Pylance does not boot properly and fails to highlight text when used on an SSH remote

[xhluca]

A follow up on #6442.

This issue still happens a lot to me, when i'm ssh'd to a remote. Using the "exclude" trick above doesn't help.

Usually i would change to pre-release then reload, sometimes that fixes it, but the next time I SSH to the remote the issue arises again (everything unhighlighted). I'm not sure what's the cause as I didn't change much from my workflow apart, this simply started happening a month or two ago.

I'm creating an issue based on advice from: #6442 (comment)

Environment data

• Pylance version: v2024.8.2
• OS and version: Ubuntu 22.04
• Python version (& distribution if applicable, e.g. Anaconda): 3.10.13

Code Snippet

N/A

Repro Steps

1. SSH to remote
2. Install Pylance

Expected behavior

Pylance should work

Actual behavior

Pylance does not boot, there's no error message

Logs

I enabled traces but there are not traces that appear.

[xhluca]

Is there any command I can run? After enabling traces, nothing appears in the terminal, "output", etc.

[rchiodo]

The Python output tab should indicate whether or not it could load Pylance or not. Sounds like it's failing to load Pylance at all.

[xhluca]

That's interesting. I don't see anything in the "Python" tab.

[rchiodo]

If you run 'Toggle Developer Tools', the console on that page might show something. The Python output tab should definitely be there though if the Python extension is installed.

[xhluca]

Ah I didn't know that! After switching to Python, I found those logs:

