Linux 5.18 Preparing Another New Driver For Quirky Keyboards

Written by Michael Larabel in Hardware on 8 February 2022 at 03:00 AM EST. 2 Comments
The "hid-sigmamicro" driver is queued up in HID-next ahead of Linux 5.18 for dealing with keyboards exhibiting problematic behavior that use SiGma Micro keyboard control ICs.

The new hid-sigmamicro driver is yet another Linux HID/input driver being introduced to mitigate problematic behavior of hardware. While most functionality of the keyboards with the SiGma Micro keyboard control ICs work fine under Linux, it turns out some of their ICs found in some keyboards will end up mapping all modifier keys as Shift (left) input.

So this new hid-sigmamicro driver corrects that so the modifier keys will behave correctly by fixing up their report descriptor. This driver so far has been tested with Landslides KR-700 and Rapoo V500 keyboards as known to exhibit this issue.

Rapoo V500

This 130 lines of code driver is now in HID for-next ahead of the Linux 5.18 merge window for helping out anyone impacted by this SiGma Micro keyboard IC behavior.
Related News
About The Author
Michael Larabel

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

Popular News This Week