I have a old intel o4 machine without graphics card. Still now I'm running Ubuntu 8.04 I would like to install Ubuntu 11.4 version. Would that require graphics card support?
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possible duplicate of How do I know if my video card can run Unity? – jrg Aug 13 '11 at 20:57
3 Answers
By "graphics card" you probably mean "discrete graphics card" as opposed to "integrated graphics card". There is no requirement at all to have discrete one.

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Answer: Depends.
You can run the Classic Ubuntu Session at the very least - you might not be able to run Unity, the new desktop interface. To find out if it can, please take a look at this question - How do I know if my video card can run Unity? - it'll have to answers that you seek.
Although I haven't tried to do the install without a graphics card, I've run several machines where I used the serial port as main terminal. Lately I configure my virtual machines (that use KVM) in such a way that I can use the virtual serial port to connect to them in case of emergency (like a network failure). This works fine.
This question points to some help for headless installs.
I assume here that you're going to use the system as a headless server. Correct? In that case you needn't worry about the Unity interface etc. Or do you want to run desktop applications through SSH? In that case I totally depends on the CPU power and RAM of the machine you're talking about.