Hi,
I have expirienced the same problems. I have solves the issue setting vesa
as the driver for the graphic card and setting horizontal and vertical
values for monitor. I made some practices with the "rendition" driver but I
was not able to set the proper values for the monitor. The picture was
proper but started form the middle of the screen (mirror effect). I have
enclosed here the critical part of the XFree86Config
Section "Monitor"
Identifier "Mag"
ModelName "Unknown monitor"
HorizSync 30-60
VertRefresh 50-75.0
# --- 1024x768 ---
# 1024x768 @ 60 Hz, 48.4 kHz hsync
# Modeline "1024x768" 65 1024 1032 1176 1344
# 768 771 777 806 -hsync -vsync
# 1024x768 @ 70 Hz, 56.5 kHz hsync
# ModeLine "1024x768" 80.0 1024 1048 1184 1328 768 771 777 806
# 1024x768 @ 75 Hz, 60 kHz hsync
# ModeLine "1024x768" 85.32 1024 1072 1312 1408 768 770 782 808
EndSection
Section "Device"
included unless there is more than one video device
# intalled.
# BusID "PCI:0:10:0"
# VideoRam 256
# Clocks 25.2 28.3
Identifier "Standard VGA"
Driver "vga"
VendorName "Unknown"
BoardName "Unknown"
EndSection
Section "Device"
Section "Device"
#Option "sw_cursor"
# Insert Clocks lines here if appropriate
Identifier "Diamond"
Driver "vesa" #"rendition"
BoardName "Rendition Verite 2x00"
VideoRam 4096
EndSection
Section "Screen"
Identifier "Screen 1"
Device "Diamond"
Monitor "Mag"
DefaultDepth 16
SubSection "Display"
Depth 8
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 16
Modes "1024x768"
EndSubSection
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection
Of cource another modes can be included here, but 24 doesn't work with VESA.
I hop it will help someone (I spent few days to find the solution).
Krzysztof
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