⚠ Only use this driver if your kernel is 5.5 or earlier. ⚠
The ch341 driver's line-speed handling has been fixed since 5.5 (see here), so it should be used instead.
The ch341 driver is shipped in most Linux distributions so you shouldn't need to install anything.

Install required packages

sudo apt install dkms

Build and install module

sudo dkms build .
sudo dkms install ch340/1.0.0

Blacklist the "wrong" driver. Open blacklist.conf (may not exist).

sudo nano /etc/modprobe.d/dkms.conf

Add the following line:

blacklist ch341

• Initial release