AstroNvim
astrocommunity.pack.cs-omnisharp lsp not working
The omnisharp lsp is not working on neovim 0.11.4
neovim
NVIM v0.11.4
Build type: RelWithDebInfo
LuaJIT 2.1.1753364724
Run "nvim -V1 -v" for more info
dotnet
.NET SDK:
Version: 9.0.110
Commit: 999243871a
Workload version: 9.0.100-manifests.3277c30b
MSBuild version: 17.12.44+999243871
Runtime Environment:
OS Name: arch
OS Version:
OS Platform: Linux
RID: arch-x64
Base Path: /usr/share/dotnet/sdk/9.0.110/
.NET workloads installed:
There are no installed workloads to display.
Configured to use loose manifests when installing new manifests.
Host:
Version: 9.0.8
Architecture: x64
Commit: a1e39f97e5
.NET SDKs installed:
9.0.110 [/usr/share/dotnet/sdk]
.NET runtimes installed:
Microsoft.AspNetCore.App 9.0.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 9.0.9 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
Other architectures found:
None
Environment variables:
Not set
global.json file:
Not found
Learn more:
https://aka.ms/dotnet/info
Download .NET:
https://aka.ms/dotnet/download
There have been some upstream updates with some fixes like https://github.com/neovim/nvim-lspconfig/commit/dc64b7d9bb0d5a3c365bbca09b991591ff5a5156 that could cause an issue
@Uzaaft The error doesn't appear, but the omnisharp lsp is not running.
Before LazyVim 15.x, there is the same problem. Afterwards, I've upgraded my LazyVim to 15.x, and the Omnisharp lsp runs well. Please check this.
LspInfo
==============================================================================
vim.lsp: ✅
- LSP log level : WARN
- Log path: /home/jame/.local/state/astronvim/lsp.log
- Log size: 0 KB
vim.lsp: Active Clients ~
- null-ls (id: 2)
- Version: ? (no serverInfo.version response)
- Root directory: ~/Desktop/coding/year4
- Command: <function @/home/jame/.local/share/astronvim/lazy/none-ls.nvim/lua/null-ls/rpc.lua:61>
- Settings: {}
- Attached buffers: 1
vim.lsp: Enabled Configurations ~
vim.lsp: File Watcher ~
- file watching "(workspace/didChangeWatchedFiles)" disabled on all clients
vim.lsp: Position Encodings ~
- No buffers contain mixed position encodings
LspLog
There is empty in LspLog.
Not enough info to see what's wrong. Are there no other logs or more error messages?
Maybe I can give some more information on this as I am facing the same issue. First of all the full warning message when opening a .cs file:
...m/4611/usr/share/nvim/runtime/lua/vim/lsp/_transport.lua:68: Spawning language server with cmd: `{ "-z", "--hostPID", "13814", "DotNet:enablePackageRestore=false", "--encoding", "utf-8", "--languageserver", "Sdk:IncludePrereleases=true", "FormattingOptions:EnableEditorConfigSupport=true" }` failed. The language server is either not installed, missing from PATH, or not executable.
It seems to me the first entry to the command table is missing, which is the actual name "Omnisharp" (or the path, i don't know). This is only a guess of course, based on things I saw in other places, but I don't really understand the inner workings here.
Other information which might help:
- the actual omnisharp binary is in PascalCase as opposed to most other LSPs
~/.local/share/nvim/mason/bin$ ll
total 15
drwxr-xr-x 2 user user 4096 Dez 15 02:41 ./
drwxr-xr-x 8 user user 4096 Mai 10 2025 ../
lrwxrwxrwx 1 user user 49 Jun 13 2025 bash-debug-adapter -> ../packages/bash-debug-adapter/bash-debug-adapter*
lrwxrwxrwx 1 user user 71 Jun 13 2025 bash-language-server -> ../packages/bash-language-server/node_modules/.bin/bash-language-server*
lrwxrwxrwx 1 user user 29 Dez 13 17:48 codelldb -> ../packages/codelldb/codelldb*
lrwxrwxrwx 1 user user 31 Dez 14 17:51 csharpier -> ../packages/csharpier/csharpier*
lrwxrwxrwx 1 user user 23 Dez 13 17:48 jdtls -> ../packages/jdtls/jdtls*
lrwxrwxrwx 1 user user 69 Mai 22 2025 lemminx -> /home/user/.local/share/nvim/mason/packages/lemminx/lemminx-linux*
lrwxrwxrwx 1 user user 51 Dez 13 17:48 lua-language-server -> ../packages/lua-language-server/lua-language-server*
lrwxrwxrwx 1 user user 39 Dez 14 17:36 marksman -> ../packages/marksman/marksman-linux-x64*
lrwxrwxrwx 1 user user 33 Dez 13 20:47 netcoredbg -> ../packages/netcoredbg/netcoredbg*
lrwxrwxrwx 1 user user 31 Dez 14 17:59 OmniSharp -> ../packages/omnisharp/OmniSharp*
lrwxrwxrwx 1 user user 49 Nov 1 19:27 prettierd -> ../packages/prettierd/node_modules/.bin/prettierd*
lrwxrwxrwx 1 user user 25 Nov 1 19:26 selene -> ../packages/selene/selene*
lrwxrwxrwx 1 user user 33 Nov 1 19:26 shellcheck -> ../packages/shellcheck/shellcheck*
lrwxrwxrwx 1 user user 43 Nov 1 19:26 shfmt -> ../packages/shfmt/shfmt_v3.12.0_linux_amd64*
lrwxrwxrwx 1 user user 25 Nov 1 19:26 stylua -> ../packages/stylua/stylua*
lrwxrwxrwx 1 user user 36 Jun 10 2025 taplo -> ../packages/taplo/taplo-linux-x86_64*
lrwxrwxrwx 1 user user 49 Dez 14 17:36 tree-sitter -> ../packages/tree-sitter-cli/tree-sitter-linux-x64*
-
I tried creating a symlink, assuming it searches by the wrong name because of this (https://github.com/neovim/nvim-lspconfig/commit/dc64b7d9bb0d5a3c365bbca09b991591ff5a5156), but the following also didn't change anything:
lrwxrwxrwx 1 user user 9 Dez 15 02:41 omnisharp -> OmniSharp* -
The installation process worked flawlessly and I can also execute the LSP binary manually, so the issue should just be in the way the LSP is started. I tried to read further into the code to debug this myself, but I didn't find where the Lsp command table (the one from the warning) is created and based on what.
-
:MasonLog and :LspLog don't show anything regarding an attempt to start omnisharp or something related
-
My installation:
- NVIM v0.11.5 Build type: RelWithDebInfo LuaJIT 2.1.1741730670
- dotnet --version 8.0.122
- this is my full config (a slight mess) on top of which I just added this line to the community.lua file:
{ import = "astrocommunity.pack.cs-omnisharp" }, -- requires dotnet (must be the APT version)
Hopefully that can be of help here. Please let me know if I can help out in any other way.
