Hello all,

I recently bought a new (widescreen) monitor, but I have some problems setting up new screenmodes. The tooltypes of Devs:Monitors/radeon are:

BOARDTYPE=Radeon
CMPLENGTH=6
(BORDERBLANK=Yes)
(BIGSPRITE=Yes)
(SOFTSPRITE=Yes)
IGNOREMASK=Yes
(DISPLAYCHAIN=Yes)
FAKENATIVEMODES=No
VSYNCMIN=56
VSYNCMAX=76
HSYNCMIN=30000
HSYNCMAX=85000
MODE=400x300@60
MODE=1920x1200@60
MODE=1680X1200@60
MODE=960X600@60
MODE=640x480@60
MODE=800x600@60
MODE=1600x1200@60
Mode=640x200@60
INTERRUPT=Yes

"fake native" screenmodes are listed in the workbench screenmode prefs program. Isn't the FAKENATIVEMODES=No supposed to prevent them from being listed?

The 960x600 and 1680x1200 screenmodes are not listed in the workbench screenmode prefs program. Why not?

The 1920x1200 screenmode is listed as 61 Hz instead of 60 Hz in the workbench screenmode prefs program no matter what I do. Normally I wouldn't care about 1 Hz more or less, but the monitor wont display it like this. The manual clearly states that the highest resolutions (1600x1200, 1680x1200 and 1920x1200) only work at 60 Hz. Why is the vscync for this resolution off by 1? It only does this for this resolution.

I bet I could solve all these problems in less than a minute with Picasso96mode, but it is not included with OS4 anymore. I want it back!

Any help is appreciated.


Kind regards,

Dennis

@A3000T

I'm sorry I can't help you out here, but I'm very interested in the answer to this problem, as I'm on the verge of buying myself such a monitor (wow: 1920 × 1200 vs 1440 × 1080: 48% more screen real estate!).

OldFart

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@A3000T

IMHO HSYNCMAX=85000, it's too small for 1920@60,
you must check on yours monitor manual the correct HSYNCMAX value

@pvanni

> IMHO HSYNCMAX=85000, it's too small for 1920@60,

It is not. 1200 lines * 60Hz = 72kHz. The number of dots on a line shouldn't matter. The problem is that the 60 Hz I asked for gets changed to 61 Hz.

> you must check on yours monitor manual the correct HSYNCMAX value

I did check the values for VSYNCMIN, VSYNCMAX, HSYNCMIN and HSYNCMAX. They are correct.

Kind regards,

Dennis

@A3000T

What gfx card are you using?

What is the model of the monitor?

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@A3000T

Quote:

The manual clearly states that the highest resolutions (1600x1200, 1680x1200 and 1920x1200) only work at 60 Hz.

Good monitors accept a frequency range instead of a single frequency.
And IMHO good monitor manuals should describe a range in any case
because I dont see a reason why it should not work at 60.01 Hz...

Quote:

Why is the vscync for this resolution off by 1? It only does this for this resolution.

Rounding error? Why do you think the ScreenMode prefs editor tells the true
frequency when it displays it as an integer, not as a floating point value?
BTW, a good monitor is able to tell you the frequency, it will even pop up an on-screen
error "window" with the out-of-range value displayed in red and blinking.

Quote:

I bet I could solve all these problems in less than a minute with Picasso96mode, but it is not included with OS4 anymore. I want it back!

Nobody stole it. IIRC it is still included on the OS4Final CDs.

What about using 59 Hz?

@A3000T

I am not an expert here but you appear to have three modes listed as XXXX x 1200 and also 2 listed as xxx x 600 all at 60 hz. Surely if the width changes then at least one other factor in the equation should change also.
Just my tuppence worth.

Last edited by Swisso on 02-Dec-2007 at 04:51 PM.

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er....CDTV!

@Severin

Quote:

What gfx card are you using? What is the model of the monitor?

The graphics board is a Radeon7500
The monitor is a Dell2707WFP

Kind regards,

Dennis

@A3000T

ok, looking at the specs of your monitor I suggest you try:

VSYNCMIN=59
VSYNCMAX=75
HSYNCMIN=31500
HSYNCMAX=80000

ALL your min / max settings were out of your monitors range which can cause problems. There are more options for the tooltypes to tweak them a bit more, but I can't remember them off hand as the defaults have always worked for me.

Edit:

You also have several modes listed that your monitor does not support

all you need is these:

MODE=640x480@75
MODE=800X600@75
MODE=1024x768@75
MODE=1152x864@75
MODE=1280x1024@75
MODE=1600x1200@60
MODE=1920x1200@60

Last edited by Severin on 02-Dec-2007 at 06:20 PM.

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Visit the Official OS4 Support Site for more help.

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@TetiSoft

> Good monitors accept a frequency range instead of a single frequency.
> And IMHO good monitor manuals should describe a range in any case
> because I dont see a reason why it should not work at 60.01 Hz...

I agree with you, but the manual says: "Vertical scan range 56 Hz to 76 Hz, exception 1680 x 1200 & 1920 x 1200 at 60 Hz only". So I have to deal with it.

