# There is no device supporting CUDA. **URL:** \ **Category:** CUDA Programming and Performance\ **Created:** [August 12, 2009, 12:44am UTC](https://forums.developer.nvidia.com/t/there-is-no-device-supporting-cuda/11520 "2009-08-12T00:44:38Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![leeiq](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@leeiq](https://forums.developer.nvidia.com/u/leeiq)\ **Post date:** [August 12, 2009, 12:44am UTC](https://forums.developer.nvidia.com/t/there-is-no-device-supporting-cuda/11520/1 "2009-08-12T00:44:38Z")
I have used CUDA for one month on my computer and it works good all the time, yesterday I found that it can not find CUDA, when I runned deviceQuery, the results comes out as: ```auto CUDA Device Query (Runtime API) version (CUDART static linking) There is no device supporting CUDA. Device 0: "Device Emulation (CPU)" CUDA Capability Major revision number: 9999 CUDA Capability Minor revision number: 9999 Total amount of global memory: 4294967295 bytes Number of multiprocessors: 16 Number of cores: 128 Total amount of constant memory: 65536 bytes Total amount of shared memory per block: 16384 bytes Total number of registers available per block: 8192 Warp size: 1 Maximum number of threads per block: 512 Maximum sizes of each dimension of a block: 512 x 512 x 64 Maximum sizes of each dimension of a grid: 65535 x 65535 x 1 Maximum memory pitch: 262144 bytes Texture alignment: 256 bytes Clock rate: 1.35 GHz Concurrent copy and execution: No Run time limit on kernels: No Integrated: Yes Support host page-locked memory mapping: Yes Compute mode: Default (multiple host threads can use this device simultaneously) Test PASSED ``` I have updated the SDK and tried reinstall driver after toolkit, but it fails anyway. Is there any reason that can result in such a situation. PS: GTX 285 for Mac Pro and Mac OS X 10.5.7 ---
**Author:** ![gshi](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@gshi](https://forums.developer.nvidia.com/u/gshi)\ **Post date:** [August 13, 2009, 6:16pm UTC](https://forums.developer.nvidia.com/t/there-is-no-device-supporting-cuda/11520/2 "2009-08-13T18:16:15Z")
check your cable connection/reboot/etc > [@](#): > > I have used CUDA for one month on my computer and it works good all the time, yesterday I found that it can not find CUDA, when I runned deviceQuery, the results comes out as: > > ```auto > CUDA Device Query (Runtime API) version (CUDART static linking) > > There is no device supporting CUDA. > > Device 0: "Device Emulation (CPU)" > > CUDA Capability Major revision number: 9999 > > CUDA Capability Minor revision number: 9999 > > Total amount of global memory: 4294967295 bytes > > Number of multiprocessors: 16 > > Number of cores: 128 > > Total amount of constant memory: 65536 bytes > > Total amount of shared memory per block: 16384 bytes > > Total number of registers available per block: 8192 > > Warp size: 1 > > Maximum number of threads per block: 512 > > Maximum sizes of each dimension of a block: 512 x 512 x 64 > > Maximum sizes of each dimension of a grid: 65535 x 65535 x 1 > > Maximum memory pitch: 262144 bytes > > Texture alignment: 256 bytes > > Clock rate: 1.35 GHz > > Concurrent copy and execution: No > > Run time limit on kernels: No > > Integrated: Yes > > Support host page-locked memory mapping: Yes > > Compute mode: Default (multiple host threads can use this device simultaneously) > > Test PASSED > > ``` > > I have updated the SDK and tried reinstall driver after toolkit, but it fails anyway. Is there any reason that can result in such a situation. > > PS: GTX 285 for Mac Pro and Mac OS X 10.5.7 ---
**Author:** ![leeiq](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@leeiq](https://forums.developer.nvidia.com/u/leeiq)\ **Post date:** [August 17, 2009, 6:58pm UTC](https://forums.developer.nvidia.com/t/there-is-no-device-supporting-cuda/11520/3 "2009-08-17T18:58:52Z")
> [@](#): > > check your cable connection/reboot/etc Connection is good, and I rebooted it several times, the error is still there, anyone has any idea? ---
**Author:** ![jam11](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@jam11](https://forums.developer.nvidia.com/u/jam11)\ **Post date:** [September 5, 2009, 1:28pm UTC](https://forums.developer.nvidia.com/t/there-is-no-device-supporting-cuda/11520/4 "2009-09-05T13:28:40Z")
> [@](#): > > Connection is good, and I rebooted it several times, the error is still there, anyone has any idea? I am not a MAC users but I had similar problems under Linux. The trick is to load the X server with all the windows managers and than log out of the X. In console mode, the nvidia driver will still be loaded and the cuda device will be on. I had to use this to get the cuda-dbg working. When you first boot up the system in console mode, the nvidia driver is not loaded and the GPU device is not available. One benifit of this , is that more host memory is free. Or the card has to be remove and inserted back. This happened also. :mellow: ---
**Author:** ![mat](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@mat](https://forums.developer.nvidia.com/u/mat)\ **Post date:** [September 8, 2009, 12:45pm UTC](https://forums.developer.nvidia.com/t/there-is-no-device-supporting-cuda/11520/5 "2009-09-08T12:45:18Z")
A bad setting of the attributes of the device file /dev/nvidia\* is likely to generate a similar problem on a linux box (maybe on a macosx box too). Be sure the users that are using cuda have a read/write access on the /dev/nvidia\* device files.