Linux-kernel mailing list archive 2000-29,: RE: IBM Netvista problem / help

# RE: IBM Netvista problem / help

Dunlap, Randy (randy.dunlap@intel.com)
Thu, 20 Jul 2000 15:21:07 -0700

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> > I've got one of these things, model 6645, around the office
> and I was wondering
> > if anyone has any ideas how to get it loaded. I tried
> booting off my RedHat
> > 6.2 cdrom but it hangs right when it's attempting to load
> and execute the
> > kernel. The machine is strange in that it doesn't have a
> normal PS/2 or AT
> > keyboard connector but instead relies on a USB keyboard.
> The keyboard works
> > fine at the lilo prompt so I was wondering if the hanging
> might be caused by
> > the Linux keyboard driver searching for a keyboard? Any ideas?
>
> I don't know anything about this particular machine, but I
> used to be a BIOS
> programmer. Your BIOS should have a setting to enable "legacy USB
> keyboard/mouse support". Basically, this makes your USB
> keyboard look like a
> PS/2 keyboard for "legacy" OS's (OS's that don't have USB
> keyboard drivers). As
> soon as the OS loads the USB drivers, the BIOS disables its
> USB support, and the OS takes over.
>
> If the OS is loading USB support but not USB keyboard
> support, that would
> explain your problem. Try building a kernel with absolutely
> no USB support.

I don't think that booting from RH 6.2 CD-ROM will enable
USB support (?), but otherwise this is correct.

The OS should either be built with USB keyboard support so
that when the USB host controller driver disables legacy
emulation you still have a working keyboard, or the OS
should be built with _NO_ USB support, so that the BIOS
will continue providing legacy emulation support for your
keyboard & mouse.

~Randy

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