Bug: Re-plugging PS/2 keyboard causes "repeat rate" loss

K

kimiraikkonen

Hi,
Having XP SP2 Pro, go to control panel -> keyboard and slide "repeat
rate" setting to the highest by default. No problem until...

Try and see:
If you plug out your PS/2 keyboard for a reason, then re-plug it, go
to control panel -> keyboard again, although "repeat rate" setting
seems on the highest level, it's completely fake. Repeat rate is
dramaticaly on the lowest speed if you plug out and re-plug PS/2
keyboard. You can test by typing on a text editor such as Notepad or
IE address bar.

Why is this bug?

Thanks.
 
E

Elmo

kimiraikkonen said:
Hi,
Having XP SP2 Pro, go to control panel -> keyboard and slide "repeat
rate" setting to the highest by default. No problem until...

Try and see:
If you plug out your PS/2 keyboard for a reason, then re-plug it, go
to control panel -> keyboard again, although "repeat rate" setting
seems on the highest level, it's completely fake. Repeat rate is
dramatically on the lowest speed if you plug out and re-plug PS/2
keyboard. You can test by typing on a text editor such as Notepad or
IE address bar.

Why is this bug?

Thanks.
Click to expand...

Another "bug" is when you remove a PS/2 mouse, then replace; it'll
usually freeze till you reboot. The answer? Don't unplug PS/2 devices.
It's a hardware problem.. some motherboards might handle it well,
others may not.

For *real* help, where keyboards and PS/2 are known on a first-name
basis, you might try a hardware group.
 
M

Mike Cawood, HND BIT

kimiraikkonen said:
Hi,
Having XP SP2 Pro, go to control panel -> keyboard and slide "repeat
rate" setting to the highest by default. No problem until...

Try and see:
If you plug out your PS/2 keyboard for a reason, then re-plug it, go
to control panel -> keyboard again, although "repeat rate" setting
seems on the highest level, it's completely fake. Repeat rate is
dramaticaly on the lowest speed if you plug out and re-plug PS/2
keyboard. You can test by typing on a text editor such as Notepad or
IE address bar.

Why is this bug?

Thanks.
Click to expand...

You are only supposed to plug & unplug PS2 keyboards & mice with the
computer SWITCHED OFF.
Regards Mike.
 
D

Detlev Dreyer

kimiraikkonen said:
Try and see:
If you plug out your PS/2 keyboard for a reason, then re-plug it,
Click to expand...

Nope. Never ever plug any PS/2 devices in or out under running Windows!
Why is this bug?
Click to expand...

What 'bug'. Note that PS/2 devices do not have the hotplug capability.
 
K

kimiraikkonen

Nope. Never ever plug any PS/2 devices in or out under running Windows!


What 'bug'. Note that PS/2 devices do not have the hotplug capability.
Click to expand...

But usually they work and recognized well (eg: keyboard) after re-
plugged on the PS/2 port on XP SP2 on some machines. But "repeat rate"
info gets lost if you re-plug maybe due to having PS/2 interface.
 
J

John John

kimiraikkonen said:
But usually they work and recognized well (eg: keyboard) after re-
plugged on the PS/2 port on XP SP2 on some machines. But "repeat rate"
info gets lost if you re-plug maybe due to having PS/2 interface.
Click to expand...

Don't do that! PS2 ports are not hotplug or hot swappable, doing that
on an older computer may damage the port and while newer computers may
have more robust ports it is still not advisable to yank and reconnect
to PS2 ports while the computer is running!

John
 
D

Detlev Dreyer

kimiraikkonen said:
But usually they work and recognized well (eg: keyboard) after re-
plugged on the PS/2 port on XP SP2 on some machines.
Click to expand...

No, you may even butcher the mobo with your games. See also
http://www.computer-engineering.org/ps2protocol/ (excerpt)

| The keyboard or mouse should not draw more than 275 mA from the host
| and care must be taken to avoid transient surges. Such surges can be
| caused by "hot-plugging" a keyboard/mouse (ie, connect/disconnect the
| device while the computer's power is on.) Older motherboards had a
| surface-mounted fuse protecting the keyboard and mouse ports. When
| this fuse blew, the motherboard was useless to the consumer, and non-
| fixable to the average technician. Most newer motherboards use auto-
| reset "Poly" fuses that go a long way to remedy this problem. However,
| this is not a standard and there's still plenty of older motherboards
| in use. Therefore, I recommend against hot-plugging a PS/2 mouse or
| keyboard.
But "repeat rate" info gets lost if you re-plug maybe due to having
PS/2 interface.
Click to expand...

No need to discuss any problems when messing around with PS/2 devices
beyond the specs.
 
P

Plato

kimiraikkonen said:
Having XP SP2 Pro, go to control panel -> keyboard and slide "repeat
rate" setting to the highest by default. No problem until...

Try and see:
If you plug out your PS/2 keyboard for a reason, then re-plug it, go
to control panel -> keyboard again, although "repeat rate" setting
seems on the highest level, it's completely fake. Repeat rate is
dramaticaly on the lowest speed if you plug out and re-plug PS/2
keyboard. You can test by typing on a text editor such as Notepad or
IE address bar.

Why is this bug?
Click to expand...

NOT a bug. Good thing you didn't toast your PC. PS/2 devices are meant
to be un-plugged/plugged in when the power cord is out.
 
S

smlunatick

But usually they work and recognized well (eg: keyboard) after re-
plugged on the PS/2 port on XP SP2 on some machines. But "repeat rate"
info gets lost if you re-plug maybe due to having PS/2 interface.
Click to expand...

It seems that you were extremely lucky! You never encountered a
motherboard that ythe PS/2 got blown. Extremely fustrating!!!
 

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