Comment Mouse works fine, Sandy Bridge HDMI not so much (Score 2, Informative) 326
I installed 8.1 and the first two things I noticed- 1) it reset my icon size to medium, which on my 2560x1440 monitor looks ridiculous and given how they imported all my other settings... why? and 2) the HDMI output of my motherboard stopped working. After installing 8.1, I did some searching and apparently Sandy Bridge was not included in Intel's beta driver development for graphics for 8.1 and there is no known development being done for Sandy Bridge, so if I want to continue using my computer to communicate via the HDMI port to my television I need to upgrade to an Ivy Bridge, drive my 'small' 2nd monitor off of VGA (no fscking way, but supposedly analog ports off of S.B. are working fine- I haven't tested it), or upgrade my video card to one that can drive a 3rd (non-DP) monitor. Yes, I could also switch my DVI 2nd monitor to the mobo and put my TV into the HDMI on my video card, but that causes some really strange window relocation issues when waking out of sleep- I have tried that in the past.
For people using only on-board video via HDMI to their sole monitor and without a desire to upgrade S.B. or buy a new computer, it must be enraging. I guess I am lucky, upgrading this motherboard (ASRock Extreme4 Gen3) to Ivy Bridge was something I was planning to do this month, anyway. For Intel not to include Sandy Bridge, a chip only about 2 years old, in their driver development for 8.1 is pretty lame. A Microsoft suggestion was to reinstall the Intel video drivers with compatibility settings for Win 7 or 8, but that didn't work for me.