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[Dragster]

Hi I don't know if anybody has reported this before, I did not find any thread covering this (on BvisionPPC.. I know there are threads regarding video problems with mediators/voodoo).

I'm running OS4 classic on my Amiga 1200 with BlizzardPPC and BVision. My problem is that everytime I use a screenmode higher than 1600x1200 (16 bit), some horizontal and white lines appear randomly on the screen, like little sparks... they appear too when I move a window, around window edges... I guess this is a software driver problem, 'cause higher screen modes like 1792x1344 work just perfect on OS 3.x. I even had a lockup while browsing WB menus while my WB was set in this screenmode and the mentioned lines were appearing in OS4.

The problem shows too but more slightly in 1280x1024x24 (yes, only in 24 bit). I'm using the new method to create screenmodes (tooltypes in the monitor file), I have't created any screenmode usinig p96mode. Here's how my monitor's tooltypes look:

VSYNCMIN=50
VSYNCMAX=160
HSYNCMIN=31500
HSYNCMAX=95000
MODE=640x400@85
MODE=640x480@85
MODE=800x600@56
MODE=1024x768@56
MODE=1280x960@56
MODE=1280x1024@56
MODE=1600x1200@56
MODE=1792x1344@60
MODE=1856x1392@60
MODE=1920x1440@56
(FAKENATIVEMODES=Yes)
INTERRUPT=No

So, the problem shows up on:
1792x1344x16
1856x1392x16
1920x1440x16
and 1280x1024x24 (it shows as 1280x1024x32 in the screenmode list). There is something weird with THIS mode, it shows up in the screenmode list at first boot, but after a softreset, it doesn't!!).

The problem is more visible while the WB is on any of these screenmodes and you drag a window around, you will see the lines around the edges. And it's even more visible if you have black blackground.

Anyway, I'm pretty sure this is a problem in p96 video drivers in OS4, because I have similar screenmodes under CGFX in OS3.9 without any problem at all.

Comments/suggestions?

Thanks!

D.

[Dragster]

Nobody??

:-(

[Dragster]

Another try...

[StormLord]

I will try to test my OS4 with blizzppc/bvision in the evening and I will let you know..

[Dragster]

@Stormlord

thanks!

I'll wait for your results!

[AmigaPapst]

Do you have the problem with INTERRUPT=Yes ?

[Dragster]

@Amigapapst

Yes, it happens too.. and setting interrupt = yes slows down window moving and such... :-(

Thanks

D.

[bigmac]

Hi! my setup is very similar except for (FAKENATIVEMODES=NO)
I,m using P96 and have had no probs, I wonder what it is?
cheers

[Dragster]

@Bigmac

Have you tried using such high screen modes? 'cause the problem does not happen with 1600x1200 or less...

cheers

D.

[bigmac]

Hi! just tried higher resolutions and I,m having probs methinks it is software related I,ll play around with it a bit more and try and narrow it down, I think it may be caused by a bug in os4 in the way it trys to handle graphics at higher resolutions it sure is an interesting little problem

ps The card had no probs at any resolution when I had my miggy running os3.9 hence the reason for suspecting os4c anyone out there know exactly how os4c handles graphics or video mem in relation to higher resolutions???
cheers

[actung_bab]

hi yes l have bvsion blizzard ppc setup
and yes get grphics coruption seems to worse in the lower screen modes. l only run mine in lower modes compared to yours. at the moment l cant get os4 installed so l have to get back to you. :-o