This is an update about the NV-drivers issue, and a new driver issue noticed in the
MS driver (not new issue, but uncovered issue due to new game.
As I mentioned before, I have 1 screen that's my "main screen" (a Dell 2560x1600 ~30"), but it is a "screen", not a multi-channel, theater-type audio output device. My 2nd screen is on the "back" of my Onkyo TX-NR838, 7.1 Home theater system. The "2nd screen is 1920x1080, but is a 55" wall mounted unit -- also not having much in the way of sound output (maybe small stereo speakers built-in).
So the HDMI signal from my computer goes into the Onkyo where the audio is split off
to the theater system that does 7.1 decoding and video that goes out the back in a pass-through mode to the screen.
When I use my computer (and am not watching video), I use the Dell for display, and the Onkyo for sound. The onkyo works great for stereo fidelity AND 7.1 sources -- with the speakers set around the room balanced to someone sitting in front of the Dell. Recently
got a new game that was a bit braindead. It only wanted to put sound out to the same
device as the video went to -- I.e. my split system didn't work (a first).
I remembered that Nvidia's drivers had probs with using sound w/o associated video being on -- and wondered if it would "behave" differently -- installed the latest drivers, and found that the Nvidia drivers fixed (or worked around) the problem of the game not liking a split video/sound setup. I also found that NV has fixed the issue with needing to keep the monitor w/the sound system turned on, as well as presenting
the HDMI connection as whatever the output device says (7.1) -- vs. the old driver always reported 2 channel output as it ignored the decoding ability of the output device (whereas the MS driver had always reported the # channels of the output device correctly).
So Nvidia has stepped up and fixed some of their more onerous problems (that their support people said couldn't be fixed -- because the problem was in HW... um... right!).
And works w/the obscure game title (Blades of Time) that doesn't seem to like the video and audio going to two separate outputs...
I'm sure I'll find some cases where the MS drivers works better than the NV driver, but NV certainly, in only 5-6 years, caught up to the MS drivers. It's doubtful that MS will upgrade their drivers, since they don't seem to be aiming for the high end, 3D-accel-using desktops in their newer OS's...(*sigh*)...