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Amiga computer related discussion => Amiga Software Issues and Discussion => Topic started by: mchaggis on June 07, 2010, 12:20:23 PM

Title: Screen Corruption After OS4.1 Update 2
Post by: mchaggis on June 07, 2010, 12:20:23 PM

Hi All,

After installing OS4.1 Update 2, when I drag windows around I get random corruption on the screen.

Once I let the window go, the entire screen goes black and immediately returns with everything painted normally.

This is a fresh OS4.1 Update 1 with Update 2 applied on top, then the various AmiUpdate's applied. Noting that most of those needed to be done manually. Using SFS.

Is anyone else seeing this?

Thanks.

Title: Re: Screen Corruption After OS4.1 Update 2
Post by: xeron on June 07, 2010, 12:23:09 PM

Weird. I have never seen anything like this.

What system and graphics card are you using?

Title: Re: Screen Corruption After OS4.1 Update 2
Post by: mchaggis on June 07, 2010, 12:27:00 PM

Quote from: xeron;563254

Weird. I have never seen anything like this.

What system and graphics card are you using?

SAM440 with the onboard Radeon M9 64MB graphics.

Title: Re: Screen Corruption After OS4.1 Update 2
Post by: mchaggis on June 07, 2010, 12:30:51 PM

And it's not all windows either, small windows, you can shake em all over the available workbench, larger ones like OWB cause the problem immediately.

Title: Re: Screen Corruption After OS4.1 Update 2
Post by: Karlos on June 07, 2010, 12:33:34 PM

How does it behave in the following configurations?

1) Compositing disabled
2) Compositing enabled, optimise for memory usage
3) Compositing enabled, optimise for speed

Title: Re: Screen Corruption After OS4.1 Update 2
Post by: mchaggis on June 07, 2010, 01:00:56 PM

Quote from: Karlos;563259

How does it behave in the following configurations?

1) Compositing disabled
2) Compositing enabled, optimise for memory usage
3) Compositing enabled, optimise for speed

With Preferences -> GUI -> Effects

- Compositing Effects disabled = Corruption Gone!
- Compositing Effects enabled (Optimised For Video Memory) = Screen Corruption.
- Compositing Effects enabled (Optimised For Performance) = Screen Corruption.

Thanks for the pointers of where to look, I suppose this means I'll run with Compositing Effects disabled for  the time being. System seems a bit sluggish on redraw now, is that possible or just my imagination?

Title: Re: Screen Corruption After OS4.1 Update 2
Post by: Karlos on June 07, 2010, 01:09:29 PM

Well, without compositing, you are back to old style layers and clipping instead. Working out which bits to redraw and clipping as appropriate introduces some overhead.