I have installed Hardy from Beta with all updates applied. I think I have updated the ltsp tree once some time ago also. I have a problem with display performance. Under K12ltsp6 (ltsp4.2) I had tux maths, flash videos etc running well (and that was on an old system (AMD 2500XP with 2 GB RAM). I upgrade to Feisty on a Quad Core Intel machine with 4 GB RAM. Again Flash and other graphics was fine. Now I have installed Hardy, screen redraws are slow even on ordinary web pages and Flash videos are especially jerky. (I have turned off hardware acceleration for flash.) I have LDM_DIRECTX=True. I have tested it with echo $DISPLAY and directx seems to be working. I suspect that the wrong driver is being used for the graphics card. I am not sure which one. If I do lspci on the client it says: 01:00.0 VGA compatible controller : ATI Technologies Inc 3D Rage Pro 1x/2X (rev 5c) I tried the following settings for xserver one by one: XSERVER=vesa XSERVER=ati XSERVER=radeon I also tried X_COLOR_DEPTH=16 Each time all I got was a black screen with a white dash flashing in the top left corner. Using lsmod the only thing which seemed relevant was: intel_agp 25492 1 agpgart 34760 1 intel_agp When the xserver does start, I see this error when I press ALT-CTL-F1: OIL: ERROR liboiltest.c 361: oil_test_check_impl(): illegal instruction in mmxCombineAddU Can anyone give me advice how to troubleshoot my poor graphics performance? Should I try updating the ltsp image? I think my current version is 2008212-ubuntu3. Perhaps version ubuntu4 will fix my problem. Can I just do: sudo chroot /opt/ltsp/i386/ sudo apt-get upgrade sudo ltsp-client-build Or do I have to start from scratch (delete /i386 directory then run ltsp-build-client)? Is there another graphics driver I need to load etc.? Which log files can I look at? How can I export them to the server so I can look at them more easily and email them? All help appreciated. Thanks. Krsnendu dasa