Don't get me wrong but I love the R128pro 16MB in my G4-Cube. Some software is optimized for that card and runs beautiful with it. I use the original setup with the 15" ADC Monitor and the cube-speakers and black pro keyboard connected to the USB ports of the monitor. Think about that...everything is connected through this R128pro...insane! There are only two things I would love to get fixed...one is the multiboot issue with the SSD (only coldboot works, warmboot leads to a "?" because the machine can't find the bootdrive) and the other thing is that damn 3d-acc in YDL3...it is supposed to work (as shown on the archive.org page) but it does not. So if there is anyone here that uses the "normal" setup and has some experiences in Linux...I would love to hear from you how to fix this.
(I forgot MOS (MorphOS) is working on a cube but the monitor-issue is still not fixed, you have to force the "alternative-mode" to get a picture but every software you start on the desktop still drives the monitor to blackscreen)
My G4-cube is one of the best machines I have. It's a great machine, beautifull and with SSD SILENT!