Comment 8 for bug 994306

And it happened again:

[11770.665608] [drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[12129.622648] CPU0: Core temperature above threshold, cpu clock throttled (total events = 1376394)
[12129.623135] CPU0: Core temperature/speed normal
[12134.446023] CPU1: Core temperature above threshold, cpu clock throttled (total events = 1276045)
[12134.446509] CPU1: Core temperature/speed normal
[12433.815937] [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 0)
[31587.820638] [drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[32918.816323] [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 0)
[33085.283749] [drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[34843.152021] eth1: no IPv6 routers present
[37952.814364] [drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 0)
[38158.392129] [drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[38286.981989] [drm] nouveau 0000:01:00.0: fail post-validate sync
[38286.981994] [drm] nouveau 0000:01:00.0: validate vram_list
[38286.982022] [drm] nouveau 0000:01:00.0: validate: -16
[38287.039173] [drm] nouveau 0000:01:00.0: PFIFO_DMA_PUSHER - Ch 1 Get 0x000243a4 Put 0x000193d4 State 0x80022054 (err: INVALID_CMD) Push 0x00000000