no selected monitor modes were compatible with the possible modes

on 11-25-15 I logged in 15.10 Wily 1 T Western Digital produced the following note, which I don't understand. Is it meaningful ?
none of the selected modes were compatible with the possible modes:
Trying modes for CRTC 63
CRTC 63: trying mode 1440x900@60Hz with output at 1280x1024@75Hz (pass 0)
CRTC 63: trying mode 1440x900@60Hz with output at 1280x1024@75Hz (pass 1)
Trying modes for CRTC 64
CRTC 64: trying mode 1440x900@60Hz with output at 1280x1024@75Hz (pass 0)
CRTC 64: trying mode 1440x900@60Hz with output at 1280x1024@75Hz (pass 1)
Trying modes for CRTC 65
CRTC 65: trying mode 1440x900@60Hz with output at 1280x1024@75Hz (pass 0)
CRTC 65: trying mode 1440x900@60Hz with output at 1280x1024@75Hz (pass 1)

Is the above meaningful relative to balance of my question? The above was subsequent to an Ubuntu update. And the note below was copied 11-24-15 after the monitor began to flip or had a fluttering blind affect. For all practically looks like OS crashes

Flicker err ? solution to Nvidia bug. screen like Venetian blind being bounced by swift wind. On P5GC-MX, BIOS 0314, 5/27/2007 1510 Wily Ubuntu. A report I can't find says “unable to handle kernel NULL pointer dereference at 000000000000008
using 1510 Wily Ubuntu My 1 Tbit WD in Mirus PC clone runs a newly installed OS great for hours; then screen flips into a fluttering blind affect and for all practically looks like it crashes amid a fluttering Venetian blind. OS can be retrieved if I'm patient but at times I must power off & login. OS does not produce a reportable error/crash description.
What does this bring to mind or what work around could I use to solve this problem?