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authorRobin Hallabro-Kokko <44033026+hallabro@users.noreply.github.com>2019-02-06 11:57:19 +0000
committerDrashna Jaelre <drashna@live.com>2019-02-06 14:56:40 -0800
commit4397b17ca0893c3c80306a9d460a7c9f729cef91 (patch)
tree320ee8458a1706ea6ef9454e501faab2e902b82d /docs
parenta3104a71105e7743c778c47617dce0468bf8dc1f (diff)
faq_build.md: Add section about serial devices on Linux
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diff --git a/docs/faq_build.md b/docs/faq_build.md
index 14c61a1e99..d920d27e2a 100644
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@@ -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.