G3 iMac FIX xorg.conf for Jaunty Low Graphics Mode

[imacQ]

After days of searching regarding the G3 iMac and "crappy graphics," I found most of this information on the freegeek wiki.

Back up it up!
cp /etc/X11/xorg.conf /etc/X11/xorg.backup.conf
Use nano for editing
sudo nano /etc/X11/xorg.conf

Delete the contents of the file, and replace it with the one below.

# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# Note that some configuration settings that could be done previously
# in this file, now are automatically configured by the server and settings
# here are ignored.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
# sudo dpkg-reconfigure -phigh xserver-xorg

Section "Device"
Identifier "Configured Video Device"
BusID "PCI:6:3:0"
Option "SWcursor" "true"
Option "ForcePCIMode" "true"
EndSection

Section "Monitor"
Identifier "Configured Monitor"
HorizSync 58-62
VertRefresh 75-117
EndSection

Section "Screen"
Identifier "Default Screen"
Monitor "Configured Monitor"
Device "Configured Video Device"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1024x768"
EndSubSection
EndSection

If you did use nano, hit Control o and Return to write the file, and then Control x and Return to exit.

You most likely needed to use "ofonly=video" to install from the alternate Jaunty cd. It is now part of your /etc/yaboot.conf file; you need to remove "ofonly=video" from the vmlinux image and vmlinux.old image. It is after append=.
Here's the end of my current yaboot.conf.

image=/boot/vmlinux
label=Linux
read-only
initrd=/boot/initrd.img
append="quiet nosplash"

image=/boot/vmlinux.old
label=old
read-only
initrd=/boot/initrd.img.old
append="quiet nosplash"

Save and exit the file: Control o, Return and Control x, Return
Now run the following commands

sudo update-initramfs -u
sudo ybin -v

Reboot and hopefully you're good to go!

[Genyns]

Thank you very much you helped me a lot!:popcorn: My iMac CRT G3 now has nice graphics on xubuntu 9.04

[flinckorama]

This worked like charm on my old blue imac

many thanks!

[swansong]

I followed your directions, copying and pasting along the way and it worked like a charm. I'm running 10.4 LTS on an old iMac G3 DV. Thanks for posting your solution.