Why can't both my devices support 1650x1050?
 

I have 2 USB to VGA adapters which externally identify themselves as WS-UGA12D1. They were bought at different times and the external serial numbers are significantly different (WS000300097 and 3000400208).

The debug tool however, identifies them as follows:

Serial Number: USB_0198-450359
FW Version: 00.04
Product: WS Tech USB-DVI
Vendor: DisplayLink
Status is (F0005000):ASIC
Library: 0x0106, SVN status: Clean, SVN Revision 9971

Serial Number: USB_500365
FW Version: 00.15
Product: WS Tech USB-DVI
Vendor: DisplayLink
Status is (F1005001):ASIC
Library: 0x0224, SVN status: Dirty, SVN Revision 12991

Now, using the same display (Dell 2009W, 1650x1050 on DVI connection), the USB_0198-450359 with apparently older firmware (0.04) supports 1650x1050, while the other device will only display 1440x900 on the same monitor.

How do I get them both to display 1650x1050? Can I change the firmware? is there a 'force' option? Or is it a hardware difference and I'm just stuck with it unless I get a newer device?

I'm running 5.4b1 under Windows 7.

Thanks.

2 configs - 1680x1050 & 1440x900
 

I've attached the debug info for my setup with the monitors connected both ways round, i.e. with the 2009W connected to get 1680x1050 and where it will only give 1440x900.

Regards

Works with 2009W (1680x1050) + P2010H (1600x900)
 

I tried with a different combination of monitors (all Dell)

E170S + 2009W: Will only display 1680x1050 on specific USB device. Swapping switches the 2009W to 1440x900, The E170S is running at 1280x1024.

P2010H + 2009W: Displays 1600x900 + 1680x1050 independent of which device is used.

2009W + 2009W: Displays 1680x1050 and 1440x900. The different resolution follows the different USB adapter.

I tried collecting the debug info but the program seemed to hang at "Gathering DisplayLink Software Installed version". If you want, I can try again.

Is there some limitation on the combined display resolution of 2 devices?

Hi

Thanks for the log files. I think the difference in the resolution you are finding is due to there being different DisplayLink chips in the devices.

I think the first device is based on the DL-160, which has a maximum resolution of 1680x1050. The second device is based on the DL-125, which has a maximum resolution of 1400x900. This is why you are seeing a difference in the resolutions.

Thanks

Wim

Same model, different chips?
 

Annoyingly, they are both labelled as Model:WS-UGA12D1, so I can only distinguish by serial number.

It's not DisplayLink's fault, but how come the manufacturer can produce 2 devices with different chips, hence different capabilities, yet market them as the same model?!

Unfortunately, even if I bought another one, I presumably can't guarantee to get the DL-160 chips since I might get old stock unless I specify it must support 1680x1050.

When was the newer chip released?

As you have noticed, the manufacturer produced 2 devices with 2 different chips and for some reason did market them as the same model.

DisplayLink DL-1x5 Series were released in 2009 while the older Series DL-1x0 were released in 2008.

More information about DisplayLink hardware can be found here:

http://www.displaylink.com/displaylink_hardware.html

Regards