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Old 06-19-03, 04:28 AM   #1
caveman
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Default 980 XGL Card setup help required

Trying to setup a Quadro4 980 XGL on a HP workstation running redhat8 (2.4.18-14smp).
The card and driver install with out any errors but within an graphical application using GL the card is very sluggish and model manipulation is terrible.
Under the configuration GUI for the display there is an option "enable 3D hardware acceleration" but it is greyed out.

Can anybody shed some light on this?
Are there some Xserver options I can added to the X config file to remedy this?
ALso any option that can turn on/off "backing store" for X would be helpfull as well

Thanks
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Old 06-19-03, 01:53 PM   #2
herc
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Default

I have a 750 under RH7.3. And performance in nromal viewing mode is bad. In fact, my colleague who has a lower-end nvidia card gets much better performance!

When I place our program into hw stereo mode, the performance is much, much better.

Our application runs on other platforms (SGI, etc.) and we don't see any such performance degradation.

This looks to me like a driver bug. Also, someone else had posted a while back.

We bought a number of these cards specifically to use hw stereo under Linux. However, the performance in non-stereo makes things unusable at times.

I find this quite frustrating. A number of driver releases have come out but none of them have fixed this problem!

Can someone from nvidia comment? Or maybe tell us when we might expect a fix in a new driver?

Herc
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Old 06-20-03, 07:00 AM   #3
caveman
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Does the HW stereo relate to 3D visualization glasses or is it something we could try?
What setting to use?
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Old 06-20-03, 05:04 PM   #4
herc
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Quote:
Originally posted by caveman
Does the HW stereo relate to 3D visualization glasses or is it something we could try?
What setting to use?
The glasses themselves aren't needed as long as the driver has been configured. That is, the monitor can be put into the stereo mode and you'll see 2 images on-screen. To properly see the 3D effect one does need the glasses.

We have used nuvision, stereographics and eye3D glasses.

We use option 3. Below is from the README for the latest driver.

Herc


Option "Stereo" "integer"
Enable offering of quad-buffered stereo visuals on Quadro.
Integer indicates the type of stereo glasses being used:

1 - DDC glasses. The sync signal is sent to the glasses
via the DDC signal to the monitor. These usually
involve a passthrough cable between the monitor and
video card.

2 - "Blueline" glasses. These usually involve
a passthrough cable between the monitor and video
card. The glasses know which eye to display based
on the length of a blue line visible at the bottom
of the screen. When in this mode, the root window
dimensions are one pixel shorter in the Y dimension
than requested. This mode does not work with virtual
root window sizes larger than the visible root window
size (desktop panning).

3 - Onboard stereo support. This is usually only found
on professional cards. The glasses connect via a
DIN connector on the back of the video card.

4 - TwinView clone mode stereo. On video cards that
support TwinView, the left eye is displayed on the
first display, and the right eye is displayed on the
second display. This is normally used in conjuction
with special projectors to produce 2 polarized
images which are then viewed with polarized glasses.
To use this stereo mode, you must also configure
TwinView in clone mode with the same resolution,
panning offset, and panning domains on each display.

Stereo is only available on Quadro cards, and is not
supported in TwinView (with the exception of TwinView
clone mode stereo, option #4 above). Currently, stereo
operation may be "quirky" on the original Quadro (NV10)
chip and left-right flipping may be erratic. We are
trying to resolve this issue for a future release.
Default: Stereo is not enabled.
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