The box is a Dell Dimension 2400 (Celeron 2.4 GhZ). Monitor is a Dell
M991 monitor. Video is Intel 82845 integrated. Video chip uses i810
driver.
Problem: Originally, monitor was shown as Generic. I changed to Dell
M991. After Power Down / Power Up, I had to start from the FC6 DVD,
using linux rescue mode, and then run system-config-display.
The changes made by system-config-display (which does not permit one to
set the Horizontal Frequency Range or Vertical Refresh Rate), did not
seem to get written permanently into /etc/X11/xorg.conf so that they
would survive a power down/power up cycle. The changes did survive a
reboot. The system works fine, once I get X running.
I manually changed the xorg.conf file to show the Dell M991 monitor and
I corrected the Horizontal Frequency Range and put in 85.0 hertz for the
Vertical Refresh rate. There is a line in the file I'm not sure about
(not that I'm sure about all of the others, I'm not!):
Option "dpms"
Trying to boot the box normally, it hangs and sometimes I get an error I
believe is from the monitor "Attention 21K / 0Hz Frequency is out of
range". When it hangs, I cannot CTRL-ALT-DEL or CTRL-ALT-BACKSPACE to
Reboot. I need to manually power the box down and then restart from the FC6 DVD in linux rescue mode.
FC4 worked fine on this box. Any suggestions on how to solve thi s will be greatly appreciated!
Additional information: after booting linux rescue from the FC6 DVD, I chroot /mnt/sysimage then I run system-config-display I do not change any settings, I simply click OK. I get a response that xorg.conf and backup have been written. I exit and reboot and everything is OK until I power down the box and then power it up again.
Here's my /etc/X11/xorg.conf file as it is at this moment:
# Xorg configuration created by system-config-display
Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection
Section "Monitor"
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
### Comment all HorizSync and VertSync values to use DDC:
Identifier "Monitor0"
ModelName "Dell M991"
### Comment all HorizSync and VertSync values to use DDC:
HorizSync 30.0 - 96.0
VertRefresh 85.0 - 85.0
Option "dpms"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "i810"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 16
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768"
EndSubSection
SubSection "Display"
Viewport 0 0
Depth 16
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection
Linear Mode
