ch340 linux 驱动问题
tongxinmao.com 发表于: 2023-03-22 15:44:20
1#

按官方说明已经成功加载KO模块 lsmod 正常。插入设备LSUSB也有的，但就是没出现/dev/ttyCH340  这个节点文件


环境是ubuntu kylin 22

热门产品 : CH347:高速USB转接芯片
TECH53 发表于: 2023-03-23 11:32:49
2#

您好，您可重新插拔设备后查看日志，设备是否有正常生成节点以及节点名称，另设备ID您可截图发出，我们进行查看。

tongxinmao.com 发表于: 2023-03-24 07:23:18
3#

已解决：

BRLTTY is a background process (daemon) providing access to the Linux/Unix console (when in text mode) for a blind person using a refreshable braille display.

brltty是一个后台进程（守护进程），为盲人提供对Linux/Unix控制台的访问（当处于文本模式时），使用可刷新盲文显示。


直接删除 brltty 后有ttyUSB0了






Bus 002 Device 009: ID 1a86:7523 QinHeng Electronics CH340 serial converter

~/CH341SER_LINUX/driver$ lsmod | grep ch34

ch341? ? ? ? ? ? ? ? ? 24576? 0

usbserial? ? ? ? ? ? ? 57344? 1 ch341


47828.570087] usb 2-2.2: new full-speed USB device number 9 using uhci_hcd

[47828.880291] usb 2-2.2: New USB device found, idVendor=1a86, idProduct=7523, bcdDevice= 2.64

[47828.880348] usb 2-2.2: New USB device strings: Mfr=0, Product=2, SerialNumber=0

[47828.880350] usb 2-2.2: Product: USB Serial

[47828.885685] ch341 2-2.2:1.0: ch341-uart converter detected

[47828.899624] usb 2-2.2: ch341-uart converter now attached to ttyUSB0

[47829.512414] input: BRLTTY 6.4 Linux Screen Driver Keyboard as /devices/virtual/input/input9

[47829.522626] usb 2-2.2: usbfs: interface 0 claimed by ch341 while 'brltty' sets config #1

[47829.528528] ch341-uart ttyUSB0: ch341-uart converter now disconnected from ttyUSB0

[47829.528769] ch341 2-2.2:1.0: device disconnected

[47836.258993] usb 2-2.2: usbfs: USBDEVFS_CONTROL failed cmd brltty rqt 128 rq 6 len 255 ret -110


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