[Xorg-driver-geode] Flickering Seen On Changing Resolution

[pratish ganguly]

Dear all
I am having a customised linux distribution installed on a thin client
with the following configuration.
AMD LX800
Xorg version 7.2

The display driver that I am using is from xorg git
http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-amd.git;a=summary

I am using three resolutions
  800x 600
1024x 768
1280x1024

The problem that I am facing is that when I am changing the resolution ,
there is a flickering seen on the screen during X restart. Here is a list of
Modelines that i have tried out in my xorg.conf file

Modeline "800x600-56" 36.0000 800 824 896 1024 600 601 603 625 +HSync +VSync
Modeline "800x600-60" 40.0000 800 840 976 1056 600 601 605 628 +HSync +VSync
Modeline "800x600-70" 45.7199 800 840 920 1040 600 604 607 628 +HSync +VSync
Modeline "800x600-72" 49.5000 800 856 976 1040 600 637 643 666 +HSync +VSync
Modeline "800x600-75" 49.5000 800 816 896 1056 600 601 604 625 +HSync +VSync
Modeline "800x600-85" 56.2500 800 832 896 1048 600 601 604 631 +HSync +VSync
Modeline "800x600-90" 60.0649 800 840 928 1056 600 601 604 632 +HSync +VSync
Modeline "800x600-100" 68.1789 800 848 936 1072 600 601 604 636 +HSync
+VSync
Modeline "800x600-60" 40.0000 800 840 968 1056 600 601 605 628 -HSync -VSync
Modeline "1024x768-60" 65.0000 1024 1048 1184 1344 768 771 777 806 -HSync
-VSync
Modeline "1024x768-70" 75.0000 1024 1048 1184 1328 768 771 777 806 -HSync
-VSync
Modeline "1024x768-72" 78.7500 1024 1080 1192 1360 768 772 775 804 +HSync
+VSync
Modeline "1024x768-75" 78.7500 1024 1040 1136 1312 768 769 772 800 +HSync
+VSync
Modeline "1024x768-85" 94.5000 1024 1072 1168 1376 768 769 772 808 +HSync
+VSync
Modeline "1024x768-90" 100.1869 1024 1088 1200 1376 768 769 772 809 +HSync
+VSync
Modeline "1024x768-100" 113.3099 1024 1096 1208 1392 768 769 772 814 +HSync
+VSync
Modeline "1024x768-60" 65.0000 1024 1048 1184 1344 768 771 777 806 -HSync
-VSync
Modeline "1280x1024-60" 108.0000 1280 1328 1440 1688 1024 1025 1028 1066
+HSync +VSync
Modeline "1280x1024-70" 129.5999 1280 1368 1504 1728 1024 1030 1033 1071
+HSync +VSync
Modeline "1280x1024-72" 133.5000 1280 1368 1504 1728 1024 1031 1034 1073
+HSync +VSync
Modeline "1280x1024-75" 135.0000 1280 1296 1440 1688 1024 1025 1028 1066
+HSync +VSync
Modeline "1280x1024-85" 157.5000 1280 1344 1504 1728 1024 1025 1028 1072
+HSync +VSync
Modeline "1280x1024-90" 172.7999 1280 1376 1520 1760 1024 1036 1039 1090
+HSync +VSync
Modeline "1280x1024-100" 192.0000 1280 1376 1520 1760 1024 1030 1033 1090
+HSync +VSync
Modeline "1280x1024-60" 108.0000 1280 1328 1440 1688 1024 1025 1028 1066
-HSync -VSync

I tried out a few more modeline configurations that I calculated using the
online tool provided at
http://xtiming.sourceforge.net/cgi-bin/xtiming.pl

Inspite of these, the flickering still exists.

Any pointer to the solution of the above problem ?


With best regards
Pratish Ganguly
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