Latest DisplayLink drivers and DirectX fullscreen errors

[Kushan]

Originally Posted by Fektoer

Fair enough, i was a bit too enthusiastic with my response. Mine is connected with a single usb cable too. So yes, it might not be as easy as a simple throughput.

http://accessories.us.dell.com/sna/p...n&sku=332-0446

Going by the description of the product you would assume it could handle an HD display with less problems. Especially since it's advertised as being able to connect two displays at once. I don't wanna know what it would do to my cpu if i would have 2 1920x1080 displays in extended setup...

And yes, i would accept a bit of slowdown. But i won't accept incompatibility with software or issues like persistent fps drops. Especially for the price they come at.

I completely agree with you, the compatibility issues are indeed a problem and even if they can't fix it, they need to be more up front about it.

Interestingly, I don't actually see large CPU spikes on my setup and I am running 2x 1080p monitors

[Fektoer]

Weird. No idea what causes it then. What threw me for a loop and nearly made me return my laptop since i thought it had faulty hardware, was the fact that during my fps drops none of my performance meters would indicate a problem. I could see the displaymanager service hogging up a lot of cpu power, but no spike or anything that would indicate a performance loss. The displaymanager service would hog up nearly the same amount of cpu percentage when the laptop was performing fine.

[Kushan]

Originally Posted by Fektoer

Weird. No idea what causes it then. What threw me for a loop and nearly made me return my laptop since i thought it had faulty hardware, was the fact that during my fps drops none of my performance meters would indicate a problem. I could see the displaymanager service hogging up a lot of cpu power, but no spike or anything that would indicate a performance loss. The displaymanager service would hog up nearly the same amount of cpu percentage when the laptop was performing fine.

I wish I could offer more insight on what's causing that. For such a detrimental but sporadic performance drop, I can only presume it's a race condition, something is blocking something else that's time sensitive, likely stalling the graphics card. It might not even be the displaylink software, though obviously that's the likely culprit.

[Fektoer]

This weekend will probably establish that when i put in some more hours behind my laptop. As it stands, removing the drivers instantly fixed the directx problems of aforementioned games and gave a noticable gfx improvement on games like Diablo 3. So far i have had no fps drops anymore but then again, i went without fps drops for a few days before (only to have it drop every 15 min or so the days after). So i'm hopeful.

At first i thought it was a problem concerning windows 8.1 and external gpus. A blizzard representative said that they had problems before with applications switching to the internal gpu instead of using the more powerful external gpu using windows 8.1 and geforce drivers. However, it happens with every application (not only blizzard applications), different gfx drivers and different OS (windows 7).