On Sat, 2007-02-24 at 10:16 +0100, Giuseppe Bilotta wrote:

On 2/24/07, Antonino A. Daplas [off-list ref] wrote:

quoted

On Fri, 2007-02-23 at 14:34 +0100, Giuseppe Bilotta wrote:

quoted

The snowy is constant and abundant, and it seems to be independent of
video size (640 through 1600) and screen occupation (single prompt
line to fullscreen mc session) and usage.

quoted

I presume that X's nv driver or vesafb does not exhibit this problem?

X's nv gives a very clean display, /unless/ I load nvidiafb before: if
I modprobe nvidiafb (it's a module, and it's blacklisted precisely for
this reason), then the screen is very snowy with X's nv too.

Hmm..., I really don't know how to fix this except to look at Xorg's
code and look for a difference.

Keep in mind that setting nvidiafb to totally ignore the EDID (either
by not compiling in EDID support or by using e.g. the ignoreedid patch
I had proposed) the snow effect is extremely reduced,

I did not know that, just scanned the entire thread. Try this patch, it
makes use of fb_ddc_read*() which I believe has extra steps to prevent
display corruption.  It also incorporates Luca's i2c fix.

Tony