[Openchrome-users] Problem with Ubuntu 7.10 and K8M890

[Joseph Shraibman]

I recently had to install a new motherboard.  The graphics worked fine 
with the old one (a via, but I'm not sure which one) but did not with the 
new one.  Ubuntu refused to use the via driver and would only use the 
vesa driver at a max resolution of 800x600.  I downloaded the openchrome 
drivers and installed them, and was able to start gdm with them.  The 
problem is that at any resolution above 1280x800 I get horrible 
flickering (and at 1280x800 the bottom of my screen is getting cut off). 
My monitor is a SyncMaster 712n.  I selected this from the 
graphical video configure tool, and this was put in my xorg.conf:

Section "Monitor"
         Identifier      "SyncMaster"
         Vendorname      "Samsung"
         Modelname       "Samsung SyncMaster 711N/712N"
         Horizsync       30-81
         Vertrefresh     56-85
   modeline  "640x480 at 60" 25.2 640 656 752 800 480 490 492 525 -vsync 
-hsync
   modeline  "640x480 at 72" 31.5 640 664 704 832 480 489 491 520 -vsync 
-hsync
   modeline  "640x480 at 75" 31.5 640 656 720 840 480 481 484 500 -vsync 
-hsync
   modeline  "640x480 at 85" 36.0 640 696 752 832 480 481 484 509 -vsync 
-hsync
   modeline  "800x600 at 56" 36.0 800 824 896 1024 600 601 603 625 +hsync 
+vsync
   modeline  "800x600 at 72" 50.0 800 856 976 1040 600 637 643 666 +hsync 
+vsync
   modeline  "800x600 at 75" 49.5 800 816 896 1056 600 601 604 625 +hsync 
+vsync
   modeline  "800x600 at 85" 56.3 800 832 896 1048 600 601 604 631 +hsync 
+vsync
   modeline  "800x600 at 60" 40.0 800 840 968 1056 600 601 605 628 +hsync 
+vsync
   modeline  "832x624 at 75" 57.284 832 864 928 1152 624 625 628 667 -vsync 
-hsync
   modeline  "1024x768 at 85" 94.5 1024 1072 1168 1376 768 769 772 808 +hsync 
+vsync
   modeline  "1024x768 at 75" 78.8 1024 1040 1136 1312 768 769 772 800 +hsync 
+vsync
   modeline  "1024x768 at 70" 75.0 1024 1048 1184 1328 768 771 777 806 -vsync 
-hsync
   modeline  "1024x768 at 60" 65.0 1024 1048 1184 1344 768 771 777 806 -vsync 
-hsync
   modeline  "1152x864 at 75" 108.0 1152 1216 1344 1600 864 865 868 900 +hsync 
+vsync
  modeline  "1024x768 at 75" 78.8 1024 1040 1136 1312 768 769 772 800 +hsync 
+vsync
   modeline  "1024x768 at 70" 75.0 1024 1048 1184 1328 768 771 777 806 -vsync 
-hsync
   modeline  "1024x768 at 60" 65.0 1024 1048 1184 1344 768 771 777 806 -vsync 
-hsync
   modeline  "1152x864 at 75" 108.0 1152 1216 1344 1600 864 865 868 900 +hsync 
+vsync
   modeline  "1280x1024 at 75" 135.0 1280 1296 1440 1688 1024 1025 1028 1066 
+hsync +vsync
   modeline  "1280x960 at 60" 102.1 1280 1360 1496 1712 960 961 964 994 -hsync 
+vsync
   modeline  "1280x1024 at 60" 108.0 1280 1328 1440 1688 1024 1025 1028 1066 
+hsync +vsync
   modeline  "1280x960 at 75" 129.86 1280 1368 1504 1728 960 961 964 1002 
-hsync +vsync
   modeline  "1400x1050 at 60" 122.61 1400 1488 1640 1880 1050 1051 1054 1087 
-hsync +vsync
   modeline  "1600x1200 at 65" 175.5 1600 1664 1856 2160 1200 1201 1204 1250 
+hsync +vsync
   modeline  "1600x1200 at 60" 162.0 1600 1664 1856 2160 1200 1201 1204 1250 
+hsync +vsync
         Gamma   1.0
EndSection

I downloaded the manual from 
http://org.downloadcenter.samsung.com/downloadfile/ContentsFile.aspx?CDSite=us&CttFileID=167561&CDCttType=UM&ModelType=C&ModelName=712N&VPath=UM/200504/20050413231145750_BN59-00420J-04Eng.pdf 
(see page 60) but I'm not sure how I translate what is in there to my 
xorg.conf.  I 
changed the Vertrefresh to  56-75 and commented out the modelines above 
@60 (since the manual says 60mhz is prefered ) but it still doesn't work.

http://www.tupari.net/unichrome/2007-nov-28/xorg.conf.20011231190431 is 
the xorg.conf from my previous motherboard.
http://www.tupari.net/unichrome/2007-nov-28/xorg.conf~ is the xorg.conf 
after the section for the SyncMaster 712n was added but before I changed 
it.  xorg.conf in that directory is the current one I am using, and 
Xorg.0.log is the current xorg log using that as my config file.