Re: [gentoo-user] new machine : mouse trouble : solved by accident

[Volker Armin Hemmann]

Am Freitag, 14. September 2012, 07:21:17 schrieb Michael Mol:
> On Fri, Sep 14, 2012 at 12:24 AM, Walter Dnes <waltdnes@××××××××.org> wrote:
> > On Thu, Sep 13, 2012 at 10:06:01PM -0400, Philip Webb wrote
> >
> > > The effect is quite bizarre & it was the gods who saved me :
> > > if I hadn't happened to plug the mouse into the neighbouring port,
> > > I could have spent days struggling to find out what was wrong
> > > & even taken the mobo back to the store as defective.
> > >
> > > Both Mageia -- installed from USB stick in a partition on the
> > > HDD -- & System Rescue show  /dev/input/mouse0  after booting ;
> > > in the case of SR it does it before I enter the GUI via 'wizard'.
> > > They have no problem with the 2.0/1.1 port, but the Gentoo system as
> > > I've installed it don't show  /dev/input/mouse0 from that port, but
> > > only if I plug the mouse into the 3.0/2.0 port.  Someone suggested
> > > it is caused by a Kernel .config setting, which if enabled seems to
> > > force the system to look in the 3.0 port.  Why it should do that
> > > doesn't make much sense : such upgrades are usually permissive,
> > > not restrictive.  BTW there's no difference between 3.4.9 & 3.5.3 .
> > >
> >   Is the cpu AMD?  Intel machines require UHCI (USB 1.1) and AMD
> >
> > machines require OHCI (USB 1.0) for lowspeed USB devices like keyboards
> > and mice.  There's a root hub translator selection in .config that's
> > *SUPPOSED* to work with keyboards+mice, using only the EHCI kernel
> > driver, but I never could get it to work.
>
> UHCI vs OHCI has nothing to do with the CPU, but with the chipset on the
> system. I haven't seen an OHCI-supporting chip in over a decade, either,
> and most of my systems have been AMD.

and now you are talking crap.

All amd southbridges need the ohci controller driver.

#163933