>> I bet I could solve all these problems in less than a minute with
>> Picasso96mode, but it is not included with OS4 anymore. I want it back!

> Nobody stole it. IIRC it is still included on the OS4Final CDs.

I found it again. Some other program put its icon at exactly the same position as p96mode prefs, so I didn't see it at first. Unfortunately I was wrong about being able to solve the problem with p96mode. The 1920x1600 mode I made was only displayed partially and the monitor said it was 1600x1200.

> What about using 59 Hz?
No. If I ask for 59 I get 59, if I ask for 60 I get 61.

Kind regards,

Dennis

@Swisso

Quote:

I am not an expert here but you appear to have three modes listed as XXXX x 1200 and also 2 listed as xxx x 600 all at 60 hz. Surely if the width changes then at least one other factor in the equation should change also. Just my tuppence worth.

Yes, but not all factors in the equation, such as the pixelclock, are displayed it the tooltypes.

Kind regards,

Dennis

@Severin

Quote:

ok, looking at the specs of your monitor I suggest you try: VSYNCMIN=59 VSYNCMAX=75 HSYNCMIN=31500 HSYNCMAX=80000 ALL your min / max settings were out of your monitors range which can cause problems. There are more options for the tooltypes to tweak them a bit more, but I can't remember them off hand as the defaults have always worked for me.

Only the HSYNCMAX was out of range; must have been a typo. But I'll try your suggestion anyway. Thank you.

If it still doesn't work I'll drag a PC overhere and see what that does.

Kind regards,

Dennis

@A3000T

Quote:

Unfortunately I was wrong about being able to solve the problem with p96mode. The 1920x1600 mode I made was only displayed partially and the monitor said it was 1600x1200.

Well, when your monitor is so picky about the exact timing and frequencies using
Picasso6Mode is IMHO your only chance. It has lots of sliders and even the possibility
to fine-tune the properties with the keyboard while a test screen is displayed.
Some monitors have an "Auto" button for automatic fullscreen display of any mode.
Some monitors use the horizontal and/or vertical sync polarity to detect the resolution.
However, I dont remember ATM if the Radeon driver allows toggling both sync polarities.

@TetiSoft

I played with p96mode a little more and also connected a PC. The monitor does display an error message when the frequency is out of range. Both the graphic board and the monitor are capable of displaying a 1920x1200 screenmode correctly. Maybe the Amiga Radeon driver doesn't support such a high resolution. Is there anyone here who can confirm that?

Kind regards,

Dennis

@A3000T

There's no reason it shouldn't handle that screen size, Try testing in 8 and 16 bit modes.

btw, did you see my edited post about the modes settings?

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X1000 beta tester, Sam440 Flex (733)

Visit the Official OS4 Support Site for more help.

It may be that your sole purpose is to serve as a warning to others.

@Severin

Quote:

There's no reason it shouldn't handle that screen size, Try testing in 8 and 16 bit modes. btw, did you see my edited post about the modes settings?

I did change the tooltypes to contain only the screenmodes listed in the manual. 1920x1200 continues to be a problem (I tried all colourdepths). If it is configured with the tooltypes the monitor will remain black, but won't go in standbymode and won't display an error message like it does when the signal is out of range.

With p96mode I do get an image, but anything over 1600 wide is scaled down to 1600 by something. I checked that the monitor can display the screenmode correctly with a PC, so the problem must be in the software.

Kind regards,

Dennis

@All

I searched the forums a little more, and a came across two other people who had the same problem as me. 1920x1200 is scaled down to 1600x1200 or not displayed at all, while it works fine on a PC. It reminds me of the 4GB limit for harddisk partitions we used to have several years ago: It works, but you can only use part of it.

Can the people who maintain picasso96 and/or the drivers please take a look at this problem?

Kind regards,

Dennis

@A3000T

Quote:

I bet I could solve all these problems in less than a minute with Picasso96mode, but it is not included with OS4 anymore. I want it back!

Hmm, just looked in my Prefs drawer, and I have Picasso96Mode there. I'm running OS4 Final with the July patch.

I don't recall copying it back from the old install at least, so it must have been put there by the OS4 installer, either in Final or the July patch.

Edit:
Just double-checked the OS 4 Final ISO image (can't find the CD I burned last year from it), and it does have Picasso96Mode in the System/Prefs directory, and it's even a PPC program, not 68K.

Maybe you deleted it? I would say to copy it back from the Final CD into your Prefs drawer and use it to fix the screenmode.

Last edited by DWolfman on 03-Dec-2007 at 01:42 AM.

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@A3000T

Did you try "MODE=1920x1200@60+hsync-vsync" ?
The monitor specs state the mode is detected with positive horizontal and negative
vertical sync polarity.

Oh, and do you use a VGA to DVI adaptor? IIRC such a mode is (nearly?) outside
of the capabilities of single link DVI or something like that.

DVI does not work with os4 here, only VGA-cable. U-Boots shows but WB goes black. 1280x1024 60Hz (as maximum of this ViewSonic TFT) with a Radeon 9250 (and previously 8500) works fine. Anyone got Dvi to work? Only Morphos guys told me it does. Good for them:)