ubuntu 14.04: USB 3.0 Display Video Adapter: extreme slow

ndeubert · 09-09-2015, 01:41 PM

I also have a real problem with DisplayLinkManager eating up my CPU, see the attached screenshot (sometimes it said it was as high as 111%).

There is also significant lag on the 2 DisplayLink monitors making it almost impossible to swiftly use the mouse. I am using Ubuntu 15.04. For me restarting doesn't make much difference the lag is still significant. I am using this with a ThinkPad lenovo USB 3.0 dock. If you need any more information please ask.

pateretou · 09-10-2015, 10:53 AM

same issue here with a lenovo USB 3.0 dock and ubuntu 15.04

ubuntu · 09-15-2015, 03:50 PM

Same problem here. Running Ubuntu 15.04 with the latest driver installed. Connected a HiDPI (3840 x 2160) external Monitor to the dock using the DisplayPort. The Video output on the external Monitor is extremely delayed. If I connect the HiDPI Monitor directly to the Laptop (also DisplayPort) everything runs smoothly.

@DisplayLink: Do you need any further information to analyze this problem?

mlukaszek · 09-16-2015, 07:16 AM

Hi,

Does the situation improve when you use other desktop environment than default Unity? (e.g. KDE or Gnome)

If you could also attach the output of dmidecode from your systems, we could try to determine if your configurations have something in common.

Thanks,
Michal

pateretou · 09-17-2015, 06:57 AM

Same issue with gnome, or cinnamon. Never tried unity.

dmidecode attached

kTran · 09-17-2015, 09:50 AM

Same issue here also

Connected two external displays and each of them is a bit laggy. Nothing impossible to handle, but still bothering sometimes when the mouse doesn't follow precisely...

Using xfce with xUbuntu.

Here is my dmidecode attached.

xenith · 10-06-2015, 07:58 PM

I recently just purchased an adapter with a DL-5xxx series chip and was unpleasantly surprised that when connecting two displays at 1080p it appears that it down clocks the refresh-rate to 30fps / Hz

Is that simply what is going on here? Am I wrong in my assessment that if we want two displays connected simultaneously, we're stuck at 30Hz?

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09-10-2015, 10:53 AM	#2
pateretou Junior Member Join Date: Aug 2015 Posts: 6	same issue here with a lenovo USB 3.0 dock and ubuntu 15.04

09-15-2015, 03:50 PM	#3
ubuntu Junior Member Join Date: Sep 2015 Posts: 1	Same problem here. Running Ubuntu 15.04 with the latest driver installed. Connected a HiDPI (3840 x 2160) external Monitor to the dock using the DisplayPort. The Video output on the external Monitor is extremely delayed. If I connect the HiDPI Monitor directly to the Laptop (also DisplayPort) everything runs smoothly. @DisplayLink: Do you need any further information to analyze this problem?

09-16-2015, 07:16 AM	#4
mlukaszek Senior Member Join Date: Feb 2010 Posts: 386	Hi, Does the situation improve when you use other desktop environment than default Unity? (e.g. KDE or Gnome) If you could also attach the output of dmidecode from your systems, we could try to determine if your configurations have something in common. Thanks, Michal

10-06-2015, 07:58 PM	#7
xenith Junior Member Join Date: Oct 2015 Posts: 6	I recently just purchased an adapter with a DL-5xxx series chip and was unpleasantly surprised that when connecting two displays at 1080p it appears that it down clocks the refresh-rate to 30fps / Hz Is that simply what is going on here? Am I wrong in my assessment that if we want two displays connected simultaneously, we're stuck at 30Hz?