<div dir="ltr">Hi everyone I'm using dualheads monitor like described here (<a href="http://www.thinkwiki.org/wiki/Xorg_RandR_1.2#the_Virtual_screen">http://www.thinkwiki.org/wiki/Xorg_RandR_1.2#the_Virtual_screen</a>) I have: laptop HP nc6400 onboard video: intel 945GM Internal monitor: 1280x800 External monitor: 1680x1050 (Samsung SyncMaster 205bw) X.Org X Server 1.4.2 Release Date: 11 June 2008 X Protocol Version 11, Revision 0 Build Operating System: Linux Debian (xorg-server 2:1.4.2-2) Current Operating System: Linux serenity 2.6.25-2-686 #1 SMP Fri Jul 18 17:46:56 UTC 2008 i686 Build Date: 18 July 2008 11:09:10AM So, I setup dualheads by grandr, and place one above enother. On external I have a ripple (horizontal lines from left to right) when: * when mouse pointer move * when window move * when window move on enternal monitor * when run glxgears test on external monitor * when rub glxgears test on enternal monitor, but when window of glxgears maximized on enternal monitor, the ripples is disspeared This is a problem of my video card? or monitor? or X Window? or it's a wrong settings? or bad cable from monitor to video card? or bad power? Any adeas? </div>