[xubuntu-users] no ps2 mouse?

Fred Roller fredroller66 at gmail.com
Thu May 1 04:16:26 UTC 2014

On 04/30/2014 11:55 PM, Ralf Mardorf wrote:
> That's wrong, at best it's a half-truth.
> "Sometimes, devices that would be hot-pluggable may appear to only be
> cold-pluggable because of deficiencies in the system software. For
> example, PS/2 pointer devices are generally hot-pluggable (although they
> are not designed to be), but Microsoft Windows 95 and related operating
> systems would commonly have to be rebooted every time a PS/2 mouse was
> replaced, in order to detect the new mouse." -
> https://en.wikipedia.org/wiki/Hot_swapping
> "Hotplugging
> PS/2 ports are designed to connect the digital I/O lines of the
> microcontroller in the external device directly to the digital lines of
> the microcontroller on the motherboard. They are not designed to be hot
> swappable. Hot swapping PS/2 devices usually does not cause damage
> because more modern microcontrollers tend to have more robust I/O lines
> built into them which are harder to damage than those of older
> controllers; however, hot swapping can still potentially cause damage on
> older machines, or machines with less robust port implementations.
> If they are hot swapped, the devices must be similar enough that the
> driver running on the host system recognizes, and can be used with the
> new device. Otherwise, the new device will not function properly. While
> this is seldom an issue with standard keyboard devices, the host system
> rarely recognizes the new device attached to the PS/2 mouse port. In
> practice most keyboards can be hot swapped but this should be avoided.
> Durability
> PS/2 connectors are not designed to be plugged in and out very often,
> which can easily lead to bent or broken pins. PS/2 connectors insert in
> only one direction and must be rotated correctly before attempting
> connection. Most but not all connectors include an arrow or flat section
> which is usually aligned to the right or top of the jack before being
> plugged in. The exact direction may vary on older or non-ATX computers
> and care should be taken to avoid damaged or bent pins when connecting
> devices. This issue is slightly alleviated in modern times with the
> advent of the PS/2-to-USB adapter: users can just leave the PS/2 plugged
> into the PS/2-to-USB adapter at all times and not risk damaging the pins
> this way." -https://en.wikipedia.org/wiki/PS/2_port
Cool. Thanks for the research.

- Fred

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