How do I suppress dpms mode setting messages on text console?

[Stephen Powell <zlinuxman@wowway.com>]

I am using Debian wheezy i386 with an Nvidia video card and the default
nouveau driver.  Everytime I switch back and forth between the X console
(tty7) and a text console (such as tty1), tty1 gets spammed with messages
like this:

[drm] nouveau 0000:01:00.0: Setting dpms mode 3 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Output VGA-1 is running on CRTC 0 using output A

I assume that mode 3 is graphics mode (X server) and mode 0 is text mode
(frame buffer simulated text console).

Similar messages occur if I stay in a text console long enough for the
power management feature to turn off the display and then I re-activate the
display again (such as by pressing the Shift key by itself).  Apparently,
when power management kicks in, I get dmps mode 1; and when I re-activate
the console it switches back to dpms mode 0.  I do not get these results
on another computer which uses the Nvidia proprietary driver (nvidia),
nor did I get such results using this computer back when I used
the older free nvidia driver (nv), which has since been dropped from the
distribution.

I consider these messages to be noise messages and I wish to suppress them.
I don't mind if they are written to the kernel log, but I don't ever want to
see them written to the console itself (except maybe during boot).

I tried searching the internet, but I didn't find anything useful.  Is there
a way to suppress these messages without suppressing true error messages?
Maybe there's a module option that I can set in /etc/modprobe.d/local.conf,
or something along those lines?  Any help will be appreciated.

-- 
  .''`.     Stephen Powell    
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