Without other usb devices the keyboard works immediately. With them it takes 5 ish seconds for it to start responding. This is regardless of which device is discovered first (which I can manipulate), it seems to just wait for all of them. Is there a way to make it not do that?
Edit: This is specifically about linux boot. It otherwise works fine in bios / bootloader
Hint: try another USB port.
USB is like a network, and it could be a jungle of cables and ports and switches and bridges and whatnot. But the closer you get to the mainboard, the better are your chances to escape such a problem.
I had an issue where one keyboard (worked with another one) worked in bootloader, but not when entering the encryption password after that. I believe I solved that by moving keyboard earlier in the module list in mkinitcpio.conf. Maybe something similar would solve your issue?
I had a motherboard like this: the USB ports didn’t work until it booted into an OS. You had to connect a PS2 to make changes in the BIOS, and could only boot from IDE. It was super-annoying.
Are you using the usb ports on the motherboard itself? Because you need to with a lot of MBs depending on when they initialize other USB
Check if you find anything about this in the kernel log (dmesg).
