CentOS - Sep 2012 - DRM EDID Error

I'm running the following hardware:

    MSI 890FXA-GD70 motherboard
    With a AMI v1.7 BIOS
    AMD Phenom II X6 (1055T)
    8 GB RAM (2 x 4 GB DIMM)
    nVidia Geforce 7300 (G72) video Card
    ViewSonic VA2431wvm monitor
    Plus


The OS is:

    CentOS release 6.3 (Final)
    2.6.32-279.5.2.el6.centos.plus.x86_64


Actually, on this machine I'm getting the following error during bootup:

    [drm:drm_edid_block_valid} *ERROR* EDID checksum is invalid,
    remainder is (222; 122; 251; but mostly 128)


 From time to time the video locks up and sometimes goes black.  But the 
keyboard and mouse usage can be seen via lights blinking whei I enter 
something on the keyboard.  And I can see what I entered when the 
display returns.

I know the monitor, keyboard, and mouse are not the problem because I 
have 3 machines on a KVM using the same monitor, keyboard, and mouse.  
Could this be my video card going bad? I read another posting where it 
was suggested to add 'Option "IgnoreEDID" "1"' into
the xorg.conf, but
this machine doesn't have a xorg.conf file.

Any information will be helpful.

Gene

On Sunday, September 16, 2012 11:11:01 PM Eugene Poole
wrote:
> I know the monitor, keyboard, and mouse are not the problem because I 
> have 3 machines on a KVM using the same monitor, keyboard, and mouse.  
> Could this be my video card going bad? I read another posting where it 
> was suggested to add 'Option "IgnoreEDID" "1"'
into the xorg.conf, but
> this machine doesn't have a xorg.conf file.
I ran into this sort of issue due to the video cable.  If you're running
with a KVM, you may want to check both the KVM to monitor cable and the video
card to KVM cable.  Also try it straight to the monitor.  All video cables are
not equal.

In the case that I ran into, the cable that came with the monitor worked well; a
third party cable (new, not used, and not a 'cheap' cable) did not work
at all for EDID information (that is, the resolution would not auto-set, and I
couldn't get widescreen resolutions because of it).  The monitor was quite
similar to your ViewSonic, and the video was almost the same exact card.  Once I
went to the monitor's cable, everything worked perfectly.  Note that this
particular cable was the 15 pin analog VGA cable, not a DVI cable.

I'm not sure if it was the nVidia card being finicky, or if it was the
monitor; it takes both to successfully grab the EDID info for auto-resolution.