[syslinux] USB keyboard problem

Ricardo Santos rs at isctem.ac.mz
Thu Mar 16 23:02:45 PST 2006

The strange thing is that I have Legacy USB enabled on the BIOS.

And I have downloaded an pxelinux.0 version from pxes.sourceforge.net
and that version works.

The last one (that I downloaded from syslinux site) doesn't work.

Must I make any thing in pxelinux to work?

The machines are Intel dot stations, kind of thin clients.


On Thu, 2006-03-16 at 13:38 -0600, Nazo wrote:
> On 3/16/06, Ricardo Santos <rs at isctem.ac.mz> wrote:
> > Sorry. I made a mistake with the version.
> >
> > But there is something strange. Does menu.c32 work with USB keyboards?
> >
> > Ricardo
> >
> > On Thu, 2006-03-16 at 09:05 -0800, H. Peter Anvin wrote:
> > > Ricardo Santos wrote:
> > > > When using the latest pxelinux my usb keyboard doesn't work (within the
> > > > menu).
> > > >
> > > > If I use the pxelinux build 074 the keyboard works (without menu), but
> > > > this version doesn't recognize the default menu.c32 directive.
> > >
> > > There is no such thing as "pxelinux build 074".
> > >
> > >       -hpa
> >
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> >
> In theory, menu.c32 doesn't know USB from PS/2 or even the old
> standard (was it called just AT?  I don't recall.)  One would think
> that it shouldn't be possible for this particular issue to occur at
> all actually.  If you don't mind my hazarding a guess, I would suppose
> that it's resetting and assigning certain hardware components to allow
> for usage of the network and USB doesn't get properly assigned in this
> process.  One thing I'd recommend you check is to see if your BIOS has
> an option which says something to the effect of "USB Legacy Support"
> or it may just be two options "USB Mouse" and "USB Keyboard." 
> Enabling these should, in theory, allow things that don't actually use
> USB to access your keyboard and mouse (I say mouse because I think
> some have only "USB Mouse" which doubles to also do legacy keyboard as
> well as mouse, so if you have both, I'd turn them both on to be on the
> safe side.)  I've been using a USB keyboard hooked directly to USB
> instead of with a PS/2 adaptor for quite a while now, and I haven't
> had any troubles which may or may not be related to the fact that I've
> been using legacy input device support since even before I had a USB
> keyboard (I wanted to try to be relatively sure that when I got one it
> would cause a minimal fuss to switch over.)  Then again, I'll be
> honest, I don't use PXELinux since I'm in a home environment and
> having to run a server all the time would be troublesome.

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