Quote:
Originally Posted by miller5369
1. Can someone please tell me if there is an advantage to using a DL-3X00 device on a USB2 Mac like this? If I used a StarTech DisplayPort DL-3500 adapter or Diamond DL-3900 DV100 adapter, does it provide optimized video speed over a DL-195 device over USB2? Is there any advantage to upgrading using the same 1920x1200 monitor?
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Yes, there will be differences. The USB 3.0 DL-3000 devices use a completly different compression system, called DL3. USB 2.0 devices use the older compression called DL2.
From our testing, DL3 can give a better experience, especially if playing back video on a new Mac.
Quote:
Originally Posted by miller5369
2. From what I understand, DL-3X00 devices allow resolutions up to 2560x1600. So instead of a Dell 2709W at 1920x1200, you could run a Dell U2711 or U2713 at 2560x1440 or U3011 or 2560x1600. For those of us stuck with USB2, is this the only advantage to upgrading to DL-3X00 chipset devices?
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As I've said above, there are other advantages as it still uses the new compression on USB 2.0. 2560x1600 DisplayPort adapters based on the DL-3xxx are also supported on USB 2.0.
Quote:
Originally Posted by miller5369
I've also experienced two issues with the alpha drivers:
1. Rotation works perfectly with the new 2.0a2 drivers. But I still get lots of display flickering when showing video or HTML5 content in Safari -- http://www.icloud.com is a perfect epileptic test for the flickering. It's all over the place using Safari, but doesn't happen in Firefox. This seems to be a known issue that may be fixed when 10.8.3 is released. |
Yes, this does seem to be an OS issue and occurs with any driver that installs a Graphics kernel extension. Hopefully Apple will fix this in 10.8.3 as we have raised the bug with them months ago.
Quote:
Originally Posted by miller5369
2. I see some horizontal screen stretching issues like the previous poster. See the attached image where the "r" in Worldwide and "m" in espn.com are stretched by one pixel. This happens in Firefox, but not Safari. Strange. This screen stretching behavior also happens when using Snapz Pro 2.5 -- the DisplayLink screen literally "jumps" and stretches 20 pixels horizontally when doing a screen capture.
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Again, this appears to be an OS issue, but we'll check this.
Wim