I want to install Ubuntu on my PowerMac G5 but when I do it comes up with the error "Your system is running low graphics mode"
Can someone please help me.
You may need to install the Nvidia drivers, if there are any for your card.
Go to software sources and click on the Additional Drivers tab and see if drivers are available.
Have the same problems with late G5 + geforce 6600. Ubuntu 13.04 stopped at the same point as yours. 12.04 ran in low graphics mode but libreoffice failed to work. Ubuntu 10.04 seems good so far (2 days). Debian looked OK. Fedora no chance and no graphics for openBSD.
No nvidia drivers for powerpc. This is all I know so far.