Worthless debug messages

[B Z]

Ever since I upgraded to the (nonworking) KMS extension for Xorg, I've been getting these messages repeating endlessly in my kernel log.  I've given up on trying to get 3D graphics back into a workable state, but is there some boot-time option or sysctl setting that can be used to disable these messages without making Xorg totally unusable?

[2665] [drm:KMS:pid0:intel_crt_detect] CRT not detected via hotplug
[2665] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:11:VGA-1] status updated from 2 to 2
[2665] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:13:SVIDEO-1] status updated from 2 to 2
[2674] [drm:KMS:pid1774:intel_crtc_cursor_set] 
[2674] [drm:KMS:pid1774:intel_crtc_cursor_set] cursor off
[2675] [drm:KMS:pid0:intel_crt_detect] CRT not detected via hotplug
[2675] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:11:VGA-1] status updated from 2 to 2
[2675] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:13:SVIDEO-1] status updated from 2 to 2
[2685] [drm:KMS:pid0:intel_crt_detect] CRT not detected via hotplug
[2685] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:11:VGA-1] status updated from 2 to 2
[2685] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:13:SVIDEO-1] status updated from 2 to 2
[2695] [drm:KMS:pid0:intel_crt_detect] CRT not detected via hotplug
[2695] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:11:VGA-1] status updated from 2 to 2
[2695] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:13:SVIDEO-1] status updated from 2 to 2
[2705] [drm:KMS:pid0:intel_crt_detect] CRT not detected via hotplug
[2705] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:11:VGA-1] status updated from 2 to 2
[2705] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:13:SVIDEO-1] status updated from 2 to 2
[2715] [drm:KMS:pid0:intel_crt_detect] CRT not detected via hotplug
[2715] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:11:VGA-1] status updated from 2 to 2
[2715] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:13:SVIDEO-1] status updated from 2 to 2
[2725] [drm:KMS:pid0:intel_crt_detect] CRT not detected via hotplug
[2725] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:11:VGA-1] status updated from 2 to 2
[2725] [drm:KMS:pid0:output_poll_execute] [CONNECTOR:13:SVIDEO-1] status updated from 2 to 2