Forcing a 1:1 pixel aspect ratio on a LCD

  • Thread starter Thread starter CFran
  • Start date Start date
C

CFran

I now own a 5:4 LCD screen (a 17" Samsung SyncMaster 740n) and although
I managed to have a 1:1 pixel aspect ratio on every 1280xXXXX
resolution, or also on 1088x612, I have it stretched for 800x600 and
1024x768, and I can't find a way to resize that.

I have tried with PowerStrip's advanced timings with no luck, is there
some utility or some thing to do to achieve that? I'm sure I'm not the
only one to run into that type of problem, and I'm pretty sure that
someone must have found/made a solution to that, I just need to be
pointed to it
 
I now own a 5:4 LCD screen (a 17" Samsung SyncMaster 740n) and although
I managed to have a 1:1 pixel aspect ratio on every 1280xXXXX
resolution, or also on 1088x612, I have it stretched for 800x600 and
1024x768, and I can't find a way to resize that.

I have tried with PowerStrip's advanced timings with no luck, is there
some utility or some thing to do to achieve that? I'm sure I'm not the
only one to run into that type of problem, and I'm pretty sure that
someone must have found/made a solution to that, I just need to be
pointed to it
Click to expand...


Typically the control for this is in the video card settings
page.
 
"CFran" said:
I now own a 5:4 LCD screen (a 17" Samsung SyncMaster 740n) and although
I managed to have a 1:1 pixel aspect ratio on every 1280xXXXX
resolution, or also on 1088x612, I have it stretched for 800x600 and
1024x768, and I can't find a way to resize that.

I have tried with PowerStrip's advanced timings with no luck, is there
some utility or some thing to do to achieve that? I'm sure I'm not the
only one to run into that type of problem, and I'm pretty sure that
someone must have found/made a solution to that, I just need to be
pointed to it
Click to expand...

There is no easy solution. I tried "Fixed Aspect Ratio Scaling"
on my Nvidia FX5200 and got "Out of Range" on my monitor.
This thread is full of similar experiences.

http://www.nvnews.net/vbulletin/showthread.php?t=66608

Powerstrip can change a few parameters, but I don't know if
it can put black bars on one dimension of the display. I would
think the video card driver would have to do that. At least,
unless the video card driver exposes an API that other tools
can access and give the desired results. (Either the video
card driver and display control panel, working together, or
the video card driver offers an interface, that a company
like Entechtaiwan can make connections to.)

On the ATI side of things, I don't know if there is even an
option like Fixed Aspect Ratio Scaling. On the Nvidia side,
it does not appear to be refined, or perhaps the monitor
EDID is not sending the right information to make it work
properly.

I see people claiming that the OSD of the LCD panel should
perform this function, but this is something that should be
supported by the video card driver and control panel software,
and not the monitor. The monitor should remain dumb and
as standard in behavior as possible.

This is a picture showing the two nearest functions that could be
used. The ATI function is not the same thing.
http://www.planetamd64.com/index.php?act=Attach&type=post&id=2824

The Nvidia feature appears to be working in this thread:
http://www.planetamd64.com/index.php?showtopic=18177

You can continue reading the threads from this search:

http://www.altavista.com/web/results?q="fixed+aspect+ratio+scaling"

Paul
 
kony said:
Typically the control for this is in the video card settings
page.
Click to expand...

I know thaaanks. But as I said that will only work for the resolution
starting with 1280 or 1088x612 or 640x480, but not the two ones that
interest me
 
I know thaaanks. But as I said that will only work for the resolution
starting with 1280 or 1088x612 or 640x480, but not the two ones that
interest me
Click to expand...

You left out the majority of the details of what you're
doing, exactly. You might have been thinking about
something but you have to actually write it in clear detail
for us to know.

There is more than one way to change things, clear and
specific detail is important.

For example, you didn't even tell us about the system, only
the monitor.
 
kony said:
You left out the majority of the details of what you're
doing, exactly. You might have been thinking about
something but you have to actually write it in clear detail
for us to know.

There is more than one way to change things, clear and
specific detail is important.

For example, you didn't even tell us about the system, only
the monitor.
Click to expand...

OK OK, I have an Athlon 2400+ @ 2 GHz, 768 MB RAM @ 333 MHz, a GeForce
6200 NV4A with the 91.37 drivers, and you already know about the LCD.

I have set the fixed aspect ratio option in the nvidia control panel
thing, but as I said it works for some resolutions but not 800x600 or
1024x768, which are sometimes stretched out of range and sometimes just
stretched to the screen size.

Well that's pretty much all I can think about mentionning :-)
 
OK OK, I have an Athlon 2400+ @ 2 GHz, 768 MB RAM @ 333 MHz, a GeForce
6200 NV4A with the 91.37 drivers, and you already know about the LCD.

I have set the fixed aspect ratio option in the nvidia control panel
thing, but as I said it works for some resolutions but not 800x600 or
1024x768, which are sometimes stretched out of range and sometimes just
stretched to the screen size.

Well that's pretty much all I can think about mentionning :-)
Click to expand...


