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Asked: 2024-09-27T00:37:29+05:30 In:

I am experiencing issues with the CH341 driver on Ubuntu 20.04. Despite my attempts to get it functioning properly, I am encountering difficulties. Does anyone have insights or solutions for resolving this problem?

I’m having some serious trouble with the CH341 driver on my Ubuntu 20.04 setup, and it’s driving me a bit nuts. I recently bought a CH341 USB to serial interface for a project I’m working on, and I thought it would be super easy to just plug it in and get going. Unfortunately, that hasn’t been the case!

So, here’s the situation: I plugged in the device, and it gets recognized, but when I check the device manager, it seems like the driver isn’t loading correctly. I’ve tried a few things, like running `dmesg` to check for any error messages. I see some lines that mention the CH341 driver, but it looks like it’s not functioning as it should. I’m honestly not that great with Linux, so piecing together the errors is pretty overwhelming.

I also found a couple of tutorials online suggesting ways to manually install the driver. I went through the steps, installing the required packages and even trying to compile the driver from source. But no luck there either. I’m not sure if it’s a permissions issue, a conflict with existing drivers, or if I’m just missing a simple step that someone more experienced would know to check. It just feels like I’m in a loop of frustration!

I’ve looked into using `lsusb` to see if the device is detected, and it shows up, but when I try to open up a terminal and communicate with it using programs like `screen` or `minicom`, it just fails to connect. It’s super frustrating because I really need to get this working for my project, which is on a bit of a deadline.

Has anyone else dealt with this kind of issue? I’d appreciate any tips or insights on things I might have overlooked. If you’ve got any solutions or workarounds that could help, I’m all ears! Thanks in advance for any help; I really don’t want this driver to be the thing that stalls my whole project.

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    1. CH341 Driver Issues on Ubuntu 20.04


      CH341 Driver Troubleshooting

      Sounds like you’re having a tough time with that CH341 USB to serial interface! Here are a few things you can try to hopefully get it working:

      1. Check Kernel Logs

      Since you mentioned running dmesg, make sure to look for any lines that mention “CH341” or “error”. Sometimes, it can give you clues about what’s wrong.

      2. Permissions

      It might be a permissions issue. You can try running your terminal as a superuser or adding your user to the dialout group, which is often needed for serial devices:

      sudo usermod -a -G dialout $USER

      After this, log out and back in for the changes to take effect.

      3. Check for Existing Drivers

      Sometimes conflicts happen with existing drivers. You might want to blacklist any conflicting drivers. Check your current driver with this command:

      lsmod | grep ch341

      If it’s listed, you might need to uninstall or blacklist it.

      4. Manual Driver Loading

      If the driver is not loading automatically, try to load it manually:

      sudo modprobe ch341

      Run dmesg again after this to check if there are any new messages.

      5. Application Configuration

      When using screen or minicom, make sure you are using the correct device path (like /dev/ttyUSB0). Check what devices are connected with:

      ls /dev/tty*

      6. Consider an Alternative

      If all else fails, sometimes using a different USB port or trying another computer can help rule out hardware issues.

      7. Community Help

      Don’t hesitate to ask around on forums or communities like Stack Overflow, Ubuntu Forums, or even subreddits dedicated to Linux. People might have faced the same issue and could offer some unique solutions.

      Hopefully, one of these tips helps you clear out the frustration and get your project back on track!


    2. “`html

      It sounds like you’re experiencing a common issue with the CH341 USB to serial interface on Linux systems. First, ensure that the CH341 driver is loaded correctly. You can check this by running lsmod | grep ch341 in the terminal. If you don’t see the driver listed, you may need to load it manually with sudo modprobe ch341. Additionally, verify that the device is assigned the correct permissions; you can do this by checking /dev/ttyUSB* for your device. If permissions seem to be an issue, you might want to set your user to the dialout group using sudo usermod -aG dialout $USER, and then log out and back in to apply the changes. Also, ensure no other services or processes are trying to access the serial port while you attempt to connect.

      If you’re seeing messages in dmesg indicating the driver is not functioning, look out for errors or warnings about USB negotiation or power issues. Sometimes, using a powered USB hub can help if the device isn’t getting enough power from your computer’s USB ports. Since you’ve already attempted to compile the driver from source, it might be worthwhile to ensure you have the necessary kernel headers installed; these can be installed using sudo apt-get install linux-headers-$(uname -r). As for the communication tools, both screen and minicom require the correct serial port settings (baud rate, stop bits, parity, etc.), so double-check that you’re using the right configuration. If all else fails, you could explore using putty as an alternative tool for communication, which sometimes handles connections more gracefully than others.

      “`

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