OS X 10.10.1 Yosemite Video & Audio Driver Issues

I have a Mac Mini (Mid 2010), 2.4 GHz Intel Core 2 Dual, 4 GB memory, Nvidia GeForce 320m 256 MB video card connected to a Panasonic 50" Plasma TV via standard HDMI connection. Until I installed OS X 10.10.1 Yosemite the system was working fine. I now have two major issues:
1. Yosemite can not find the Audio drivers for any of the audio output devices for my Mac Mini (internal speaker, head phone, HDMI, or Optical). If I go to System Preferences > Sound, it tells me "no output devices found". I can go to the Apple>About This Mac and generate a System Report of the Hardware and under Audio find all the audio output devices. If I then restart Yosemite, it will now find all the audio output devices. If I shut the system down cold, it will lose that information and I have to go through the same process again to get Yosemite to find the audio devices.
2. The graphics drivers provided are not optomized for the Nvidia GeForce 320m 256 MB video card. This is a common problem with new Operating Systems from both Apple and Microsoft. Unfortunately, there is no path on the Mac to download the Nvidia Drivers as there is for a PC. The problem manifests itself only Mac Mini in how it builds the graphic display in memory. I can actually watch the driver fill the graphic memory with the pixel representations. This is usually a memory utilization problem and how the driver is using a memory buffer in the 4 GB of main memory versus the 256 MB of memory on the graphics board. There are other manifestations of this type of problem, i.e. pixelation of overlapping windows, edge effects on windows, slow video updating since it has to go through the main memory rather than directly to the memory on the graphics card, etc.
Since Apple has built some very fine computers that last a long time, my laptop and iMac are even older than my Mac Mini, my question is:
When is Apple going to provide the correct optimized hardware drivers for all the systems that Apple says can run OS X 10.10.1 Yosemite????

Apple doesn’t routinely monitor the discussions. These are mostly user to user discussions.
Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.
Feedback
Or you can use your Apple ID to register with this site and go the Apple BugReporter. Supposedly you will get an answer if you submit feedback.
Feedback via Apple Developer

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