PC Won't Boot (Doesn't pass POST) with USB Mouse connected to a hub

[destrekor]

This is mighty strange. I've had the problem since getting the keyboard, which was also my first dabble into USB hubs. And I've lived with it (or worked around it) for some time, but now I'm fed up enough to overcome my stubbornness and actually figure out WTH is wrong, I want it to work dammit!

[Background info: The mouse is a Razer DeathAdder)

My Logitech G110 (keyboard) has a USB port, and acts like a hub (since it is daisy-chaining). If I had my mouse plugged into the keyboard, the system wouldn't pass POST. Unplugged, it would boot fine (or plugged into the system itself). However, everything works perfectly fine when the system is actually running... it just doesn't boot in that configuration.

But now, I recently got a desk that has a built-in USB hub. I plug my keyboard into the hub, and my mouse as well. Doesn't pass POST. Same problem in a little different configuration.

One possibility is total power consumption over a single port. But what confuses me about that, is the fact that everything performs in good order when the system is on. If I plug the mouse back in after it passes POST, everything is good to go (including all the LEDs in the keyboard and mouse).

It's most convenient (and better in the long-run) as any other device I'd like connected to the hub requires USB Power, and I'd like more convenient access on the hub.

Oh and another thing - I can also use my Logitech G25 connected to the hub (with the mouse and keyboard)... but that doesn't require any USB power, it shouldn't at least, seeing as it has a power cord.

Is this simply a case where it will never work? I couldn't find anything in BIOS that clicked in my mind as a potential change to solve this issue.

I'm fine with unplugging the mouse every time, if that is what it takes to keep the mouse and keyboard (or dare to ever get something better); I'd rather not do it, if at all possible.

 

[muskie32]

Hmm... That is strange.. I have the the G11 Keyboard and it boots with the mouse plugged in it. Could there be something in the bios that you may need to change?

 

[corkyg]

WHat happens if you don't connect the mouse until AFTER the boot/load?

 

[destrekor]

WHat happens if you don't connect the mouse until AFTER the boot/load?

I stated that in the main post.

If I plug the mouse in after POST, everything works just fine. Nothing happens, in that case, other than what is supposed to happen.

 

[corkyg]

OK - try booting with the mouse in a different port, not the keyboard's. What happens then?

What I suspect is that the initial power requirement through the keyboard exceeds the capability of the USB port the keyboard is connected to. In order to be a fully capable hub, the keyboard should have its own power source. The Death Adder mouse more than likely requires more power than a regular mouse on startup.

 

[zagood]

Yeah, initial power draw is just too high. If possible, replace the built-in hub with a powered one like this:

http://www.newegg.com/Product/Produc...82E16817334015

Just an example.

 

[destrekor]

Well to update, I just decided I wanted a new mouse. When I took the old one out of the wire management maze and proceeded to get the new mouse's cord into place, I said "hell with it, to the back of the PC you go."

However, I am in the process of determining if my desk kit was supposed to include a power adapter for the USB hub, or if I can use a specific type. I swear the underside of the hub had a small round power slot, complete with a little metal prong in the middle coming off the circuit-board inside. Don't know what else it could be, but I surely didn't have a power adapter in the box and the desk's instruction manual had never mentioned such (only mentioned the included hub).

But yes, like the OP said, I had booted just fine with the mouse in a proper port instead of a hub port (be it the usb hub or the keyboard's daisy-chain port).
It's just so weird both devices worked fine on a hub together, if immediately put there after POST... but if sharing the same power at boot, they wouldn't.