starred/terminal
1
0
Fork 0
mirror of https://github.com/microsoft/terminal.git synced 2026-09-24 16:05:21 +00:00
Code Issues 19.0k Packages Projects Releases 20 Wiki Activity

Less Pollutes Scrollback Buffer in WSL/Ubuntu #7233

New Issue
Closed
opened 2026-01-31 00:58:33 +00:00 by claunia · 3 comments
claunia commented 2026-01-31 00:58:33 +00:00
Owner
Copy Link

Originally created by @lvfrazao on GitHub (Mar 31, 2020).

Environment

Windows build number: Microsoft Windows NT 10.0.18363.0
Windows Terminal version (if applicable): Version: 0.10.781.0

Any other software?
WSL v1
less 
$ less --version
less 487 (GNU regular expressions)
Copyright (C) 1984-2016  Mark Nudelman

less comes with NO WARRANTY, to the extent permitted by law.
For information about the terms of redistribution,
see the file named README in the less distribution.
Homepage: http://www.greenwoodsoftware.com/less

Steps to reproduce

  1. Generate file with random text (enough lines to fill up the screen): $ head -1000 /dev/urandom | tr -dc A-Za-z0-9 > rand.txt
  2. Fill scrollback with content: $ for i in {1..100}; do echo $i; done;
  3. Open file with random text with less: $ less rand.txt
  4. Use the down arrow or pgdn keys to scroll down a bit
  5. Exit less and scroll up

Expected behavior

Scrolling up shows input and output from previous terminal commands.

Actual behavior

Scrolling up shows the lines that were viewed in less and overwrites the previous output.

wt_issue

This may be a duplicate of: https://github.com/microsoft/terminal/issues/3492

Originally created by @lvfrazao on GitHub (Mar 31, 2020). # Environment ```none Windows build number: Microsoft Windows NT 10.0.18363.0 Windows Terminal version (if applicable): Version: 0.10.781.0 Any other software? WSL v1 less $ less --version less 487 (GNU regular expressions) Copyright (C) 1984-2016 Mark Nudelman less comes with NO WARRANTY, to the extent permitted by law. For information about the terms of redistribution, see the file named README in the less distribution. Homepage: http://www.greenwoodsoftware.com/less ``` # Steps to reproduce 1. Generate file with random text (enough lines to fill up the screen): `$ head -1000 /dev/urandom | tr -dc A-Za-z0-9 > rand.txt` 2. Fill scrollback with content: `$ for i in {1..100}; do echo $i; done;` 3. Open file with random text with less: `$ less rand.txt` 4. Use the down arrow or pgdn keys to scroll down a bit 5. Exit less and scroll up # Expected behavior Scrolling up shows input and output from previous terminal commands. # Actual behavior Scrolling up shows the lines that were viewed in less and overwrites the previous output. ![wt_issue](https://user-images.githubusercontent.com/31864869/78043654-9c441f00-7341-11ea-8d70-d7e55e9b4656.gif) **This may be a duplicate of: https://github.com/microsoft/terminal/issues/3492**
claunia added the Resolution-Duplicate label 2026-01-31 00:58:33 +00:00
claunia commented 2026-01-31 00:58:34 +00:00
Author
Owner
Copy Link

@lvfrazao commented on GitHub (Mar 31, 2020):

Slightly more info, this happens with less, but not with vim or nano.

Would appreciate any known workarounds as this makes working in the terminal rather difficult as I basically lose the ability to review previous output anytime I use less.

@lvfrazao commented on GitHub (Mar 31, 2020): Slightly more info, this happens with `less`, but not with `vim` or `nano`. Would appreciate any known workarounds as this makes working in the terminal rather difficult as I basically lose the ability to review previous output anytime I use less.
claunia commented 2026-01-31 00:58:35 +00:00
Author
Owner
Copy Link

@zadjii-msft commented on GitHub (Mar 31, 2020):

Thanks for the report! This is actually already being tracked by another issue on our repo - please refer to #4676 for more discussion.

/dup #4676

(Apparently that one's actually a dupe of the root cause over in #381)

@zadjii-msft commented on GitHub (Mar 31, 2020): Thanks for the report! This is actually already being tracked by another issue on our repo - please refer to #4676 for more discussion. /dup #4676 (Apparently that one's actually a dupe of the root cause over in #381)
claunia commented 2026-01-31 00:58:35 +00:00
Author
Owner
Copy Link

@ghost commented on GitHub (Mar 31, 2020):

Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!

@ghost commented on GitHub (Mar 31, 2020): Hi! We've identified this issue as a duplicate of another one that already exists on this Issue Tracker. This specific instance is being closed in favor of tracking the concern over on the referenced thread. Thanks for your report!
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
⛺ Reserved
A11yCO
A11yMAS
A11ySev1
A11ySev2
A11ySev3
A11yTTValidated
A11yUsable
A11yVoiceAccess
A11yWCAG
Area-Accessibility
Area-AtlasEngine
Area-AzureShell
Area-Build
Area-Build
Area-Chat
Area-CmdPal
Area-CodeHealth
Area-Commandline
Area-CookedRead
Area-DefApp
Area-Extensibility
Area-Fonts
Area-GroupPolicy
Area-i18n
Area-Input
Area-Interaction
Area-Interop
Area-Localization
Area-Output
Area-Performance
Area-Portable
Area-Quality
Area-Remoting
Area-Rendering
Area-Schema
Area-Server
Area-Settings
Area-SettingsUI
Area-ShellExtension
Area-ShellExtension
Area-ShellExtension
Area-Suggestions
Area-Suggestions
Area-TerminalConnection
Area-TerminalControl
Area-Theming
Area-UserInterface
Area-VT
Area-Windowing
Area-WPFControl
AutoMerge
Blocking-Ingestion
Culprit-Centennial
Culprit-WinUI
Disability-All
Disability-Blind
Disability-LowVision
Disability-Mobility
External-Blocked-WinUI3
Fixed
Gathering-Data
good first issue
HCL-E+D
HCL-WindowsTerminal
Help Wanted
Impact-Compatibility
Impact-Compliance
Impact-Correctness
Impact-Visual
In-PR
InclusionBacklog
InclusionBacklog-Windows TerminalWin32
InclusionCommitted-202206
Issue-Bug
Issue-Docs
Issue-Feature
Issue-Feature
Issue-Question
Issue-Samples
Issue-Scenario
Issue-Task
Needs-Attention
Needs-Author-Feedback
Needs-Bisect
Needs-Discussion
Needs-Repro
Needs-Tag-Fix
Needs-Tag-Fix
Needs-Triage
No-Recent-Activity
Priority-0
Priority-1
Priority-2
Priority-3
Product-Cmd.exe
Product-Colortool
Product-Colortool
Product-Colortool
Product-Conhost
Product-Conpty
Product-Meta
Product-Powershell
Product-Terminal
Product-WSL
pull-request
Mirrored from GitHub Pull Request
 Resolution-Answered
Resolution-By-Design
Resolution-Duplicate
Resolution-External
Resolution-Fix-Available
Resolution-Fix-Committed
Resolution-No-Repro
Resolution-Won't-Fix
Severity-Blocking
Severity-Crash
Severity-DataLoss
spam
this-will-be-a-breaking-change
Tracking-External
WindowsTerminal_Win32
Work-Item
zAskModeBug
zInbox-Bug
No Label Resolution-Duplicate
Milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
claunia
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: starred/terminal#7233
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?