found it: Ubuntu/ Xorg is the culprit (partly?).<br><br>in the &#39;default&#39; situation at start-up Xorg first recognizes the Intel810 and loads the Intel-driver,<br>but after that concludes that it wants a VESA driver.<br>
<br>when i made a xorg.conf to change the amount of VideoRam, the loading of the VESA driver was gone, but in GEM my pictures were completely white, only the background color was visible. <br>where outside GEM everything looked normal.<br>
<br>this was finally solved by defining a Depth in Xorg.conf.<br>probably the lack of this parameter made GEM say: using 8 color bits.<br><br>rolf<br><br>in case somebody is confronted by this same problem my Xorg.conf is hereby included.<br>
<br><br>Section &quot;Device&quot;<br>Identifier &quot;imonitor&quot;<br>Driver &quot;intel&quot;<br>VideoRam 16384<br>EndSection<br><br>Section &quot;Monitor&quot;<br>Identifier &quot;Generic Monitor&quot;<br>EndSection<br>
<br>Section &quot;Screen&quot;<br>Identifier &quot;Default Screen&quot;<br>Device &quot;imonitor&quot;<br>Monitor &quot;Generic Monitor&quot;<br>DefaultDepth    24<br>SubSection &quot;Display&quot;<br>    Depth    24<br>    Modes    &quot;1024x768&quot; &quot;800x600&quot;<br>
EndSubSection<br>EndSection<br><br>