Acutus
01-03-2010, 01:03 PM
I just wanted to share my solution for a DisplayLink problem with you. Maybe it also works for others.
I have a Lenovo T500 with switchable graphics (ATI) running Windows 7 Prof. I recently bought a DisplayLink adapter to use a third monitor with my notebook. With switchable graphics enabled I installed the latest DisplayLink drivers, rebooted and connected the adapter. It worked immediately.
But when I booted my computer the next time, the adapter stopped working and everytime I connected it with my computer, Windows did not recognize the device and displayed an "Unknown device" message. I tried almost everything, but the adapter would just not be recognized (other usb-ports/cables, reinstalled the drivers, disabled switchable graphics, etc.).
But finally I fixed it! With switchable graphics disabled, I disconnected the DVI-side of the adapter from my monitor and connected it via USB only to my computer.... and now the adapter was recognized correctly by Windows! I plugged in the DVI cable again and the third monitor worked again. And since then it just works (however I did not yet try to reenable switchable graphics).
So if you're having such an "Unknown device" problem maybe you should try connecting the adapter without the DVI-cable plugged into the adapter. At least for me, that worked.
I have a Lenovo T500 with switchable graphics (ATI) running Windows 7 Prof. I recently bought a DisplayLink adapter to use a third monitor with my notebook. With switchable graphics enabled I installed the latest DisplayLink drivers, rebooted and connected the adapter. It worked immediately.
But when I booted my computer the next time, the adapter stopped working and everytime I connected it with my computer, Windows did not recognize the device and displayed an "Unknown device" message. I tried almost everything, but the adapter would just not be recognized (other usb-ports/cables, reinstalled the drivers, disabled switchable graphics, etc.).
But finally I fixed it! With switchable graphics disabled, I disconnected the DVI-side of the adapter from my monitor and connected it via USB only to my computer.... and now the adapter was recognized correctly by Windows! I plugged in the DVI cable again and the third monitor worked again. And since then it just works (however I did not yet try to reenable switchable graphics).
So if you're having such an "Unknown device" problem maybe you should try connecting the adapter without the DVI-cable plugged into the adapter. At least for me, that worked.