This issue appears to be in the kernel driver itself. I guess it is some type of regression.
There was no difference using the mainline kernel or the default kernel inside another host with Alpine Linux distro (Linux alpine 5.10.16-0-lts #1-Alpine SMP Wed, 17 Feb 2021 08:17:06 UTC i586 Linux). The device still receives, but does not send. Please report this bug upstream. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1919051 Title: ch341 USB-Serial converter only receives, does not send To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1919051/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
