A limit on number of USB hubs in Windows 7?

[Grandfather of TOS]

Because I have intuition. If they are so good take them back and ask for a
refund and buy something else.

"Yousuf Khan" wrote in message

get better quality hubs, make sure all of them are the same brand.

How do you know they aren't all that already?

Yousuf Khan

 

[R. C. White]

Hi, Gordon.

Well, I found some pictures of your P7P55D ASUS (NOT AZUS) motherboard at
ASUS.com, but that website is quite dysfunctional when trying to get into
the details of the board. :>( Much better views are available from NewEgg
at:
http://www.newegg.com/Product/Product.aspx?Item=N82E16813131404

That board has 12 or 14 USB 2.0 ports, including 6 or 8 (depending on which
web page you are looking at) on the backplane, with 2 of those near the
round PS/2 keyboard and mouse ports. My guess is that any of these
backplane ports would perform identically, and so would whatever port - such
as your front-panel port - that you might have plugged into one of the 3
internal connectors, which support 2 ports each.

So the problem must be within your DYNEX hub. It apparently is doing
something to the USB signal as it travels from the mainboard port through
the hub to the USB-out port on the hub. Bypassing that hub - as you've now
done - may be your only solution.

About the only other thing I can think of is that your DYNEX hub might need
an updated driver. Have you asked DYNEX about this?

RC
--
R. C. White, CPA
San Marcos, TX
(e-mail address removed)
Microsoft Windows MVP
Windows Live Mail 2010 (15.3.2804.0607) in Win7 Ultimate x64


"Antares 531" wrote in message

Hi, Gordon.

Well, I made an obvious typo in the first sentence of my last post. It
should say:

Have you tried plugging your DYNEX hub's INPUT cable into one of the other
ports? Find a port that makes your keyboard work properly without the hub.
Then move the keyboard's USB connector from there to the DYNEX hub - and
move the hub's connector to where you just unplugged the keyboard.

That was all it took for my unpowered cheapie $10 Targus hub from Wal*Mart
to work for my rig. My hub plugs into one of the 4 mainboard ports, then
its 6' cord lets its 4 connectors lie on top of my computer case, just
about
3 feet from my keyboard. My theory is that this eliminates any kind of
driver for the hub itself (except what is built into Win7), letting signals
(and power) travel straight through from the mobo/BIOS/USB/hub/USB
transceiver - then wirelessly to the keyboard.

RC

I tried plugging the DYNEX hub into some of the ports other than the
one that is located by the motherboard's conventional round sockets
(can't remember what they're called) but the result was the same. I
don't have these lock-up problems very frequently...two or three times
a week, usually.

The only setup that seemed to get around these lock-up problems was to
plug the keyboard and mouse into the computer's USB sockets on the
front panel of the computer...with no USB hub.

 

[Yousuf Khan]

Because I have intuition. If they are so good take them back and ask for
a refund and buy something else.

Ah, I see, you use the same method of purchasing computer gear as you do
for ladies' purses?

Yousuf Khan

 

[Bob I]

No, one of them was, and that was the one with the biggest problems. The
problems got slightly better when I removed the power cord from it.

When it was self-powered, eventually it started crashing the machine.
Not right away, but the problems got worse and worse until the machine
got unstable and crashed. When I removed the power cord from it, it
would just sometimes fail to enumerate, but it wouldn't crash the machine.

Yousuf Khan

Sounds like a flaky hub.

 

[Antares 531]

Thanks, R.C. for your help. I checked the DYNEX web site but didn't
find any information on driver updates. I am wondering if my Windows 7
automatic update function would take care of this. It does an
automatic update from time to time and seems to catch most other
hardware/software update requirements.

Could this possibly be a problem with the interrupt sequence?

I may try another USB hub and see if this solves the problem. Actually
the problem isn't something severe. It seems to pop up only once or
twice a week, and it takes only a few seconds to unplug then re-plug
the DYNEX cable.

Gordon

 

[Antares 531]

I may have just discovered something relating to this problem. I use a
Lexmark Z715 Color Ink Jet printer, but don't leave it turned on all
the time. If I turn it off, then turn it back on I seem to get this
drop-out of my DYNEX hub. This may just be coincidence, or there may
be some interaction here.

The Lexmark printer keeps asking me to "register" it but when I try to
do so the site that comes up does not provide a choice for this
specific printer, so, it is still not registered, and I get an error
message about this every time I use the printer.

Gordon