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Neeum Zawan <m.n### [at] ieeeorg> wrote:
> I'm not understanding why.
> I've tried this on Linux on my office machine, and it worked just fine.
If I unplug and re-plug my PS/2 keyboard, it won't work, neither in Linux
nor in Windows. I have to reboot.
--
- Warp
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On 08/02/09 09:30, Warp wrote:
> Neeum Zawan<m.n### [at] ieeeorg> wrote:
>> I'm not understanding why.
>
>> I've tried this on Linux on my office machine, and it worked just fine.
>
> If I unplug and re-plug my PS/2 keyboard, it won't work, neither in Linux
> nor in Windows. I have to reboot.
Just tried it right now (30s unplugged). Plugged it back in. Works
fine. Could this be a kernel thing? Perhaps my kernel is more recent?
dmesg doesn't show anything...
OK. Weird. I just unplugged again and replugged it in within 2-3
seconds, and the keyboard didn't work. I unplugged it and waited over 45
seconds, and plugged it back in. It works now. No reboot, no reloading of X.
--
Kotter: "Have you ever considered becoming a vet?"
Epstein: "Uh...Uh no. My brother Sanchez was in the army. Didn't like it
a bit."
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Neeum Zawan wrote:
> So in other words, it's merely for manufacturer convenience?
Which leads to cheaper machines, yes. Especially laptops, where space around
the edge is limited. Plus, I'm not sure how docking/undocking would interact
with such.
> USB is not needed to get those multimedia keys. My keyboard is PS/2
> and it has them.
Correct.
> I suppose if I think really hard, I'll come up with a need for more
> than one keyboard...
Different keyboards with different sets of keys, like a music keyboard
perhaps. (Not what was meant, but you see what I'm saying - specialized key
layouts, etc).
And, of course, docked laptops.
> True, but that usage seems rare. I can't recall seeing a keyboard
> that had this - although I don't doubt their existence.
I had this built into a monitor once. Was weird. Never used it.
I'd surely use a USB thumbdrive port built into my keyboard.
--
Darren New, San Diego CA, USA (PST)
"We'd like you to back-port all the changes in 2.0
back to version 1.0."
"We've done that already. We call it 2.0."
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On 08/02/09 13:01, Darren New wrote:
> Which leads to cheaper machines, yes. Especially laptops, where space
> around the edge is limited. Plus, I'm not sure how docking/undocking
> would interact with such.
<snip>
> And, of course, docked laptops.
As I never owned a laptop, I can see why I never saw much of a need for
USB keyboards...
--
Kotter: "Have you ever considered becoming a vet?"
Epstein: "Uh...Uh no. My brother Sanchez was in the army. Didn't like it
a bit."
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Darren New <dne### [at] sanrrcom> wrote:
> Yes. PS/2 is the little DIN plug. Anyone still have one of the full-size
> DIN plugs they used before that?
Me!
Only via an adapter though; don't want to swap my good old Cherry keyboard with
anything else. At least not until I come across something that's really worth
it.
(BTW, strictly speaking, PS/2 was an 80286-based PC series by IBM, which
happened to introduce those "mini-DIN" plugs, hence the colloquial name.)
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Neeum Zawan <m.n### [at] ieeeorg> wrote:
> On 08/02/09 09:30, Warp wrote:
> > Neeum Zawan<m.n### [at] ieeeorg> wrote:
> >> I'm not understanding why.
> >
> >> I've tried this on Linux on my office machine, and it worked just fine.
> >
> > If I unplug and re-plug my PS/2 keyboard, it won't work, neither in Linux
> > nor in Windows. I have to reboot.
> Just tried it right now (30s unplugged). Plugged it back in. Works
> fine. Could this be a kernel thing? Perhaps my kernel is more recent?
> dmesg doesn't show anything...
> OK. Weird. I just unplugged again and replugged it in within 2-3
> seconds, and the keyboard didn't work. I unplugged it and waited over 45
> seconds, and plugged it back in. It works now. No reboot, no reloading of X.
According to wikipedia PS/2 is not designed to be hot-swappable, and
whether it will work after a hot-swap depends on the hardware and software.
It even warns that on older PCs hot-swapping a PS/2 device might even damage
the circuits.
--
- Warp
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Neeum Zawan <m.n### [at] ieeeorg> wrote:
> Just tried it right now (30s unplugged). Plugged it back in. Works
> fine. Could this be a kernel thing? Perhaps my kernel is more recent?
> dmesg doesn't show anything...
>
> OK. Weird. I just unplugged again and replugged it in within 2-3
> seconds, and the keyboard didn't work. I unplugged it and waited over 45
> seconds, and plugged it back in. It works now. No reboot, no reloading of X.
Maybe because the hardware wasn't designed to inform the software of a plug-in
event, so the OS (well, keyboard driver, to be precise) needs to poll at
regular intervals to detect the keyboard was absent, in order to re-initialize
the hardware?
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