Major noob question, I fear...
I'm trying to install an Intel xf86 graphics driver (for an integrated Intel G33 GFx chipset) in 12.04 and come up with the following error:
checking for DRMINTEL... no configure: error: Package requirements (libdrm_intel >= 2.4.29) were not met: No package 'libdrm_intel' found Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you may set the environment variables DRMINTEL_CFLAGS and DRMINTEL_LIBS to avoid the need to call pkg-config. See the pkg-config man page for more details.
Over on "Lunar Linux" I've found reference to the same error (reported under slightly different circumstances) and reference to a different but similar error which are allegedly "solved by recompilation of cairo".
No idea what the latter really means, but I found this on the cairo homepage:
sudo apt-get install libcairo2-dev
Which installed ok, but doesn't solve the problem. So I don't know if that command didn't recompile it, or whether it did, but I have a different problem.
What to do now?