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

[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

[foxhoundsk]

I just run :

sudo apt remove brltty

So the TLDR is, if you are not a blind and you have this device, simply remove the package.

[mmiller7]

I just run :

sudo apt remove brltty

THANK YOU!

I've spent half an hour trying to figure out why many of my USB-Serial devices no longer work on Mint anymore...no idea where this package came from or why its installed by default. UGH!

And not sure why some other package thought it would be good to randomly take over serial controlled peripherals...

[khisanthax]

Wow, three years later and this saved me a week of headache. I use klipper on linux and I couldn't figure out why some of my usb printers would be recognized and some wouldn't. I finally did sudo dmesg -w which led me to this error and I removed the package. Thanks sooo much!!