[bug #64405] Keystrokes repeating in grub menu

[Travis]

Follow-up Comment #1, bug #64405 (project grub):

I have have the same issue. Grub version: 2.06-3~deb10u2.  Motherboard: 
Micro-Star International Co., Ltd B550-A PRO (MS-7C56). 

A few interesting things:
1) the same issue happens in BIOS mode programs such as FreeDOS
2) (for me at least) the grub usb code is not causing the repeated strokes,
grub is using the BIOS 16h (`grub-core/term/i386/pc/console.c:
grub_console_getkey`). I tried changing the typematic setting using to various
settings (https://stanislavs.org/helppc/int_16-3.html) and it had no effect
seemingly. 
3) A ps/2 keyboard does not have the same issue
4) it seems to be an issue with the way the motherboard converts usb to legacy
bios keyboard commands? i dont know why grub isn't detecting usb 


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