Display corruption with Lilliput UM-70 USB Monitor

kalzekdor · 01-06-2012, 04:01 PM

I've recently purchased a Lilliput UM-70 7" USB Monitor, and have noticed some problems when displaying any sort of hardware accelerated graphics. There is nothing shown, unless there is some other graphical overlay, such as a magnifier app, manually over top of the window, in which case the entire display works perfectly. The problem seems to be a refresh/sync issue; the graphics are drawn fine, but are not updated to the screen unless something causes a redraw of the screen, which causes the display to be updated properly, but only for the single frame (unless something is causing repeated redraws, such as a magnifier or some other overlay). It's certainly capable of rendering everything, it's just not syncing the display properly.

There's a sticky thread about this, but the solution is only for Windows 7. What about under Windows Vista?

kalzekdor · 01-06-2012, 04:51 PM

It seems restarting the computer and having the monitor connected at startup solved the issue, at least for now. Don't even need to use Aero, thankfully.

Wim · 01-06-2012, 05:49 PM

Its the same in Vista, but we're working on a fix that would be compatible for Vista and Win 7.

Wim

01-06-2012, 04:01 PM	#1
kalzekdor Junior Member Join Date: Jan 2012 Posts: 2	Display corruption with Lilliput UM-70 USB Monitor I've recently purchased a Lilliput UM-70 7" USB Monitor, and have noticed some problems when displaying any sort of hardware accelerated graphics. There is nothing shown, unless there is some other graphical overlay, such as a magnifier app, manually over top of the window, in which case the entire display works perfectly. The problem seems to be a refresh/sync issue; the graphics are drawn fine, but are not updated to the screen unless something causes a redraw of the screen, which causes the display to be updated properly, but only for the single frame (unless something is causing repeated redraws, such as a magnifier or some other overlay). It's certainly capable of rendering everything, it's just not syncing the display properly. There's a sticky thread about this, but the solution is only for Windows 7. What about under Windows Vista? Last edited by kalzekdor; 01-06-2012 at 04:20 PM.

01-06-2012, 04:51 PM	#2
kalzekdor Junior Member Join Date: Jan 2012 Posts: 2	It seems restarting the computer and having the monitor connected at startup solved the issue, at least for now. Don't even need to use Aero, thankfully.

01-06-2012, 05:49 PM	#3
Wim Senior Member Join Date: Feb 2009 Posts: 1,561	Its the same in Vista, but we're working on a fix that would be compatible for Vista and Win 7. Wim