On Fri, Sep 14, 2012 at 10:22 AM, Paul Hartman <paul.hartman+gen...@gmail.com> wrote: > On Fri, Sep 14, 2012 at 6:21 AM, Michael Mol <mike...@gmail.com> wrote: >> On Fri, Sep 14, 2012 at 12:24 AM, Walter Dnes <waltd...@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. >> >> Either way, there's no harm in enabling both. > > On my laptop (circa 2004) I have to load the USB modules (?HCI) in a > specific order otherwise things don't work properly. I don't remember > what that order is, exactly, as I'm not using it at the moment, but > thought I'd mention it FWIW...
That may be true. I always kept them as built-ins, as having a USB keyboard be unavailable during a failed boot sequence would be a PITA. > -- :wq
