I tested fglrx-installer-experimental-13 (2:13.101-0ubuntu0.0.2) and fglrx-pxpress with and without jockey on my Dell Inspiron N4110 and they worked without problems. Thanks to PowerXpress I can use the discrete card.
I also tested nvidia-319 and nvidia-319-updates (one at a time) together with nvidia-prime (with and without jockey) on my Lenovo L480S. It all works correctly with Hybrid graphics.
I haven't experienced any regressions with systems with a single GPU (e.g. my Inspiron 1122). All drivers show up and install correctly. Neither nvidia-prime nor fglrx-pxpress is installed in this case (as expected).
Also, using stacks older than Raring's (lts-raring), no drivers show up on systems with hybrid graphics, as expected.
I tested fglrx-installer -experimental- 13 (2:13.101- 0ubuntu0. 0.2) and fglrx-pxpress with and without jockey on my Dell Inspiron N4110 and they worked without problems. Thanks to PowerXpress I can use the discrete card.
I also tested nvidia-319 and nvidia-319-updates (one at a time) together with nvidia-prime (with and without jockey) on my Lenovo L480S. It all works correctly with Hybrid graphics.
I haven't experienced any regressions with systems with a single GPU (e.g. my Inspiron 1122). All drivers show up and install correctly. Neither nvidia-prime nor fglrx-pxpress is installed in this case (as expected).
Also, using stacks older than Raring's (lts-raring), no drivers show up on systems with hybrid graphics, as expected.