2.5 beta 1

[paultzirides]

Just wanted to say that the current beta driver is working phenomenally on my 2012 MacBook Air 11" connected to an Anker USB 3.0 dock (only one monitor connected currently).

[Rymek]

using 2.5b1. Horrible performance and graphical corruption (same as with 2.4). Using external monitor with usb to hdmi dongle by unitek in general slows down whole system graphic performance wise. Attached 2 screenshots with examples of corruption.

And to give better understandin of what's happening when I plug in external display - without it whole system seems to be running at 60fps more or less, when plugging in the external everything slows down to 10fps (desktop switching, app switching etc.)

I'm not sure if switching to dell D3100 would be better option. It seems that it can handle 4k + 2xFullHD displays but i don't want to get stuck with expensive docking station and same issues....

Using El Capitan GM Beta and Macbook Pro 13" early 2015

[Carlo]

Originally Posted by Rymek

using 2.5b1. Horrible performance and graphical corruption (same as with 2.4). Using external monitor with usb to hdmi dongle by unitek in general slows down whole system graphic performance wise. Attached 2 screenshots with examples of corruption.

And to give better understandin of what's happening when I plug in external display - without it whole system seems to be running at 60fps more or less, when plugging in the external everything slows down to 10fps (desktop switching, app switching etc.)

I'm not sure if switching to dell D3100 would be better option. It seems that it can handle 4k + 2xFullHD displays but i don't want to get stuck with expensive docking station and same issues....

Using El Capitan GM Beta and Macbook Pro 13" early 2015

Hi Rymek,

This kind of corruption usually happens when an application is trying to use hardware accelerated content on a virtual screen or when there is an issue with the software renderer for 3D content.

OS X does not support hardware acceleration on virtual displays so applications have to query display capabilities for each display and render accordingly.
The same applies to any USB or wifi screen with the exception of AirPlay that uses a proprietary interface.

Unless the public OS interfaces change I'm afraid we cannot do anything for this kind of problems. However application developers can ensure correct rendering if they are aware of these issues, I'd suggest to contact them.

About performance I think we can definitely improve the frame rate on our screens but any other slowdowns are again a systemic issue due to the fact that some screens are accelerated and others not.
You are welcome to join us in requesting better support for virtual screens from Apple!

Best regards,
Carlo

[Rymek]

I'm not really sure if the performance problem is entirel apple's fault. I think it might be hardware issue. I've watched quite a few presentations of your products on youtube and the playback was pretty smooth (esp. Dell D3100 which streams in 4k, so that had to be smooth). In general my feeling is that external screen connected through the dongle is not really keeping up 60Hz.

I still wonder if on that Dell docking station it would be any better.

[Carlo]

Originally Posted by Rymek

I'm not really sure if the performance problem is entirel apple's fault. I think it might be hardware issue. I've watched quite a few presentations of your products on youtube and the playback was pretty smooth (esp. Dell D3100 which streams in 4k, so that had to be smooth). In general my feeling is that external screen connected through the dongle is not really keeping up 60Hz.

I still wonder if on that Dell docking station it would be any better.

Hi Rymek,

Our USB3 product line does indeed allow for better performance than the USB2 line (not just because of the added bandwidth) but apart from that the key improvements have to come from SW.

So if you already have a USB 3 device I would not recommend to get another one on a performance basis.

In any case the message is clear: better performance needed. We'll be working on that.

Best regards,
Carlo

[Rymek]

I've sent you debug log output through PM, not sure if you got it.

It's USB2.0 dongle actually, that's why i'm considering USB3.0

[jaknudsen]

The 2.5b1 version seems to have disappeared from the download page? http://www.displaylink.com/downloads/mac_downloads.php

[theta]

Had trouble when I upgraded to Yosemite last year, so I checked to make sure there was a driver for El Capitan. I downloaded 2.5 beta 1.
Unfortunately, it broke while still in Yosemite. I was hoping it would work in El Capitan. Not the case. It does look like the DisplayLink is currently working on the problem.

[Carlo]

Hi everyone,

If you have downloaded beta 1 we advise to uninstall it and delete the installation image.
We have hit a difficult issue at a very inappropriate moment with El Capitan just released. We are working on this as fast as we can.

Regards,
Carlo

[theta]

Thank you for the update Carlo!