Xorg.0.log grows (wihout limit) while monitor in sleep mode

[AZgenie]

Debian Jessie 8.5.0; Xorg 1:7.7+7; kernel 3.16.7 (custom compiled); nvidia driver 367.44; GTX 750Ti graphics card.; startx into TWM.
There are no =EE= flags in the Xorg.0.log resulting from the X-window startup. Whenever the X-window session drops into "sleep" mode, as configured in the xset parameters DPMS enabled, Standby:1800, there are 8 lines of text added to the Xorg.0.log file every 2.9 seconds. It works out to 660K bytes per hour. I would like to turn that "feature" off. The text looks like this:

[ 10603.554] (--) NVIDIA(GPU-0): HP 2009 (DFP-0): connected
[ 10603.554] (--) NVIDIA(GPU-0): HP 2009 (DFP-0): Internal TMDS
[ 10603.554] (--) NVIDIA(GPU-0): HP 2009 (DFP-0): 330.0 MHz maximum pixel clock
[ 10603.554] (--) NVIDIA(GPU-0):
[ 10603.572] (--) NVIDIA(GPU-0): HP 2009 (DFP-0): connected
[ 10603.572] (--) NVIDIA(GPU-0): HP 2009 (DFP-0): Internal TMDS
[ 10603.572] (--) NVIDIA(GPU-0): HP 2009 (DFP-0): 330.0 MHz maximum pixel clock
[ 10603.572] (--) NVIDIA(GPU-0):

A similar block of text is logged if I switch to a virtual console and then back to the active X window session, but only once.
I have tried including "Option ModeDebug false" in the xorg.conf file but there is no change.

I am having trouble with occasional system freezes, which I suspect to be related to the Nvidia driver. The nvidia-debug reporting script tries to include the Xorg.0.log file but after a few days of system operation that file can be over 30 Mbytes, 99% of which is simply repeating those text lines (as above) thousands of times. So, one thing at a time - get this log file under control and be able to give the Nvidia folks a usable debug file.

Open to any ideas.

[Head_on_a_Stick]

Try nouveau

[giaur500]

Nouveau is useless

[debiman]

troubleshooting:

- try a different (stock) kernel
- try nouveau (similar messages in log?)
- try a different wm/power management
- try a different monitor

generally speaking, these don't seem to be errors per se.
maybe nvidia has some options to reduce logging verbosity? kernel modules do have options in general.

[AZgenie]

Trouble was evident with Nvidia driver 367.44; reverted to version 343.22 and the Xorg.log flood stopped. "Split the difference" and moved up to driver 352.41 and there is no Xorg.log flood there either. That driver version seems to be the workaround for me. I am satisified that the Linux kernel and the Xorg packag(es) are not at fault. It was suggested in other "readme" files that invoking startx with the "-verbose 1 -logverbose 1" options might help. It did not. A message to Nvidia.support seems to be in order.

[eor2004]

I am having trouble with occasional system freezes, .

I'm using the native intel video drivers and I have experienced a couple of system freezes too, not only with Debian but with LinuxMint Debian Edition on my secondary PC, doesn't matter if I'm using Cinnamon or MATE, had to do a hard reset, so I think it has something to do either with the kernel or with xorg.