Hi guys, I'm dealing with a similar issue on my Mac G5.
I have this model Mac G5:
http://www.everymac.com/systems/apple/p ... p_pci.htmlA few things I have tried myself:
Got the g5_1.txt file, moved it to /etc/X11/xorg.conf, checked the file to see if it was allright and rebooted.
Got the same issue.
Tried dpkg --configure -a and just to be sure Linux url=mintppc.org
No issues there, but got the same problem blank screen and a blinking light.
Tried to re-install xserver [sudo apt-get install xserver-xorg-video-ati gdm gdm-themes-mintppc]
Still got no screen (no pointer) and a blinking light after reboot.
In fact the only way I can login is to type Linux 1 nomodeset at boot.
If I leave the nomodeset option out I will get nada, nothing but blank screen and blinking light.
The nomodeset option allows me to see CLI

I did get an error tho
Het starten van X-server (grafische omgeving) is mislukt.
Translated in English it's this:
Failed to start the X server (your graphical interface). It is likely that it is not set up correctly. Would you like to view the X server output to diagnose the problem?
<yes> <no>
When I view the output I see two errors
(EE) [drm] KMS not enabled
(EE) No devices detected
How the hell can it not detect a device? As far as I know everything is pluged in.
And I can see the error, so I know my screen is on-line.
I also get a warning
(WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
Entry deleted from font path
Not a major issue I assume.
I'm lost here

going through every thinkable step and still left with a blank screen.
Can any of you help me out, I might have missed something.
Many thanks in advance.