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