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Description of problem:
After upgrading to kernel-2.6.12-1.1447_FC4, I now see the following messages in my syslog:

Driver for 1-wire Dallas network protocol.
matrox_w1 0000:01:00.0: Matrox G400 GPIO transport layer for 1-wire.
w1_driver w1_bus_master1: No devices present on the wire.
w1_driver w1_bus_master1: No devices present on the wire.
w1_driver w1_bus_master1: No devices present on the wire.
....

Series of the 'w1_driver' messages continue to appear at regular intervals (every minute or so).  To stop them, I can 'rmmod matrox_w1' (as some initial research indicated) and then I see a few messages as below:

Aug 31 19:28:34 localhost kernel: Waiting for w1_bus_master1 to become free: refcnt=2.
Aug 31 19:28:35 localhost kernel: Waiting for w1_bus_master1 to become free: refcnt=1.
Aug 31 19:28:43 localhost last message repeated 8 times


And then they do indeed stop.  I've heard that this module is loaded automatically when a Matrox card is detected (I have a G450).  The question is why and why it generates so many syslog messages.

Version-Release number of selected component (if applicable):
kernel-2.6.12-1.1447_FC4

How reproducible:
Always

Steps to Reproduce:
1. Reboot
2. Watch the syslog
  

Actual Results:  Syslog was spammed every minutes by the above messages.

Expected Results:  The messages should not appear (and, arguably as I don't know it's function, the matrox_w1 module should not be loaded).

Additional info: