this is probably the recently discussed intel driver issues. i've added a build option to use the older driver.
can you try build with INTEL_DRIVER_DATE=2014. jmake sure you clean src/external/mit/xorg/server/drivers/xf86-video-intel or the build likely won't be right. don't forget to upate both src and xsrc.. others who have had recent failures could also try -- and if you're adventurous, testing working systems as well. we will probably decide the default (new or old KMS default) depending on feedback. thanks. .mrg.
