Yup, thanks Mark - lowering the screen resolution took away the noise.
Mark Vojkovich wrote:
On Thu, 23 Sep 2004, davidjpenton wrote:
Thanks Mark. I have an ATI All-In-Wonder 7500. It's about 2 years old.
I running XFree86 4.3.0 on Fedora Core 1. My desktop is at 1280x1024.
Does that sound like a problem?
That sounds like a driver bug. I don't know much about ATI drivers and hardware, but if you're running in depth 24, an interesting test might be to see if it goes away in depth 16. Generally, this sort of problem happens if the display hardware can't read the framebuffer reliably due to contention with the graphics hardware. Decreasing the amount of data that needs to be read (moving to depth 16), increasing the bandwidth available (raising memory clocks) both tend to help. But in general that sort of thing should be solveable in the driver by tweaking timings - a task for someone who understands the hardware.
Mark.
Mark Vojkovich wrote:
This is a video ram bandwidth issue. If you have a old or very low end card and are trying to run a very high resolution (for that class of card), it's normal. If not then it's a driver bug of some sort.
Mark.
On Tue, 21 Sep 2004, davidjpenton wrote:
Is it normal for X to generate a lot of visual noise on the screen when, e.g., you drag a vertical scroll bar? My system shows tons of "sparks" to the right of a window if you drag a scroll bar, and in some other cases.
- Dave -
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