For debian jessie if you install the most bpo kernel (backports.debian.org) you should be most of the way there.
Other than that, the significant packages are likely to be mesa and libdrm, although you may not need to
update these (I have steam running on a partially upgraded wheezy install, so jessie should present no
real obstacles)
I want to get my onboard HD4600 graphics working to try my Steam games and install XBMC or Kodi.
I don't see the new drivers available for plain Debian, so if I download the source code drivers, how would I install them?
Thank you in advance for any assistance you can provide.
Len