I have a new Dell Zino HD using integrated graphics, the ATI Radeon 4250. It's hooked up, with an HDMI cable, to an HDTV, a Panasonic VIERA TC-P42S30, which supports Full HD at 1080p. I'm running Ubuntu 11.04.
When it boots, most of the time, the colors are off. Black is displayed as green. The other major color seems to be pink. Pink and green. Blech. I'll try to attach a picture I took of it. If I access the machine via Remote Desktop, the screen looks normal on my laptop, so I don't think the Zino is deliberately displaying pink & green.
Sometimes when it boots, the colors are the normal Ubuntu 11.04 colors. Sometimes I can fix the problem by using Monitors to switch to 720p and then restore back to 1080p. When I switch inputs on the HDTV, and then switch back to the HDMI input hooked up to the Zino, the colors are back to pink and green.
When I run with the ATI proprietary drivers (fglrx), I don't get this problem, but I get an overscan/underscan problem where the screen is displayed with black borders on top, bottom, left & right. Booting to Windows 7, the ATI Catalyst Control Center (CCC) applet lets me fix this by adjusting the overscan/underscan scaling. This overscan/underscan scaling adjustment isn't available under Ubuntu using the proprietary drivers. Also, under Ubuntu, CCC thinks my HDTV is a Projector.
I'd like to use the open-source Radeon driver, so my preference is to fix the Pink/Green problem. Alternatively, if someone knows how to adjust the fglrx driver to fix the overscan/underscan problem (maybe with a change to /etc/ati/amdpcsdb), I'd be willing to go with that.