# Cannot downgrade from Cuda Toolkit 11.3

**URL:** <https://forums.developer.nvidia.com/t/cannot-downgrade-from-cuda-toolkit-11-3/181242>\
**Category:** CUDA Setup and Installation\
**Tags:** installation, cuda\
**Created:** [June 18, 2021, 2:36pm UTC](https://forums.developer.nvidia.com/t/cannot-downgrade-from-cuda-toolkit-11-3/181242 "2021-06-18T14:36:01Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jollypumpkin](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@jollypumpkin](https://forums.developer.nvidia.com/u/jollypumpkin)\
**Post date:** [June 18, 2021, 2:36pm UTC](https://forums.developer.nvidia.com/t/cannot-downgrade-from-cuda-toolkit-11-3/181242/1 "2021-06-18T14:36:01Z")

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I have first installed Cuda Toolkit 11.3. Sadly Pytorch does not support it yet, so now I want to install cuda toolkit 11.1  
I have installed 11.3 via .deb, on Ubuntu 20.04

For uninstallation I have followed  
[https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#removing-cuda-tk-and-driver](https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#removing-cuda-tk-and-driver)

For installing 11.1 I followed [https://developer.nvidia.com/cuda-11.1.0-download-archive?target\_os=Linux&target\_arch=x86\_64&target\_distro=Ubuntu&target\_version=2004&target\_type=deblocal](https://developer.nvidia.com/cuda-11.1.0-download-archive?target_os=Linux&target_arch=x86_64&target_distro=Ubuntu&target_version=2004&target_type=deblocal) However, apt still only gives me the opportunity to install 11.3.

Please give me advice how I can get fully rid of 11.3 and install 11.1

Thanks!

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**Author:** ![user13824](https://sea2.discourse-cdn.com/nvidia/user_avatar/forums.developer.nvidia.com/user13824/32/129605_2.png) [@user13824](https://forums.developer.nvidia.com/u/user13824)\
**Post date:** [March 7, 2022, 3:08pm UTC](https://forums.developer.nvidia.com/t/cannot-downgrade-from-cuda-toolkit-11-3/181242/2 "2022-03-07T15:08:08Z")

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Hi, there.  
Your steps are correct except when installing, you need to explicitly give the version number.  
check this for further details [software installation - How to install specific version of some package? - Ask Ubuntu](https://askubuntu.com/questions/428772/how-to-install-specific-version-of-some-package)

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**Author:** ![mikaelf](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@mikaelf](https://forums.developer.nvidia.com/u/mikaelf)\
**Post date:** [March 9, 2022, 3:51pm UTC](https://forums.developer.nvidia.com/t/cannot-downgrade-from-cuda-toolkit-11-3/181242/3 "2022-03-09T15:51:14Z")

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I looked at the documentation and compared with the guide I wrote for Cuda 9.2 here: [Installing CUDA Toolkit 9.2 on Ubuntu 16.04: Fresh Install, Install by Removing Older Version, Install and Retain Old Version | Amikelive | Technology Blog](https://tech.amikelive.com/node-859/installing-cuda-toolkit-9-2-on-ubuntu-16-04-fresh-install-install-by-removing-older-version-install-and-retain-old-version/)

They are still pretty similar. If you want to downgrade, you need to check if the deb packages for 11.3 are still installed. The command `dkpg -l | grep cuda` should be handy to help you figure out which packages that haven’t been removed.