SUMMARY: vertical lines from my cgsix0 frame buffer

From: Christopher L. Barnard (
Date: Tue Dec 05 1995 - 03:50:53 CST

I asked:

> I have a cgsix "GX 8-bit Accelerated Color" frame buffer in a SS2
> running SunOS 4.1.4 that is producing vertical grey lines, one pixel
> wide, one or two pixels apart, all the way across the screen. These
> lines go away when the user goes into X, except they reappear in the
> menus that are displayed when a mouse button is pushed.
> This problem has occurred on the same frame buffer with two different
> monitors in two different CPUs (a SS2 and an IPC), so I'm fairly
> confident that the problem is the frame buffer, not the CPU or the
> monitor.
> Has anyone else had experience with this sort of problem? I didn't
> find anything in the summary archive, but I may have been searching on
> the wrong keywords... If it is fixable, who did you send the fb off
> to? Thanks much.

I got two responses, one of which hit the nail right on the head:

> It looks like one bitmap plane has RAM problems on your frame buffer,
> and it is the one used in text mode and also to display overlayed
> pixmaps in X. You should check and/or replace your frame buffer's RAM,
> or the whole card.

Thanks to eric@BComeau.Hydro.Qc.CA (Eric Boucher).

| Christopher L. Barnard O When I was a boy I was told that |
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