This machine is a HP z800 with a 780 card in it.
distribution kubuntu 12.04
[ 359.800] (EE) NVIDIA(GPU-0): EVO Push buffer channel allocation failed [ 359.806] (EE) NVIDIA(GPU-0): Failed to allocate EVO core DMA push buffer [ 369.806] (WW) NVIDIA(GPU-0): Timed out detecting DP displays on DP-1
I’ll attach the bug report.
I had the same problem with 343.13
nvidia-bug-report.log.gz (231 KB)