2024-11-26 15:57:21.155 [info] Experiment 'pythonRecommendTensorboardExt' is active
2024-11-26 15:57:21.155 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2024-11-26 15:57:21.155 [info] Experiment 'pythonTestAdapter' is active
2024-11-26 15:57:21.156 [warning] Dir "/home/users/myname/myproject/.pixi/envs" is not watchable (directory does not exist)
2024-11-26 15:57:21.201 [info] Default formatter is set to ms-python.black-formatter for workspace /home/users/myname/myproject
2024-11-26 15:57:21.624 [info] > ./venv/bin/python -I ~/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/python_files/get_output_via_markers.py ~/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/python_files/interpreterInfo.py
2024-11-26 15:57:21.665 [info] > ~/.pyenv/bin/pyenv which python
2024-11-26 15:57:21.666 [info] cwd: .
2024-11-26 15:57:21.758 [info] Python interpreter path: ./venv/bin/python
2024-11-26 15:57:21.902 [info] > pixi --version
2024-11-26 15:57:21.903 [warning] could not find a pixi interpreter for the interpreter at /home/users/myname/myproject/venv/bin/python
2024-11-26 15:57:21.927 [error] [
  `Failed to start language server, Class name = h, completed in 53ms, has a falsy return value, Arg 1: <Uri:/home/users/myname/myproject>, Arg 2: {"id":"/home/users/myname/myproject/venv/bin/python","sysPrefix":"/home/users/myname/myproject/venv","envType":"Venv","envName":"venv","envPath":"/home/users/myname/myproject/venv","path":"/home/users/myname/myproject/venv/bin/python","architecture":3,"sysVersion":"3.10.13 (main, Dec 15 2023, 18:32:57) [GCC 11.4.0]","version":{"raw":"3.10.13","major":3,"minor":10,"patch":13,"build":[],"prerelease":["final","0"]},"displayName":"Python 3.10.13 ('venv')","detailedDisplayName":"Python 3.10.13 ('venv': venv)","type":"Virtual"}, Arg 3: {"documentSelector":[{"scheme":"file","language":"python"},{"scheme":"untitled","language":"python"},{"scheme":"vscode-notebook","language":"python"},{"scheme":"vscode-notebook-cell","language":"python"},{"scheme":"vscode-interactive-input","language":"python"}],"synchronize":{"configurationSection":["python","jupyter.runStartupCommands"]},"outputChannel":{"name":"Python Language Server","logLevel":3},"revealOutputChannelOn":4,"initializationOptions":{"experimentationSupport":true,"trustedWorkspaceSupport":true},"middleware":{"serviceContainer":{"container":{"options":{"autoBindInjectable":false,"defaultScope":"Transient","skipBaseClassChecks":true},"id":0,"_bindingDictionary":{"_map":{}},"_snapshots":[],"_middleware":null,"_activations":{"_map":{}},"_deactivations":{"_map":{}},"parent":null,"_metadataReader":{},"_moduleActivationStore":{"_map":{}}}},"serverVersion":"2024.8.2","lastCaptured":{},"nextWindow":0,"eventCount":0,"workspace":{},"connectedPromise":{"scope":null,"_resolved":false,"_rejected":false,"_promise":{}},"notebooks":{},"eventName":"LANGUAGE_SERVER.REQUEST"}}, Return Value: undefined`,
  [Error: The language client requires VS Code version ^1.91.0 but received version 1.89.1
  	at P.checkVersion (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2307252)
  	at new P (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2306957)
  	at Object.createClient (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:52239)
  	at _0x500d80 (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:214309)
  	at async _0x5446db (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:218007)
  	at async _0x1d21da._startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:167298)
  	at async _0x1d21da._createNewRequest (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166823)
  	at async _0x1d21da._enqueueRequestAndWaitForRun (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166027)
  	at async _0x1d21da.startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:165543)
  	at async h.start (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:39659)]
]
2024-11-26 15:57:21.927 [error] [
  'Starting language server, Class name = d, completed in 55ms, has a falsy return value, , Return Value: undefined',
  [Error: The language client requires VS Code version ^1.91.0 but received version 1.89.1
  	at P.checkVersion (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2307252)
  	at new P (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2306957)
  	at Object.createClient (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:52239)
  	at _0x500d80 (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:214309)
  	at async _0x5446db (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:218007)
  	at async _0x1d21da._startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:167298)
  	at async _0x1d21da._createNewRequest (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166823)
  	at async _0x1d21da._enqueueRequestAndWaitForRun (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166027)
  	at async _0x1d21da.startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:165543)
  	at async h.start (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:39659)]
]
2024-11-26 15:57:21.927 [error] [
  `Failed to start language server, Class name = d, completed in 55ms, has a falsy return value, Arg 1: <Uri:/home/users/myname/myproject>, Arg 2: {"id":"/home/users/myname/myproject/venv/bin/python","sysPrefix":"/home/users/myname/myproject/venv","envType":"Venv","envName":"venv","envPath":"/home/users/myname/myproject/venv","path":"/home/users/myname/myproject/venv/bin/python","architecture":3,"sysVersion":"3.10.13 (main, Dec 15 2023, 18:32:57) [GCC 11.4.0]","version":{"raw":"3.10.13","major":3,"minor":10,"patch":13,"build":[],"prerelease":["final","0"]},"displayName":"Python 3.10.13 ('venv')","detailedDisplayName":"Python 3.10.13 ('venv': venv)","type":"Virtual"}, Return Value: undefined`,
  [Error: The language client requires VS Code version ^1.91.0 but received version 1.89.1
  	at P.checkVersion (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2307252)
  	at new P (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2306957)
  	at Object.createClient (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:52239)
  	at _0x500d80 (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:214309)
  	at async _0x5446db (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:218007)
  	at async _0x1d21da._startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:167298)
