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
