I have Realtek ALC 1150 that come with my mother board ASRock Z97 extreme6,
I'm running Yosemite public beta 2
I've tried the 2 method Piker-Alpha AppleHDA8series
the script complaining that the kext-dev-mode=1 is not set event though I put it in the boot argument.
The AppleHDA1150 kext was installed into S/L/E but it never loaded may be because it never signed. Boot with either kext-dev-mode=1 set or not have no effect.
My monitor is connected to ASUS R9 270 graphic card via HDMI and there is no sound from it
Right. The kext is not signed, and never will be signed, so you have to use rootless=0 and a proper boot loader with SIP support by the time rootless was taken out.
I have Realtek ALC 1150 that come with my mother board ASRock Z97 extreme6, I'm running Yosemite public beta 2 I've tried the 2 method Piker-Alpha AppleHDA8series