I tried to purge nvidia proprietary drivers and boot with nouveau and
got exactly the same issue. The only difference is my screen is just
black.

Same errors in dmesg:
fifo: SCHED_ERROR 08 []

I use Nvidia GTX 970.

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https://bugs.launchpad.net/bugs/1613158

Title:
  Booting with Nvidia GTX 970 hangs with an orange screen in kernels 4.7
  and 4.8rc1 (but works with 4.4.0)

Status in linux package in Ubuntu:
  Invalid

Bug description:
  Booting with Nvidia GTX 970 hangs with an orange screen in kernels 4.7
  and 4.8rc1 (but works with 4.4.0).

  I've tried:
    * Plain yakkety 4.4.0-34-generic
    * Mainline kernel 4.7
    * Mainline kernel 4.8rc1
  and only the first one works. Kernels 4.7 and 4.8rc1 freeze with a bright 
orange screen.

  Best I can tell, the frozen orange screen coincides with kernel log
  messages:

  Aug 15 12:24:23 x51 kernel: [    1.761197] fb: switching to nouveaufb from 
simple
  Aug 15 12:24:23 x51 kernel: [    1.761210] Console: switching to colour dummy 
device 80x25
  ...
  Aug 15 12:24:26 x51 kernel: [   11.896160] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.897225] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.898292] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.899358] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.900423] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.901489] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.902555] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.903621] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.904686] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.905753] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.906818] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.907883] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.908949] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.910014] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.911079] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.912145] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  Aug 15 12:24:26 x51 kernel: [   11.913210] nouveau 0000:01:00.0: fifo: 
SCHED_ERROR 08 []
  ...
  ...

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