Black background in WSL when running less command #5550

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opened 2026-01-31 00:15:55 +00:00 by claunia · 0 comments
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Originally created by @lucky-bai on GitHub (Dec 13, 2019).

Environment

Windows build number: Microsoft Windows [Version 10.0.18363.476]

Steps to reproduce

  1. Open bash
  2. Run less some-file.txt
  3. Scroll down a few lines
  4. Scroll back up a few lines

Expected behavior

less works normally:

image

Actual behavior

The background is black when I scroll up:

image

Originally created by @lucky-bai on GitHub (Dec 13, 2019). <!-- 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING: 1. If I delete this entire template and go my own path, the core team may close my issue without further explanation or engagement. 2. If I list multiple bugs/concerns in this one issue, the core team may close my issue without further explanation or engagement. 3. If I write an issue that has many duplicates, the core team may close my issue without further explanation or engagement (and without necessarily spending time to find the exact duplicate ID number). 4. If I leave the title incomplete when filing the issue, the core team may close my issue without further explanation or engagement. 5. If I file something completely blank in the body, the core team may close my issue without further explanation or engagement. All good? Then proceed! --> <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **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. If this is an application crash, please also provide a Feedback Hub submission link so we can find your diagnostic data on the backend. Use the category "Apps > Windows Terminal (Preview)" and choose "Share My Feedback" after submission to get the link. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none Windows build number: Microsoft Windows [Version 10.0.18363.476] ``` # Steps to reproduce 1. Open `bash` 2. Run `less some-file.txt` 3. Scroll down a few lines 4. Scroll back up a few lines # Expected behavior `less` works normally: ![image](https://user-images.githubusercontent.com/123435/70771947-f7c1b100-1d40-11ea-95d7-4c233983d93d.png) # Actual behavior The background is black when I scroll up: ![image](https://user-images.githubusercontent.com/123435/70771631-c98fa180-1d3f-11ea-95d6-403b7c9868a6.png)
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Reference: starred/terminal#5550