OS4 Classic 1024x768 Issue

Has anyone experienced 1024x768 resolution being outputted as 1280x768 from their Blizzard Vision PPC card in OS4 classic?
The monitor is telling me (using its inbuilt menu) that the display mode is 1280x768 when in fact I selected 1024x768 from the 'ScreenModes' icon under 'Prefs'

Is there a way around this? I'd really like to use 1024x768. I've tried all three options and they all do the same. Oddly, 800x600 resolutions actually output 800x600 like they are suppose to.

Any help would be greatley appreciated!

Cheers

@badgerme

I have the same problem with my A1. 1024x768 is stretched horizontaly into 16:10 mode although the monitor is set up to keep the aspect ratio. 640x480, 800x600 and 1280x1024 all work ok, only 1024x768 has the problem. And real 16:10 modes work ok, too, of course. Only 1024x768 displays stretched.

Bye,
Thomas

@badgerme

I had this pb with Update3 IIRC, when setting 1920x1200 outputed really 1600x1200 on the screen. A pb in the driver, corrected in update4, I suppose ?

@TMTisFree

I hope its fixed in the next update - does anyone know of a work around in the meantime? Is there any config files I can manually edit? 800x600 is a tad too small for web browsing :(

@badgerme

Why don't you use 1280x768 then ? Obviously it is a 16:10 monitor, otherwise it would not know this mode. Add it to your driver's list of supported modes, then use it for Workbench.

Bye,
Thomas

@thomas

Id like to use it on my smaller 15" Dell tft to run alongside my PC instead of using my main PC monitor. The 15" TFT has a maximum native resolution of 1024x768 and 1280x768 doesn't work and comes up with a 'Mode not supported' message on screen.

I'll have to stick with 800x600 for now I guess

@badgerme

Quote:

And if you use 1024x768 the monitor tells you that it is 1280x768 and displays only a part of it ? This problem is different than mine.

Did you enter the correct frequency values for the smaller monitor in your driver's tooltypes ?

Bye,
Thomas

@thomas

Sorry I didn't explain myself very well.
I also have a 20" widescreen 2005fpw dell TFT monitor as well - this is where I found out that the resolution was being displayed at 1280x786 resolution @ 60hz as my 15" tft says "Signal not supported" - which makes sense if its maximum resolution is 1024x768

I've checked the tooltypes and for the CVision and the resolutions are entered correctly (no sign of 1280x768 anywhere)

Is it correct that OS4 uses the CVision driver for the Blizzard Vision? Could that be why im getting this or is the BVision meant to use the CVision driver?

@badgerme

Quote:

I was referring to the H/VSYNCMIN/MAX values. Did you adjust them, too ?

Quote:

Don't know. But if CVision is the only driver in Devs/Monitors and if there is no BVision in Storage/Monitors, then it's probably correct.

Bye,
Thomas

@badgerme

Have you tried changing from 60Hz to 59, 61, 65 or 70Hz or the polarity of the sync signals? Don't know which polarity is the default.

eg:
1024x768@59
1024x768@61
1024x768@65+hsync+vsync
1024x768@70-hsync-vsync
...

@Gazelle

can't say I have - is that likely to be the problem do you think? How do I go about changing those? Is it simply just changed within the tooltypes?

Please see link below for my current ToolTypes for the CVision Monitor:

http://www.badger.me.uk/amiga/1024_768_problem.jpg

Ive tried changing FakeNativeModes from True to False and it makes no difference. I assume if a tooltype is within brackets then its ignored???

@badgerme

Yes, just changing/adding the Tooltypes AND reboot.

Your VSYNCMAX is at 60, so the @70 Mode will not show up until you also change it to 70!

I don't know if your Monitor will support 70Hz, check the technical description first.

@Gazelle

Cheers for the advice! Ive just checked the technical data sheet from Dell for my 1505FP 15" TFT monitor, and it shows that the polarity for the 800x600 are both plus for the hsync and vsync yet they are both negative for 1024x768

Could this be it? Maybe OS4 defaults to plus plus for all resolutions maybe?

Gunna try it when I get home and let you know the results

Heres a link to the technical datasheet

http://support.dell.com/support/edocs/monitors/1505FP/EN/about.htm

@badgerme

Quote:
plus plus is the default, have a look at the ScreenModes.doc file.

@ZeroG

yay! thanks all for your help!

-hsync and -vsync didnt make any difference, but changing it to 75hz (which according to the Dell 1505fp manual has polarity +/+ as defaulted to in OS4) work beautifully!

I'm happy again :)