Aug 14 20:06:01 michael72-pc kernel: [    1.740507] nvidia: module license 'NVIDIA' taints kernel
Aug 14 20:06:01 michael72-pc kernel: [    1.740511] Disabling lock debugging due to kernel taint
Aug 14 20:06:01 michael72-pc kernel: [    1.744321] nvidia: module verification failed: signature and/or  required key missing - tainting kernel
Aug 14 20:06:01 michael72-pc kernel: [    1.746371] EXT4-fs (sdb1): re-mounted. Opts: errors=remount-ro
Aug 14 20:06:01 michael72-pc kernel: [    1.757128] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=none
Aug 14 20:06:01 michael72-pc kernel: [    1.759601] [drm] Initialized nvidia-drm 0.0.0 20150116 for 0000:01:00.0 on minor 0
Aug 14 20:06:01 michael72-pc kernel: [    1.759609] NVRM: loading NVIDIA UNIX x86_64 Kernel Module  340.76  Thu Jan 22 12:11:08 PST 2015