[BUG] grub2 menu : freeze while initial drawing

[Vincent Pelletier <subdino2004@yahoo.fr>]

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Hi.
I've noticed that problem some days ago, but as I still can't find the
cause I report it. I'm running it on an x86, freezes in bochs, qemu and
on a real computer.

The menu border is drawn (btw : the top border isn't drawn, the bottom
one is drawn below screen, and the right one has 2 empty columns on its
right. I'm not reporting it as a bug since Marco Gerards told me there
may already be a patch for that), the top message too (GRUB version...)
and then it freezes.
Once border drawing disabled, the second message was drawn (Press enter
to boot the selected OS...) and the cursor was still visible. I saw it
stop blinking (tested in bochs only).

I think it should be a timer-related problem, maybe only on x86 - I
don't have any other architecture family here.

Vincent Pelletier

PS: my previous patch had a signature problem because I sent it with the
wrong address. I can send it again if there is any problem about that.
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