1. This is probably an old question, but I can't get any sound. This is my biggest problem.
Open alsamixer and verify not muted. Check blacklist.local.conf UbuntuFAQ has some info may help.
3. After bootup, the default MintPPC background wallpaper is cut in half, just below the wording, "fast and slick..." The top is fine, the bottom half of the screen is just black. Running programs are fine and show up full screen. I got a couple of .jpgs to work from linux mint collection included, but .png files don't seem to work properly. Some .jpg files don't either. For the time being this is OK, but it seems to also affect half the screen at other times. Sometimes the bottom half of the screen will not refresh. Probably in the driver for the nvidia card (GeForce FX Go5200).
Sounds like this.
5. The cd / dvd tray will not eject when a cd is in the computer. I have to eject it from 'file manager.' But the keyboard eject button works fine until the system detects a cd / dvd is present.
might be this.
Video: Just speculation, but if it worked in 12.04 I would speculate as I think you are. Something in the "non-free" territory like codecs. Maybe firmware?