Jetson AGX Xavier can't use GPU after trying to install Cuda 11.1 manually

Hi, I tried to install Cuda 11.1 from “https://developer.nvidia.com/cuda-downloads” manually and since then I can’t access the GPU. I uninstalled Cuda 11.1 and reinstalled Cuda 10 but the same. With booth the Cuda deviceQuery gives Error 999.
What could be the Problem?

Hi patrick.bayer,

That version from “https://developer.nvidia.com/cuda-downloads” can’t work on Jetson platform.
Please download SDK Manager, and follow these instructions to use JetPack to install CUDA toolkit for Jetson platform.

I installed the Cuda 10 manually with the URL from SDKManager so it should work right? The SDKManager failed because of bad Internet Connection so I loaded it on a different PC and copied it to the Xavier. The weird thing is, also the GUI when I connect with HDMI directly is not working anymore

At this case, I will suggest to flash the device and install from SDKManager again.

I just recognized I have R32 3.1 on the Xavier and installed Cuda 10.2 withJetpack 4.4 that can’t work right? How can I install older Versions ? Can I install an older SDKManager?

There are dependency between JetPack and CUDA, also other libraries and toolkits, that’s why it’s not working, you can use SDKManager to get the older version of JetPack to flash you Xavier and setup development environment at same version.

Please download SDK Manager, and follow these instructions to use JetPack to install CUDA toolkit for Jetson platform.

So i flashed the Xavier after flashing it says finish the ubuntu wizard and after log in it started installing cuda but failed because of no internet connection i thought the usb offers connection automaticaly after flashing.

Hi patrick.bayer,

What JetPack version are you install?
The CUDA version is depends on JetPack version, you can’t install different cuda version with differnet JetPack version.

Are you connect internet cable on your Xavier board? please make sure your eth0 is working. You can use “ifconfig” command to check.