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erratic cursor and display in emacs #416

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opened 2026-01-30 21:51:42 +00:00 by claunia · 0 comments
claunia commented 2026-01-30 21:51:42 +00:00
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Originally created by @christianpaquin on GitHub (Oct 12, 2018).

Originally assigned to: @zadjii-msft on GitHub.

This bug-tracker is monitored by Windows Console development team and other technical types. We like detail!

If you have a feature request, please post to the UserVoice.

Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue.

Please use this form and describe your issue, concisely but precisely, with as much detail as possible

  • Your Windows build number: (Type ver at a Windows Command Prompt)
    Microsoft Windows [Version 10.0.17763.1]
    Windows 10, version 1809 installed on Oct 4, 2018.

  • What you're doing and what's happening: (Copy & paste specific commands and their output, or include screen shots)

  1. I installed Ubuntu 18.04 from the Windows Store, and "sudo apt-get emacs" (v25.2.2 was installed)
  2. open a file larger than the console height (I used a large C file)
  3. start moving the cursor using alt-f (to move forward word to word); at some point the cursor visually jumps at the end of line but actually remains where it is supposed to be (hitting ctrl-l to re-center the screen around the current line refreshed the screen correctly)
  4. when editing the text, the display gets garbled, the letters appearing on subsequent lines. This only affects the buffer visually, the logical buffer is ok ((hitting ctrl-l to re-center the screen around the current line refreshed the screen correctly)
  • What's wrong / what should be happening instead:
    The cursor becomes erratic and the display gets garbled after moving the cursor and moving down the file. This started happening after the 1809 update.

PS: this seems to be the same behavior as in WSL's issue 3587

Originally created by @christianpaquin on GitHub (Oct 12, 2018). Originally assigned to: @zadjii-msft on GitHub. This bug-tracker is monitored by Windows Console development team and other technical types. **We like detail!** If you have a feature request, please post to [the UserVoice](https://wpdev.uservoice.com/forums/266908). > **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. Please use this form and describe your issue, concisely but precisely, with as much detail as possible * Your Windows build number: (Type `ver` at a Windows Command Prompt) Microsoft Windows [Version 10.0.17763.1] Windows 10, version 1809 installed on Oct 4, 2018. * What you're doing and what's happening: (Copy & paste specific commands and their output, or include screen shots) 1. I installed Ubuntu 18.04 from the Windows Store, and "sudo apt-get emacs" (v25.2.2 was installed) 2. open a file larger than the console height (I used a large C file) 3. start moving the cursor using alt-f (to move forward word to word); at some point the cursor visually jumps at the end of line but actually remains where it is supposed to be (hitting ctrl-l to re-center the screen around the current line refreshed the screen correctly) 4. when editing the text, the display gets garbled, the letters appearing on subsequent lines. This only affects the buffer visually, the logical buffer is ok ((hitting ctrl-l to re-center the screen around the current line refreshed the screen correctly) * What's wrong / what should be happening instead: The cursor becomes erratic and the display gets garbled after moving the cursor and moving down the file. This started happening after the 1809 update. PS: this seems to be the same behavior as in [WSL's issue 3587](https://github.com/Microsoft/WSL/issues/3587)
claunia added the Product-ConhostResolution-Fix-AvailableWork-Item labels 2026-01-30 21:51:42 +00:00
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