Created attachment 89822 [details] x logs When I boot my optimus laptop with systemd as init system the nouveau driver is unloaded (see xlog). Applying this patch solves the issue: http://anonscm.debian.org/gitweb/?p=pkg-xorg/xserver/xorg-server.git;a=blob;f=debian/patches/config-add-no-removal.patch;h=88a5b6d2dae38bd551eb0b65093cb8d7d69524ab;hb=refs/heads/ubuntu
Can be easily reproduced without rebooting by starting xserver and running "udevadm trigger --action=add" as root, X.org can be spawned in parallel to the udev trigger rule.
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