Bug#1006774: grub-pc: seems related to keys autorepeating

[Luc Maisonobe]

Hi all,

Here are some more informations about this bug.

I can confirm it happens on USB keyboard and it does not
happen on PS/2 keyboard.

I purchased an old used PS/2 keyboard on ebay to check.
With this keyboard plugged on the PS/2 socket of
the motherboard, everything workd fine. At boot time,
I can press the arrow keys to select menu entries in
Grub at will. When I have highlighted the entry I want,
pressing enter runs this entry, as expected.

I tried also some mixed settings, as both the Logitech
MX Keys with a wireless USB dongle and the old PS/2
keyboard were plugged when booting. In this setting,
if I use the PS/2 keyboard arrow keys to change selection,
it works. Then, I switch to the USB keybord and try to
also use the arrow keys. Freeze occurs immediately, at
the first press of a key from the USB keyboard. Once
grub is frozen, if I attempt to use the PS/2 keyboard
again, nothing happens, grub remains frozen and I have to
use the power switch to shut down the computer.

Note that the problem does not occur on a notebook
with an integrated keyboard, even if I use the wireless
USB keyboard instead of the notebook keyboard.

So the only workaround I found for using the grub menu
on a desktop PC was to purchase an old PS/2 keyboard,
and not touch at all the USB keyboard while grub is
active.

best regards,
Luc