DummyHDA-ALC887/888B --- headphones in Audio 575 11 Posted March 28, 2015 works to hdmi hd 4000 with clover? You've done the recommended settings for your graph ?? ? Framebuffer settings for HD4000 ?? ? please check if you use kext or capri blue for HD4000 ?? Check if there is no injection HDA facilitator in DSDT or SSDT for HD4000. enjoy !!!!