I am having the same problem but i have nvidia audio and pci driver isnt there i have tried alot of suggestions but mine issuue is alittle different with the graphics card being in my computer. I also have no sound. tried to install realteck but didnt do anything with the nvidia. any suggestions on how to fix this? and when i went also the chipset driver didnt work either. I also went to http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareDescription.jsp?lang=en&cc=US&swItem=vc-876... and it said this wasnt the right one or something.
PCI\VEN_8086&DEV_2994&SUBSYS_2801103C&REV_02
PCI\VEN_8086&DEV_2994&SUBSYS_2801103C
PCI\VEN_8086&DEV_2994&CC_078000
PCI\VEN_8086&DEV_2994&CC_0780