  	at async _0x1d21da._createNewRequest (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166823)
  	at async _0x1d21da._enqueueRequestAndWaitForRun (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166027)
  	at async _0x1d21da.startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:165543)
  	at async h.start (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:39659)]
]
2024-11-26 15:57:21.928 [error] [
  'Failed to activate a workspace, Class name = v, completed in 721ms, has a falsy return value, Arg 1: <Uri:/home/users/myname/myproject/launch_agent_xray.py>, Arg 2: {"started":1732654640994}, Return Value: undefined',
  [Error: The language client requires VS Code version ^1.91.0 but received version 1.89.1
  	at P.checkVersion (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2307252)
  	at new P (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2306957)
  	at Object.createClient (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:52239)
  	at _0x500d80 (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:214309)
  	at async _0x5446db (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:218007)
  	at async _0x1d21da._startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:167298)
  	at async _0x1d21da._createNewRequest (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166823)
  	at async _0x1d21da._enqueueRequestAndWaitForRun (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166027)
  	at async _0x1d21da.startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:165543)
  	at async h.start (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:39659)]
]
2024-11-26 15:57:21.928 [error] Failure during activation. [Error: The language client requires VS Code version ^1.91.0 but received version 1.89.1
	at P.checkVersion (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2307252)
	at new P (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2306957)
	at Object.createClient (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:52239)
	at _0x500d80 (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:214309)
	at async _0x5446db (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:218007)
	at async _0x1d21da._startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:167298)
	at async _0x1d21da._createNewRequest (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166823)
	at async _0x1d21da._enqueueRequestAndWaitForRun (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166027)
	at async _0x1d21da.startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:165543)
	at async h.start (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:39659)]
2024-11-26 15:57:21.928 [error] sendStartupTelemetry() failed. [Error: The language client requires VS Code version ^1.91.0 but received version 1.89.1
	at P.checkVersion (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2307252)
	at new P (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:2306957)
	at Object.createClient (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:52239)
	at _0x500d80 (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:214309)
	at async _0x5446db (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:218007)
	at async _0x1d21da._startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:167298)
	at async _0x1d21da._createNewRequest (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166823)
	at async _0x1d21da._enqueueRequestAndWaitForRun (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:166027)
	at async _0x1d21da.startClient (/home/users/myname/.vscode-server/extensions/ms-python.vscode-pylance-2024.8.2/dist/extension.bundle.js:1:165543)
	at async h.start (/home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/out/client/extension.js:2:39659)]
2024-11-26 15:57:22.045 [info] > . ./venv/bin/activate && echo 'e8b39361-0157-4923-80e1-22d70d46dee6' && python ~/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/python_files/printEnvVariables.py
2024-11-26 15:57:22.045 [info] shell: bash
2024-11-26 15:57:22.115 [info] > /bin/python3 ~/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/python_files/printEnvVariables.py
2024-11-26 15:57:22.116 [info] shell: bash
2024-11-26 15:57:22.183 [info] Setting environment variable VIRTUAL_ENV in collection to /home/users/myname/myproject/venv {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-11-26 15:57:22.183 [info] Setting environment variable VIRTUAL_ENV_PROMPT in collection to (venv)  {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-11-26 15:57:22.183 [info] Prepending environment variable PS1 in collection with (venv)  {"applyAtShellIntegration":true,"applyAtProcessCreation":false}
2024-11-26 15:57:22.183 [info] Prepending environment variable PATH in collection with /home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/python_files/deactivate/bash:/home/users/myname/myproject/venv/bin: {"applyAtShellIntegration":true,"applyAtProcessCreation":true}
2024-11-26 15:57:22.184 [info] Send text to terminal: /bin/python3 /home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/python_files/printEnvVariablesToFile.py /home/users/myname/.vscode-server/extensions/ms-python.python-2024.14.0-linux-x64/python_files/deactivate/bash/envVars.txt

[rchiodo]

The error is this one:

The language client requires VS Code version ^1.91.0 but received version 1.89.1

You're using an older version of VS code. You can't install the latest pylance into it.

[rchiodo]

How did you install pylance? The extension tab in VS code should only show versions that are supported.

[xhluca]

I'm using the "Extensions" tab, so not sure why vscode allowed me to install that. I will try to update vscode

[rchiodo]

It could be the remote machine needs to be updated. The extensions actually run on the remote box in SSH. I thought the remote SSH extension auto updated, but I could be wrong.

[xhluca]

How can I check and update the version?

[rchiodo]

I don't use SSH myself, but in WSL it gets updated by just running code.

According to this, the Remote SSH extension is supposed to do it for you.
https://code.visualstudio.com/docs/remote/ssh

So maybe your local version is out of date too.

[rchiodo]

Might be related to permissions though:
https://code.visualstudio.com/docs/remote/faq#_what-are-the-connectivity-requirements-for-vs-code-server