faq_build.md: Add section about serial devices on Linux

This commit is contained in:
Robin Hallabro-Kokko 2019-02-06 11:57:19 +00:00 committed by Drashna Jaelre
parent a3104a7110
commit 4397b17ca0

View file

@ -37,6 +37,10 @@ SUBSYSTEMS=="usb", ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="2ff0", MODE:="066
SUBSYSTEMS=="usb", ATTRS{idVendor}=="feed", MODE:="0666"
```
### Serial device is not detected in bootloader mode on Linux
Make sure your kernel has appropriate support for your device. If your device uses USB ACM, such as
Pro Micro (Atmega32u4), make sure to include `CONFIG_USB_ACM=y`. Other devices may require `USB_SERIAL` and any of its sub options.
## Unknown Device for DFU Bootloader
If you're using Windows to flash your keyboard, and you are running into issues, check the Device Manager. If you see an "Unknown Device" when the keyboard is in "bootloader mode", then you may have a driver issue.