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Display problem when using "less" command #9431

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TypicalSEE opened this issue Mar 10, 2021 · 11 comments
Closed

Display problem when using "less" command #9431

TypicalSEE opened this issue Mar 10, 2021 · 11 comments
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Needs-Author-Feedback The original author of the issue/PR needs to come back and respond to something Needs-Tag-Fix Doesn't match tag requirements Needs-Triage It's a new issue that the core contributor team needs to triage at the next triage meeting Resolution-External For issues that are outside this codebase Resolution-Fix-Available It's available in an Insiders build or a release Tracking-External This bug isn't resolved, but it's following an external workitem.

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@TypicalSEE
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Windows: Microsoft Windows [版本 10.0.19041.804]
Terminal: 1.6.10571.0

Hi, I'm using OpenSSH to connect to a remote Linux server under Windows Terminal. But the output of "less -SN" seems not normal. The first screenshot shows it: the 19th line appears besides the 1st line. The second screenshot is the normal output (after I quit and type that command again). Unexpected output were not about a fixed line. Sometimes it's the 1st line overlapping with another line but other times it was some other lines repeating themselves. I had been using Putty to connect to a remote servers before but nerver met this problem so I think it might be a bug of Windows Terminal. Thanks.
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@ghost ghost added Needs-Triage It's a new issue that the core contributor team needs to triage at the next triage meeting Needs-Tag-Fix Doesn't match tag requirements labels Mar 10, 2021
@zadjii-msft
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@TypicalSEE Which version of ssh are you using?

@zadjii-msft zadjii-msft added the Needs-Author-Feedback The original author of the issue/PR needs to come back and respond to something label Mar 10, 2021
@DHowett
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DHowett commented Mar 10, 2021

This sounds like #9176.

@TypicalSEE
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@TypicalSEE Which version of ssh are you using?

"OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5", installed from Windows 10 “Optional Feature”.

@ghost ghost added Needs-Attention The core contributors need to come back around and look at this ASAP. and removed Needs-Author-Feedback The original author of the issue/PR needs to come back and respond to something labels Mar 11, 2021
@DHowett
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DHowett commented Mar 11, 2021

In that case, I suspect that you're hitting the screen size change buffering issue in PowerShell/openssh-portable#426. Even though it doesn't look like the screen size is changing, less is turning on the "alternate buffer" which reports a window resize. OpenSSH, until pull 426, had trouble handling the resize event.

If you run OpenSSH 8.1 from the win32-openssh releases page, does it go away?

@DHowett DHowett added Needs-Author-Feedback The original author of the issue/PR needs to come back and respond to something and removed Needs-Attention The core contributors need to come back around and look at this ASAP. labels Mar 11, 2021
@TypicalSEE
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Downloaded OpenSSH 8.1 from that page and tried it, the problem still exists. By the way, ssh version of my remote server is "OpenSSH_7.4p1, OpenSSL 1.0.2k-fips 26 Jan 2017". Should I also upgrade that one?

@ghost ghost added Needs-Attention The core contributors need to come back around and look at this ASAP. and removed Needs-Author-Feedback The original author of the issue/PR needs to come back and respond to something labels Mar 12, 2021
@jdebp
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jdebp commented Mar 12, 2021

Three answers will help the Microsoft (and other) people:

  • Does this happen as you scroll up and down? Or initially when less first displays the file?
  • What happens when you tell less to redraw the screen?
  • What is the value of the TERM environment variable on the system that is actually running the less program?

@DHowett
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DHowett commented Mar 12, 2021

I apologize. The pull request that fixes the buffering/repeat issue merged on April 2, 2020 but the 8.1 release came out in Dec 2019. I do not know why I thought it might help. 😄

@zadjii-msft
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@TypicalSEE There's now an OpenSSH 8.6 (https://github.com/PowerShell/Win32-OpenSSH/releases/tag/V8.6.0.0p1-Beta), mind trying that one? We think that might have the fix

@zadjii-msft zadjii-msft added Needs-Author-Feedback The original author of the issue/PR needs to come back and respond to something and removed Needs-Attention The core contributors need to come back around and look at this ASAP. labels Nov 23, 2021
@ghost ghost added the No-Recent-Activity This issue/PR is going stale and may be auto-closed without further activity. label Nov 28, 2021
@ghost
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ghost commented Nov 28, 2021

This issue has been automatically marked as stale because it has been marked as requiring author feedback but has not had any activity for 4 days. It will be closed if no further activity occurs within 3 days of this comment.

@sarbian
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sarbian commented Nov 28, 2021

I had a similar issue and that version fixed it.

@ghost ghost removed the No-Recent-Activity This issue/PR is going stale and may be auto-closed without further activity. label Nov 28, 2021
@zadjii-msft
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I'll count that, thanks for confirming!

@zadjii-msft zadjii-msft added Tracking-External This bug isn't resolved, but it's following an external workitem. Resolution-External For issues that are outside this codebase Resolution-Fix-Available It's available in an Insiders build or a release labels Nov 29, 2021
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Needs-Author-Feedback The original author of the issue/PR needs to come back and respond to something Needs-Tag-Fix Doesn't match tag requirements Needs-Triage It's a new issue that the core contributor team needs to triage at the next triage meeting Resolution-External For issues that are outside this codebase Resolution-Fix-Available It's available in an Insiders build or a release Tracking-External This bug isn't resolved, but it's following an external workitem.
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@DHowett @sarbian @zadjii-msft @TypicalSEE @jdebp