Picture bobbing 1 rasterline up and down

Photon · 14 October 2008, 00:41

I've had this through all(?) WinUAE versions, misc PCs including this laptop, configurations usually re-created from scratch with each new WinUAE version.

It's independent of picture mode (full screen, windowed, hires, null filter, etc), so it could be an emu problem of the Amiga. I have a full ECS A500+ config with chip slow and fast ram. Too tired to post my config Toni, sorry. But maybe you've heard of this before? (also too tired to search the forums, slap me with a fish).

But I've had it working, so should be the config? Wouldn't know how to get rid of it though.

Any advice appreciated.

I'm running WinUAE 1.5.2 (latest stable).

Photon · 14 October 2008, 22:29

Bootlog and config files uploaded to the Zone.

Toni Wilen · 14 October 2008, 22:44

Never heard, never seen.

EDIT: Use built-in video recording feature when it happens. Do you see the problem in recorded video?

DamienD · 14 October 2008, 23:30

Hey Photon,

Do you mean something like the attached?

I get this very rarely and mainly if I'm using an old version of WinUAE like v1.0.0... Standard A500 settings for the configuration...

Photon · 14 October 2008, 23:58

Yes DamienD. Although mine seemed to do that "above" the CLI window, causing the whole "screen" to bob. Yours looks very reminiscent of something I got quite a long time ago.

Can't seem to reproduce it now, which is a good thing I guess. Will try to catch it if I get it again

Maren · 10 September 2009, 09:36

Quote:

Originally Posted by DamienD

Hey Photon,

Do you mean something like the attached?

I get this very rarely and mainly if I'm using an old version of WinUAE like v1.0.0... Standard A500 settings for the configuration...

Same here, very, very rare, but I can only confirm it for newer versions, and it's practically impossible to reproduce on demand, even with savestates.

Leffmann · 10 September 2009, 10:51

I got this bobbing picture bug yesterday as well with latest WinUAE. I've seen it in some prior version as well but can't recall which one, and I can't reproduce it.

I've seen some another rare bug in fullscreen mode related to the D3D code most likely, where the background color outside the emulated display has different colors through the swap chain, and you get a faint flashing effect on the screen.

BTW will the OpenGL mode be back in the next stable release?

Toni Wilen · 10 September 2009, 11:17

"very rarely" is the problem.

Quote:

BTW will the OpenGL mode be back in the next stable release?

No, reason has been explained in changelogs.

Maren · 10 September 2009, 11:56

I've had these lying around my hard drive for a while. IIRC, the giana sisters screenie was taken with 1.53, and the later (neural assault demo) with a 1.62 beta. Not useful for much, other than to confirm it happens in lowres and lowres+overscan modes alike on seemingly arbitrary lines.

pmc · 10 September 2009, 13:12

I've had that 'one raster line picture split' behaviour lots and lots of times with WinUAE in all versions I've used - although I must qualify that by saying that I haven't tried the latest WinUAE beta.

Normally I just put up with it until I exit / restart WinUAE which clears the problem.

When the problem has occurred I notice that whenever I use keyboard or mouse input the effect shows. What I mean is, the problem has occurred but while I leave WinUAE alone the display is stable. However, when I then type or move the mouse the screen shows a one rasterline split and 'bobs' in time to the keypresses / mouse movements.

If I get it again soon I'll do a savestate if it helps...?

Toni Wilen · 10 September 2009, 13:47

Quote:

Originally Posted by pmc

When the problem has occurred I notice that whenever I use keyboard or mouse input the effect shows. What I mean is, the problem has occurred but while I leave WinUAE alone the display is stable. However, when I then type or move the mouse the screen shows a one rasterline split and 'bobs' in time to the keypresses / mouse movements.

Thanks, this 100% confirms it is some kind of memory corruption/buffer overflow, which also explains why it can't be duplicated with statefiles.

Quote:

If I get it again soon I'll do a savestate if it helps...?

Problem is that it disappears when you load the state.

Photon · 10 September 2009, 22:28

Now you see I don't make things up Toni

(Well you probably didn't think that, but I also had trouble getting a screenshot, and I also related it to keyb or mouse input (as I wrote))

pmc · 27 November 2009, 12:14

Just in case this helps in any further way with this one Toni I just noticed something else.

I had the bug again, screen tearing on mouse movements. I tried both F12 and clicking reset and F12 and clicking restart and neither cleared the problem.

I had to actually exit WinUAE and then run it again for the screen tear to go away.

andreas · 27 November 2009, 17:00

Quote:

Originally Posted by Toni Wilen

Problem is that it disappears when you load the state.

