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VT input tunneling breaks some applications that use VT_PROCESSING but not VT_INPUT #6864

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opened 2026-01-31 00:49:14 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 00:49:14 +00:00
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Originally created by @DHowett-MSFT on GitHub (Mar 13, 2020).

Related to #4873. When Win32-OpenSSH passes through a request for application cursor keys, we dutifully start sending them. Win32-OpenSSH doesn't use VT_INPUT, though, so parsing those arrow keys falls to ConPTY. ConPTY can't do it.

Therefore, Vim in SSH can't be arrow-keyed around.

This bug tracks the quick fix work to unblock 0.10, and should be reverted when #4873 lands.

Originally created by @DHowett-MSFT on GitHub (Mar 13, 2020). Related to #4873. When Win32-OpenSSH passes through a request for application cursor keys, we dutifully start sending them. Win32-OpenSSH doesn't use VT_INPUT, though, so parsing those arrow keys falls to ConPTY. ConPTY can't do it. Therefore, Vim in SSH can't be arrow-keyed around. This bug tracks the quick fix work to unblock 0.10, and should be reverted when #4873 lands.
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Reference: starred/terminal#6864
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