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More information regarding the error I'm seeing with my setup; Upon boot and wake from sleep (Windows 10) my keyboard is being detected as 'Unknown USB Device (Device Descriptor Request Failed)' with error code 43 and the only way to have it be detected properly is to unplug and re-attach the keyboard when the computer is fully booted. It is then detected as 'HID-compliant game controller'.
Setup is an Asus ROG laptop with a USB hub attached with the keyboard attached through the hub (work setup). I realize there are other ways I can test the configuration (and they might work), the point is every other keyboard works just fine with the same setup and this one doesn't.
Hmm, have you been able to flash both sides of the keyboard yet? Try connecting the halves directly to the laptop to do this first (there have been some firmware compatibility updates from what is shipped from the factory).
Also, is the USB Hub powered?
Just flashed both halves and switched the primary connection from the right to the left half (probably not relevant). After reboot the keyboard is working properly. This seems to have resolved the issue (haven't tried BIOS detection, but I'll cross that bridge when I come to it).
Looks like it probably was an issue with the factory firmware. Thanks for the heads up.
Not that it's relevant now, but the hub is powered. It's a USB 3.0 displaylink docking station for additional monitor, network, and usb support.
For those reading, please flash both sides the first time. When you get the keyboard. You'll save yourself a bunch of grief (don't even have to change the layout).
Why exactly do I need to do this? I just flashed the right half and everything seems to be working the way it is supposed to. I'm not sure what would change if I just re flas the same layout onto the second half as well.
Every time you flash, the firmware/software is also updated. Not just the layout. This means any bugs fixed in the interconnect (which is a pretty sophisticated protocol) would also get resolved. The layout on the chained keyboard does not matter, unless you plan on chaining in reverse at some point.