I try to run wsl --update in cmd (my current version is 4.19.104), but I can't update to newest version 4.19.121 which is needed for GPU support because it says there is no available update.
Windows build 20170.rs_prerelease, Beta channel
2 Answers
It has recently become simpler to update the WSL 2 Kernel: turn on "Receive updates for other Microsoft products when you update Windows OR Receive updates for other Microsoft products (Windows 10/Windows 11) in the Advanced options for Windows update. The WSL2 kernel will get updated automatically.
You can also install a slightly higher (minor version) from the Microsoft Catalog manually, but Windows Update (with the setting above) will attempt to downgrade you back to the lower version it thinks you should have. It is not worth the hassle to do manual updates (very little difference in kernel versions), but if you choose to do so DL the kernel from the link below, and make sure you have "Receive updates for other Microsoft products when you update Windows" off.
PS: you can also get even more granular with your version choices on Github (I assume you should also have "Receive updates for other Microsoft products when you update Windows" off.)
2At this time, this update is only available with Windows Insider Preview Build 20150. Make sure you have that installed and up to date.
On this Windows Dev Blog, they describe all the steps required to install the latest builds and WSL updates, check the status of your currently installed version, and rollback to a previous version.
According to that blog post, if you have the necessary requirements to install the update, it will come through Windows Update when you check for updates.
If you are having issues, it might be best to file and update them on the WSL Repository.
