I use the USB VGA adapter(for a 3rd display) on a HP laptop running Win 7 Home Premium 64 bit for about a year. The 2nd display is connected to the VGA port of the HD 6550 video card.
Starting last week, it was acting up. Basically, windows can’t see or extend to the 3rd additional display. I reinstalled the driver 5.6M2 (also tried the latest 6.3), and it worked again once, each time right after new driver is installed.
As soon as I reboot the machine, it didn’t work agan. It seems to work best the first time when the DisplayLink Manager recognized the new display and installed the driver.
I checked these
The displayLink Manager is running, under Services and under Task manager
Under Device manager, you can see USB Display Adapters - Plugable USB-VGA-165 - its Hardware Ids are USB\VID_17E9&PID_037B&REV_0101
But during one of the subsequent USB device driver installed (when plug in), I could see it as DisplayAdapter(8060) installed in the popup, which indicates it may have some kind of problem loading the driver.
- I have tried both the 5.6M2 as recommended on Plugable page and the 6.3, the latest driver from DisplayLink which also supposes to work. I unplug the USB, went to add or remove programs to uninstall DisplayLink software and then use the download to install it back before plugging the USB back in.
Both works ONCE… the very first time after you installed the driver and plug into the USB.
- I have also change cables, monitors and the problem is repeatable.