I fixed the "tiling" issue with the compaq evo n1000v.
I had to specify HorizSync and VertRefresh in my "monitor" definition:
Section "Monitor" Identifier "Monitor0" VendorName "LGP" ModelName "6e54" Option "DPMS" HorizSync 31.5-90.0 VertRefresh 59.0-60.0 EndSection
After I did this, everything was back to normal.
I fixed the "tiling" issue with the compaq evo n1000v.
I had to specify HorizSync and VertRefresh in my "monitor" definition:
Section "Monitor"
Identifier "Monitor0"
VendorName "LGP"
ModelName "6e54"
Option "DPMS"
HorizSync 31.5-90.0
VertRefresh 59.0-60.0
EndSection
After I did this, everything was back to normal.