BRLTTY_BRAILLE_DRIVER}="bm", GOTO="brltty_usb_run"
comment upper row then reboot os

[beautifulzzzz]

every reboot make load

sudo cp -f ./ch34x.ko /lib/modules/$(shell uname -r)/kernel/drivers/usb/serial

sudo echo "ch34x" > /etc/modules-load.d/ch34x.conf
sudo chmod +x /etc/modules-load.d/ch34x.conf

[d4lt]

thanks man it helped a lot

[affablemattress]

or you can use solution without disable all service, just disable rule of matching brltty has a rule for idVendor=1a86, idProduct=7523, which is the same as the CH340 serial converter. /usr/lib/udev/rules.d/85-brltty.rules # ENV{PRODUCT}=="1a86/7523/*", ENV{BRLTTY_BRAILLE_DRIVER}="bm", GOTO="brltty_usb_run" comment upper row then reboot os

non-invasive & immidiate fix, thanks dude

[jiaxuan-guo]

or you can use solution without disable all service, just disable rule of matching
brltty has a rule for idVendor=1a86, idProduct=7523, which is the same as the CH340 serial converter.
/usr/lib/udev/rules.d/85-brltty.rules
# ENV{PRODUCT}=="1a86/7523/*", ENV{BRLTTY_BRAILLE_DRIVER}="bm", GOTO="brltty_usb_run"
comment upper row then reboot os

Thanks a lot!! It works for me!!

[breaker-mm]

I just run :

sudo apt remove brltty

[kasunvj]

I just run :

sudo apt remove brltty

This works