Currently Being ModeratedFeb 20, 2013 4:34 AM (in response to lordloh)
Maybe you are waiting for the Linux community to improve support for the HD4000 GPU. Intel has already confessed that there are driver issues (on the OS X side) for this GPU, and it is quite possible that Ubuntu 12.10 informs you that it has an unknown GPU.
Read this post. It will suggest that Ubuntu 13.04 will come with better GPU support for the HD4000. Or try Fedora 18, which in my experience, boots almost twice as fast as Ubuntu 12.10, and has a more aggressive update schedule between releases. In the meanwhile, get to know how to use xrandr.
Currently Being ModeratedFeb 20, 2013 11:52 AM (in response to VikingOSX)
I do not see an Unknown GPU error. If it were a HD4000 problem, Would not I see this on every monitor that I connect to? But no. I see this only one one of the monitors that I connect to. I was plannong to trying out a Fedora Live. I'll repot what I find.
Currently Being ModeratedFeb 20, 2013 4:29 PM (in response to lordloh)
The unknown GPU is not an error, it is a status in the Ubuntu 12.10 System Settings > Details > Overview panel. It may or may not be present on your hardware.
The xrandr command-line utility helped me add custom display support to a Ubuntu installation a couple of years ago. The following man pages will help: xrandr(1), gtf(1), cvt(1). If you Google "How to use Xrandr," this will return examples, including multi-display setup. You will need your monitor specs for vert and horiz. frequencies and resolutions.
Currently Being ModeratedFeb 21, 2013 6:18 PM (in response to VikingOSX)
Fedora displayed low color depth on both monitors. System Settings > Details > Overview panel showed the GPU as "Intel Ivy Bridge". Xrandr is not going to solve my problem as it does not change colro depth and I am not using dual monitors. I am using one at a time and seeing different performance on them.
One monitor working perfectly on mint is getting me confused whether it is a harware issue or an X.org issue.