Slow Performance - Toshiba Dynadock U3.0

[benk]

I'm hoping someone can help with a performance issue I'm having. Debug attached.

Issues

• Ethernet running at 10mbit
• Very slow network performance
• System very slow when transferring network files

Configuration

• Microsoft Surface Pro
• Windows 8.1
• Displaylink 7.5M0 Drivers

[benk]

anyone from DisplayLink?

[Wim]

The logs show the Ethernet is working correctly and has low ping times:

Pinging www.google.com via DL DeviceDisplayLink Network Adapter NCM

Pinging www.google.com [74.125.237.180] from 10.0.0.105 with 32 bytes of data:
Reply from 74.125.237.180: bytes=32 time=11ms TTL=57
Reply from 74.125.237.180: bytes=32 time=9ms TTL=53
Reply from 74.125.237.180: bytes=32 time=10ms TTL=53
Reply from 74.125.237.180: bytes=32 time=12ms TTL=57

Ethernet at 10Mbit is slow and will probably be slower than your broadband connection. What speed are you seeing? I would not expect to see more than 1MB/sec on a file transfer.

Wim

[benk]

That is one part of the problem. The dock is connected to a 100mbit switch, other laptops using the exact same port on the switch with exact same cable run at 100mbit.

The other problem is that with the dock connected file transfers over the internal Surface Pro wifi adapter is significantly slower than when it is unconnected.

Do you have a standard software to log transfer speeds to upload here?

[Wim]

Originally Posted by benk

That is one part of the problem. The dock is connected to a 100mbit switch, other laptops using the exact same port on the switch with exact same cable run at 100mbit.

Are you definately connecting to a switch at full duplex? Half duplex is not supported (Ethernet hubs) and would cause slow Ethernet speeds.

Originally Posted by benk

The other problem is that with the dock connected file transfers over the internal Surface Pro wifi adapter is significantly slower than when it is unconnected.

That will probably be due to USB 3.0 interference:

http://www.displaylink.com/support/ticket.php?id=340

Originally Posted by benk

Do you have a standard software to log transfer speeds to upload here?

It should be line rate (or close to) speeds on Ethernet

Wim

[benk]

Thanks for the info on the USB 3.0 and wifi interference. I will relocated the dock and test.

Im sure it is full duplex. It is a 10/100 switch not a hub. Do you have any other suggestions?

[Wim]

Originally Posted by benk

Im sure it is full duplex. It is a 10/100 switch not a hub. Do you have any other suggestions?

I've not heard of this before and not had other users raise it. This leads me to think there is a subtle hardware problem with the dock that is preventing speeds above 10MBit being auto negotiated.

Wim

[benk]

I recently had windows 8.1 install some updates (it was already win 8.1) and now it appears to be slow all the time. I can type faster than the text appears in the reply box..... to give you an example. The mouse is also laggy on the 2nd monitor.

Is there any known issues with the latest windows updates or is this a coincidence?

Latest support files attached.

[JamesH]

Hi,

Does this happen in any mode or only Notebook monitor off mode?

Thanks,
James

[benk]

Hi,

It happens in all modes

Cheers