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Do post a follow up if you find a solution, or at least the cause. I'm probably more curious than you are.
I wonder if a USB traffic analyzer would reveal anything useful.
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I think I've found one "solution"...
I've went into the BIOs and changed the way USB ports are handled and changed from AUTO to USB3.0 only.
After doing that windows are moving much smoother, but, there's always a but... now my keyboard an mouse are not working at all... 
So... as I've ought that laptop as a desktop replacement and I do need the keyboard and mouse and I do not plan to connect and disconnect every single day 4 cables to my laptop... I'll have to live with that stupid behavior until:
A) I get a proper docking station (ThinkPad Ultra or similar).
B) Someone is pushing a firmware update that makes it capable for the USB dock to separate the USB 2.0 and USB 3.0 flow and make both to work correctly.
PS: curiously videos are working perfectly (no lag...)
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That's interesting.
So now that your display's working better, I'd suggest trying to switch it from USB3 and back to Auto to try to get your mouse/keyboard working again (and see if the original problem comes back). The theory being, the switch to USB3 may have triggered a configuration change that wasn't being done, and switching it back to Auto (where you'd think it should be) could now start working properly...?
Just speculation from my part, but it's worth a shot. Also, try changing ports for your mouse/keyboard. It sounds like one of those trial and error situations, with little else to go on with...
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No luck with that...
Now Lenovo has pushed a new firmware/driver set and it has improved a little bit the behavior, but not as much as it should... it still lags, but it seems it depends on the content of the window being dragged... i.e. outlook 2013 is terrible while other windows are not so bad...
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Hi again dandy72,
Regarding the USB 3.0 docking station...
I've tried a couple of things more:
1. installing the "USB 3.0 extensible host controller driver" from Intel.
2. installing the newest drivers (with firmware) from DisplayLink.
Now it looks much better... it is still lagging a little, I've not seen any disconnection from then (but it is been like this for less than one week)...
Not perfect, but better...
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I appreciate the follow-up after this much time.
I wouldn't be telling you anything you don't already know by saying it normally comes down to drivers/firmware...good to know it's gotten better with newer versions. Getting the latest host controller from Intel is probably a big contributor. I wonder if the motherboard manufacturer (OEM?) would have a custom driver that's further optimized? Though personally I tend to stick with those from Intel itself (as far as motherboard drivers go).
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Message Closed
modified 24-Mar-15 5:41am.
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Message Removed
modified 24-Mar-15 5:42am.
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Movie Quote Of The Day
I know. I've been really naughty, haven't I? Maybe a good spanking's in order?
Which movie?
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ANOTHER Disney movie? This must be from "Lady and the Tramp"?!?!? 
Anything that is unrelated to elephants is irrelephant
Anonymous
-----
The problem with quotes on the internet is that you can never tell if they're genuine
Winston Churchill, 1944
-----
I'd just like a chance to prove that money can't make me happy.
Me, all the time
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The World According to V...
Skipper: We'll fix it.
Alex: Fix it? How you gonna fix this?
Skipper: Grit, spit and a whole lotta duct tape.
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 5+ !
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St Trinians.
Probably. 
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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Rambo 1-99
if(this.signature != "")
{
MessageBox.Show("This is my signature: " + Environment.NewLine + signature);
}
else
{
MessageBox.Show("404-Signature not found");
}
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ButtPatlo 
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Someone has to say it.
One Night In Paris.
Mongo: Mongo only pawn... in game of life.
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Any run of the mill porno.
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Sarah Palin: the Amish days
There are two kinds of people in the world: those who can extrapolate from incomplete data.
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Zoot and the Grail-shaped Beacon. 
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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Journey to the Center of the *BLEEP*
or, alternatively...
Seven II: This Time It's Fantasy
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Reminds me of Snow White and the Seven Dominatrix.
Mongo: Mongo only pawn... in game of life.
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Fifty shades of secretary.
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That was the movie where the devil was driving the one and only adequate car.
The language is JavaScript. that of Mordor, which I will not utter here
This is Javascript. If you put big wheels and a racing stripe on a golf cart, it's still a f***ing golf cart.
"I don't know, extraterrestrial?"
"You mean like from space?"
"No, from Canada."
If software development were a circus, we would all be the clowns.
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That's because while Lamborghini does make a "Diablo", it doesn't make a car called "Loser" 
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