Ubuntu 20.04 - can't upload Arduino's sketch

this happens to the latest ubuntu with the latest kernel and several versions of arduino-ide ( from snap, from apt install, even with the latest version installed from arduino's website ) tried several board version's tried modded esptool tried not-modded esptool tried several (not charge only) cables tries several esp32 boards and esp32 vendors ( wemos, nodemcu, etc. )

I believe that there might be a problem with the serial driver? All boards are working great on windows with all versions of arduino-ide tested on Ubuntu 20.04, and same cables. I ruled out any possible problem in regards to : software (ide), cables, boards.

will dig more into this.

LE: Found the issue! Looks like there is a bug in the kernel driver for ch340/ch341 I had one old kernel installed ( 5.9.x ) and with this one works. That took me to some search over the internet :) so here it is

      Bug ID: 214131
     Summary: ch341 communication problem
     Product: Drivers
     Version: 2.5

Kernel Version: 5.14-rc5 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: USB

It looks to me that starting kernel 5.10.x till 5.14-rc5 the bug is present.

Happy coding guys

Workaround for ESP boards:

Settings prior to uploading the sketch:

• Boardtype: Generic ESP8266
• Flash size: 4MB
• Reset method: "dtr (aka nodemcu)" (default)

Then:

1. Change reset method to: "no dtr (aka ck)" (Tools -> Reset Method)
2. Then press Flash button
3. Press Reset shortly
4. Then release Flash
5. Upload sketch in the Arduino IDE

Source: https://forum.manjaro.org/t/manjaro-21-1-0-und-esp8266-sketch-upload-doesnt-work-anymore/79712/2

Note: Tested on ESP8266 (NodeMCU)

Update:

This issue has been fixed in the latest kernel version. Please update the kernel and test again.