Try a different driver version.

Check your monitor OSD for any related settings. Is it
using DVI or analog? Try DVI or if you must with analog,
try setting different (probably lower) refresh rates in the
Display Properties windows interface.
 
kony said:
Try a different driver version.
Click to expand...

Well, the other one I already tried with before was a 83.XX iirc. by
different version should i look into even older versions?
Check your monitor OSD for any related settings.
Click to expand...

Besides Coarse, which deals with the width, nothing, and yet this
setting disappear as soon as the Auto button is pressed
Is it
using DVI or analog? Try DVI or if you must with analog,
Click to expand...

analog. could an analog-to-DVI adapter help?
try setting different (probably lower) refresh rates in the
Display Properties windows interface.
Click to expand...

well i've just tried that with 1024x768 @ 72 Hz, and after I fixed a
setting to correct the flickering, I had an image slightly stretched
horizontally instead of vertically, so that's a good sign, but it made
the image look pretty bad anyways (kind of anti aliasing) and from all
the time settings i've tried there's no way to fine tune that stretch.
I tried to with 800x600 without any luck so far
 
Well, the other one I already tried with before was a 83.XX iirc. by
different version should i look into even older versions?
Click to expand...

I had the 8x.xx series in mind as nVidia cards here are
using it and scale all supported resolutions fine (on a
different LCD).


Besides Coarse, which deals with the width, nothing, and yet this
setting disappear as soon as the Auto button is pressed


analog. could an analog-to-DVI adapter help?
Click to expand...


If you mean taking the DVI out from a video card and
converting to analog with a simple inline pin adapter, no.



well i've just tried that with 1024x768 @ 72 Hz, and after I fixed a
setting to correct the flickering, I had an image slightly stretched
horizontally instead of vertically, so that's a good sign, but it made
the image look pretty bad anyways (kind of anti aliasing) and from all
the time settings i've tried there's no way to fine tune that stretch.
I tried to with 800x600 without any luck so far
Click to expand...

You should be trying 60Hz.

It is expected that each time you change resolution or
refresh rate, it will stretch the screen too much one way or
the other until you manually adjust it with the monitors on
screen settings menu. Typically modern monitors have built
in memory to recall your adjustment for each resolution so
it only needs set once per resolution.


DVI from the system to the monitor is the typical way to
resolve the above, but keeping 1:1 is a matter of the video
card driver. Using the nVidia Detonator (the normal version
from nvidia.com, not some 3rd party altered driver), the
correct choice for 1:1 is labeled "Centered output".
 
kony said:
I had the 8x.xx series in mind as nVidia cards here are
using it and scale all supported resolutions fine (on a
different LCD).





If you mean taking the DVI out from a video card and
converting to analog with a simple inline pin adapter, no.





You should be trying 60Hz.

It is expected that each time you change resolution or
refresh rate, it will stretch the screen too much one way or
the other until you manually adjust it with the monitors on
screen settings menu. Typically modern monitors have built
in memory to recall your adjustment for each resolution so
it only needs set once per resolution.


DVI from the system to the monitor is the typical way to
resolve the above, but keeping 1:1 is a matter of the video
card driver. Using the nVidia Detonator (the normal version
from nvidia.com, not some 3rd party altered driver), the
correct choice for 1:1 is labeled "Centered output".
Click to expand...

I tried 81.84 and 78.05 and the result is the same. The weird thing is
that there is no such option as "Centered output"...
 
I tried 81.84 and 78.05 and the result is the same. The weird thing is
that there is no such option as "Centered output"...
Click to expand...


I don't have access to a system running the 8x.xx series at
the moment but to try it you might see if "coolbits+"
(Google search for it) will enable any hidden settings.

I do have a 78.05 version on the system I'm currently typing
on. On it, Display Propperties->Advanced->Geforce xxxxxxx
Tab->nView Display Settings (on popup menu)->Device Settings
(button on bottom right of main window)->Device
Adjustments...

The Device Adjustments window allows
- Display Adapter Scaling
- Centered Output
- Monitor Scaling
- Fixed Aspect Ratio

This is with a monitor hooked up to DVI, I don't know if all
these are available when using Analog.
 
kony said:
I don't have access to a system running the 8x.xx series at
the moment but to try it you might see if "coolbits+"
(Google search for it) will enable any hidden settings.

I do have a 78.05 version on the system I'm currently typing
on. On it, Display Propperties->Advanced->GefGTForce xxxxxxx
Tab->nView Display Settings (on popup menu)->Device Settings
(button on bottom right of main window)->Device
Adjustments...

The Device Adjustments window allows
- Display Adapter Scaling
- Centered Output
- Monitor Scaling
- Fixed Aspect Ratio

This is with a monitor hooked up to DVI, I don't know if all
these are available when using Analog.
Click to expand...

Apprently after a quick googling it seems like it's only for the DVI,
although one with analog claimed to have this as well. (I got it in
french so i'm translating, it's weird since I took the english version
of the driver) :

-Autodetection
-GTF
-DMT
-SVC
-Synchronization of the fixed height/width ratio
 
Back
Top