Before we can build mythtv on ubuntu we has to prepare the enviroment with:

• Update sources.list
• Get mythtv and mythplugins required programs and libraries
• Get linux-headers (for dvb support)
• Get subversion

Update your sources.list

Uncomment the lines with universe repositories (lines 17 and 18, 32 and 33) by removing the initial "#" mark. Make sure that the lines (17, 18, 32, 33) has the keyword "multiverse" at the end; if not, put it there. You can download my version of sources.list.

After upgrading ubunto to dapper from breezy mythtv get some compiler errors. You must reinstall mesa-common-dev packages to get it to work again.
Errors: