First, gardenlen, well done for getting to this stage. Nerve wracking it can be.
Second, I wouldn't bother with the .NET re-install now that you've got this far. This is nitty gritty between hardware and drivers, IMO. Final lap so to speak.
1/
What is your PC configuration (incl. RAM and processor speed)?
2/
What is jerking on vertical scroll? Everything or a particular game/application? What is the screen resolution setting in this game or application? For example, in normal Windows you may be on 1280 x 1024; in game you may be in 800 x 600.
3/
Is horizontal scroll suffering the same?
Your system is working now and we've just got to tune things up, I hope.
Suspishio
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This isn't a .NET problem. .NET would be used where ATI want to manage connexion back to their update site from their control panel and for any statistics their control software collects. Something like that.
I don't know if this will work on your card as you oresumably have the Catalyst Comntrol Centre (remember the MOM component?). But my son reminds me that a couple of years ago on his AMD based system he had a similar problem which he resolved in the Radeon Control Panal (Advanced). Direct 3D setting VSYNC to OFF. He seems to think that this solved a jerkiness problem in a game and I don't see how this would affect a non-game application using the scroll bar, but you might as well try.
Basically, something is slugging your display. I've been hunting around the ATI support site. Is your monitor and refresh rate correctly set? This link might help.
http://support.ati.com/ics/support/KBAnswer.asp?questionID=18880
There must be no mismatch between monitor and graphics card. The Catalyst Control Centre can be used to match monitor to card. This involves a combination of resolution and refresh rate. You didn't mention your monitor nor its resolution used (what I asked for).
Anyway, stuff to be getting on with.
BTW, this sort of thing can happen with nvidia cards too.
Suspishio
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The Radeon Control panel is usually in the bottom right hand of your task bar; or if you right click on your desktop and select properties, the control panel should appear as an option. You can get all this stuff oput of the ATI documentation.
Suspishio
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Just read your post that crossed over with mine. Go into the Settings option
I've been thinking about this problem. Windows can do all the scrolling in software if there is no assist from the hardware (RX1300Pro). Scrolling will be very slow.
IF that's the case, then your drivers may not be the right ones for your PC. For example, if it's a Compaq PC, it may be that you would need to load the drivers from the Compaq site.
Or, as I said before, your card may be outputting at, say 85Hz refresh rate when the maximum for your screen is, say 75Hz. Did you try the VSYNC thing I suggested earlier?
Surely the problem lies in that sort of logical area like I've listed above!
Suspishio
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In Advanced there should be a tab for the ATI control panel. If that isn't there, then the ATI Radeon software isn't installed or only partially installed, I'd say. Particularly so if you're forced to the default refresh rate which I'll bet is the problem now.
If you've inserted the drivers / setup cd for the RX1300Pro, you should be able to run Setup.Exe and let it install the software.
Suspishio
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Jusrt run Setup.exe from the CD and let it run. Answer OK to everything unless it reports a problem.
Suspishio
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Glad you're sorted. It's rarely easy to diagnose instantly from a distance and all the install shit you have to go through is daunting.
It also took a while to diagnose the fact that Windows was directly driving your monitor instead of the ATI drivers.
Incidentally, 62Hz is pretty poor refresh rate. I'd choose the highest one reported available for your monitor.
Best wishes
Suspishio
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