Broken A20 gate handling

[Ludovic Drolez]

Hi !

Recently I tried to use grub(2) with a compaq evo D510. These boxes do not seem 
to have a keyboard controller, so grub freeze in gatea20().

Most free bootloaders fail, but one is okay: syslinux/isolinux.

I've taken a look at syslinux's code, and indeed A20 activation is done much 
more carefully than in grub, and more tricks are used.

I think it's really important to fix grub's code (by stealing code from isolinux 
?), because more and more PCs without a good old keyboard controller will hit 
the market.

Are there any plans to improve gatea20() ? (Moreover, grub2's code for gatea20 
is even worse than grub-legacy)

Regards,

--
Ludovic DROLEZ