Yeah, it almost sounds as if the save-restore of the save state would "repair" the problem. So maybe a diff of the memory contents in the save-state file and those of the "live" WinUAE could help in tracking down the bugger...

Toni Wilen · 05 December 2009, 15:59

This is finally fixed in 2.0b25.

pmc · 05 December 2009, 16:08

Superb work Toni - nice one.

Photon · 06 December 2009, 16:55

14 October 2008, 00:41	#1
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602	Picture bobbing 1 rasterline up and down I've had this through all(?) WinUAE versions, misc PCs including this laptop, configurations usually re-created from scratch with each new WinUAE version. It's independent of picture mode (full screen, windowed, hires, null filter, etc), so it could be an emu problem of the Amiga. I have a full ECS A500+ config with chip slow and fast ram. Too tired to post my config Toni, sorry. But maybe you've heard of this before? (also too tired to search the forums, slap me with a fish). But I've had it working, so should be the config? Wouldn't know how to get rid of it though. Any advice appreciated. I'm running WinUAE 1.5.2 (latest stable).

14 October 2008, 22:44	#3
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	Never heard, never seen. EDIT: Use built-in video recording feature when it happens. Do you see the problem in recorded video? Last edited by Toni Wilen; 14 October 2008 at 23:11.

14 October 2008, 23:30	#4
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Hey Photon, Do you mean something like the attached? I get this very rarely and mainly if I'm using an old version of WinUAE like v1.0.0... Standard A500 settings for the configuration... Last edited by DamienD; 27 July 2016 at 14:46.

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14 October 2008, 22:29	#2
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602	Bootlog and config files uploaded to the Zone.

14 October 2008, 23:58	#5
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602	Yes DamienD. Although mine seemed to do that "above" the CLI window, causing the whole "screen" to bob. Yours looks very reminiscent of something I got quite a long time ago. Can't seem to reproduce it now, which is a good thing I guess. Will try to catch it if I get it again

10 September 2009, 10:51	#7
Leffmann Join Date: Jul 2008 Location: Sweden Posts: 2,269	I got this bobbing picture bug yesterday as well with latest WinUAE. I've seen it in some prior version as well but can't recall which one, and I can't reproduce it. I've seen some another rare bug in fullscreen mode related to the D3D code most likely, where the background color outside the emulated display has different colors through the swap chain, and you get a faint flashing effect on the screen. BTW will the OpenGL mode be back in the next stable release?

10 September 2009, 11:56	#9
Maren Banned Join Date: Jul 2009 Location: * Posts: 567	I've had these lying around my hard drive for a while. IIRC, the giana sisters screenie was taken with 1.53, and the later (neural assault demo) with a 1.62 beta. Not useful for much, other than to confirm it happens in lowres and lowres+overscan modes alike on seemingly arbitrary lines.

10 September 2009, 13:12	#10
pmc gone Join Date: Apr 2007 Location: completely gone Posts: 1,596	I've had that 'one raster line picture split' behaviour lots and lots of times with WinUAE in all versions I've used - although I must qualify that by saying that I haven't tried the latest WinUAE beta. Normally I just put up with it until I exit / restart WinUAE which clears the problem. When the problem has occurred I notice that whenever I use keyboard or mouse input the effect shows. What I mean is, the problem has occurred but while I leave WinUAE alone the display is stable. However, when I then type or move the mouse the screen shows a one rasterline split and 'bobs' in time to the keypresses / mouse movements. If I get it again soon I'll do a savestate if it helps...?

10 September 2009, 22:28	#12
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602	Now you see I don't make things up Toni (Well you probably didn't think that, but I also had trouble getting a screenshot, and I also related it to keyb or mouse input (as I wrote))

27 November 2009, 12:14	#13
pmc gone Join Date: Apr 2007 Location: completely gone Posts: 1,596	Just in case this helps in any further way with this one Toni I just noticed something else. I had the bug again, screen tearing on mouse movements. I tried both F12 and clicking reset and F12 and clicking restart and neither cleared the problem. I had to actually exit WinUAE and then run it again for the screen tear to go away.

05 December 2009, 15:59	#15
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,505	This is finally fixed in 2.0b25.

05 December 2009, 16:08	#16
pmc gone Join Date: Apr 2007 Location: completely gone Posts: 1,596	Superb work Toni - nice one.

06 December 2009, 16:55	#17
Photon Moderator Join Date: Nov 2004 Location: Eksjö / Sweden Posts: 5,602

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