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Strange Tales of WSL: WSLInterop Suddenly Broken
2021-02-13
Tags: English Blog Windows Linux

In the last days Git started to behave strangely in WSL. It will now always ask for credentials. Since I usually use Git from within VSCode and VSCode’s WSL-Plugin does some magic in the background it still works fine in VSCode. But in a standalone shell I get asked for user and password. A workaround is setting credential.helper=store or such. It will then even reuse the credentials of the VSCode plugin.

Further investigation revealed, that it was not Git that is broken but the WSLInterop feature. Normally you should be able to run Windows executables directly from WSL, as detailed here. But no longer in my WSL installation. Calling a Windows binary returns without any effect (and without errors).

A lengthy internet search gave nothing but general hints about WSLInterop and no hints about the phenomenon I observe. I’ll reasses the situation after installing Win10 20H2.

Update 2021-02-14: When cross-checking against the work laptop I realized, that interop was disabled altogether in /etc/wsl.conf. Still don’t know when this may have happened…