Program Closes Computing DepthMap

**Andrea Alessi** · 2015-08-27, 12:07 PM

Hello dtmcnamara,

I think Roberto already replied you privately, sorry if this is redundant.

With Zephyr 2.0 we upgraded to Cuda7, so my guess is that your drivers might not be the latest available. We added a driver version check but i'm guessing it's some kind of driver version check issue with your multi gpu rig (i'm very jelly about it btw)

Could you please tell me your specific driver version, and if it's not the latest available, try to update it?

If it's the latest avilable, maybe try installing the cuda toolkit (it includes developer drivers) as a test

**dtmcnamara** · 2015-08-28, 02:48 AM

Yes, it looks like the problem is with the Tesla card that I run. When I disable the card and run just the GTX cards everything works just fine. I will play around with the CUDA toolkit later this weekend and see if I can fix the problem, Im really interested in seeing how well the Zephyr software works with the co-processors.

Thanks for the reply

**Till** · 2015-09-07, 05:58 PM

Hi,

I'm working with a GeForce GTX 570 and recently upgraded to Zephyr Pro 2.0. I have the same Cuda problem. After much installation trouble two weeks ago, my graphics driver was finally recognized as up to date (version 347.62). But Cuda made Zephyr crash anyway. So as suggested by 3DF I upgraded Cuda:

Selected Cuda driver components:
- Cuda Toolkit (V. 7.0 -> 7.0) (yes, installed this two week ago already, didn't help)
- GPU Deployment Kit (n/a -> 347.62)
---> Graphics driver (355.82 -> 347.62) FORCED DOWNGRADE!

Not selected after trying:
- Cuda Visual Studio Integration (n/a -> 7.0)
=> Cuda Toolkit wants Visual Studio.
- Installed VS Code (quite small) --> "no supported version found"
- VS Community -> 7GB that I don't need? NO WAY!

I really hope that making Zephyr work does not mean that I need to install 7GB of unwanted stuff on my computer!

So after the Cuda installer downgraded my graphics driver Zephyr again tells me at start-up that a compatible graphics card was found on my system but the drivers are not updated and computation will run in CPU mode and can be considerably slower.

Good job. I'd rather go back to the previous Cuda version, at least it worked! I'm wasting an ungodly amount of time on this "upgrade".

**Andrea Alessi** · 2015-09-07, 07:48 PM

Hello Till,

sorry to hear about your issue.

I can tell for sure this is not related to your installation problem of two weeks ago (as you might recall, your license was expired and we had to manually renew it).

You don't need to install VS community, that's for sure and you can at anytime fall back to 1.6 and Cuda 6.5: if you wish to do so, old installers are available at the usual download URL.

I'll try to find somebody willing to borrow me a GTX570 or similar generation card since it's a pretty old one and there might be some driver issues that we need to investigate. Not saying that's the reason, but it might be worth checking it, i'll followup shortly!

Andrea

**Andrea Alessi** · 2015-09-10, 07:31 PM

I can confirm that we isolated the issue.

The issue happens when running CUDA 7 on older cards (Capabilities 2.0).

We are working on a fix which will be available in the next update, scheduled for next week!

Andrea

**Roberto** · 2015-09-16, 01:37 AM

We just released a new version (2.050) with the fix for the crash.
The old Nvidia cards now works properly, but please note that due to their low Cuda capabilities, some specific parts of the multiview stereo pipeline will run on cpu.

Program Closes Computing DepthMap

Program Closes Computing DepthMap

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