Relevant part of the error message: /var/tmp/portage/x11-drivers/xf86-video-intel-2.99.917-r2/work/xf86-video-intel-2.99.917/src/uxa/intel_driver.c:645:2: error: too many arguments to function ‘PixmapSyncDirtyHelper’ Reproducible: Always
*** This bug has been marked as a duplicate of bug 572700 ***
Created attachment 423860 [details, diff] xf86-video-intel-2.99.917-xorg-1.18.patch This patch is from http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=2c5063938cc809f624e56efd4673041fa8141e81 and it fixes the problem.