On Fri, Sep 14, 2012 at 12:24 AM, Walter Dnes <[email protected]> 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. Either way, there's no harm in enabling both. -- :wq
