NO_GPU_COMPATIBLE Ubuntu with zed-ros-wrapper, but not Depth Viewer

[stereolabs]

NO_GPU_COMPATIBLE Ubuntu with zed-ros-wrapper, but not Depth Viewer

[lewisanderson]

I tried running the samples provided with the ZED sdk.

ZED right image disparity works properly for me, when I use the version downloaded as part of the SDK. But when I build it myself (using CMake), it builds correctly but encounters the same runtime issue as the zed-ros-wrapper.

Therefore I have concluded that the issue is with my ZED sdk installation, or build procedure, and is probably not a bug in zed-ros-wrapper itself.

The exact error:
~/git/rightimagedisparity/build$ optirun ./ZED\ right\ image\ disparity
ZED SDK >> (Init) Best GPU Found : GeForce GTX 960M , ID : 0
ZED SDK >> (Init) Disparity mode has been set to Quality mode
ZED SDK >> (Init) Creating ZED GPU mem...
ZED SDK >> (Init) Starting Self-Calibration in background...
ZED SDK >> (Init) No compatible NVIDIA device found, disparity map unavailable.
NO_GPU_COMPATIBLE

[lewisanderson]

I figured it out! I have both cuda 7.0 and cuda 7.5 installed on this machine. It was finding 7.0 by default, but the latest version of the ZED sdk requires cuda 7.5. If you use the wrong one, you get the weird failure above.

My workaround is to add this line to my zed_wrapper/CMakeLists.txt:
SET(CUDA_TOOLKIT_ROOT_DIR /usr/local/cuda-7.5)
find_package(CUDA 7.5 REQUIRED)

With that workaround, zed_wrapper runs succesfully for me! I'm not sure what the proper solution is, I am open to suggestions.

I need both versions because I use another tool which relies on cuda 7.0. :(