This is all from a Linux nub: I had YDL 5 installed, hated it. Then I installed Ubuntu 7.10 and loved it. However, the overscan problems annoyed me to no end, and fbset is a hassle to get installed and modify resolution. Then, I realized there was an update available (UBUNTU 8.04: UPGRADE NOW!!1), and clicked the big shiny upgrade button. It went overnight, came back on in the morning. I then booted up the PS3, ready to experience Ubuntu 8.04... and it freezes. Every single time I boot up, it froze. I did a bit of research, and it turns out Ubuntu 8.04 is not compatible with PS3.
Well gee, thanks for offering the god damned upgrade then, only to brick my Linux partition.
I have now formatted my PS3. I may install Ubuntu sometime later down the road, but only when changing resolutions and fixing overscan through software is easily possible.