via ssh/X11/XMng, failing to start on ubuntu with "[xcb] Aborting, sorry about that."

[pieterbreed]

Issue Type: Bug

I'm using X11 forwarding via putty. On the Main desktop (Windows 10) I have Xmng running for X11 emulation and putty set up properly. My other GTK apps and emacs works just fine. I installed Visual Studio code via snap, and on starting it fails with this output:

(I suspect the diagnostics at the end is of my Visual Studio Code that runs on Windows 10 natively, which I merely used to log this bug report...)

$ /snap/bin/code --verbose --log trace
/usr/lib/x86_64-linux-gnu/gio/modules/libgvfsdbus.so: undefined symbol: g_date_time_format_iso8601
Failed to load module: /usr/lib/x86_64-linux-gnu/gio/modules/libgvfsdbus.so
(code:4986): Gtk-WARNING **: 18:07:05.677: Theme parsing error: gtk.css:1521:23: 'font-feature-settings' is not a valid property name
(code:4986): Gtk-WARNING **: 18:07:05.680: Theme parsing error: gtk.css:3460:25: 'font-feature-settings' is not a valid property name
(code:4986): Gtk-WARNING **: 18:07:05.681: Theme parsing error: gtk.css:3922:23: 'font-feature-settings' is not a valid property name
[main 2020-09-01T16:07:05.841Z] Starting VS Code
[main 2020-09-01T16:07:05.842Z] from: /snap/code/42/usr/share/code/resources/app
[main 2020-09-01T16:07:05.842Z] args: {
  _: [],
  diff: false,
  add: false,
  goto: false,
  'new-window': false,
  'reuse-window': false,
  wait: false,
  help: false,
  'list-extensions': false,
  'show-versions': false,
  version: false,
  verbose: true,
  log: 'trace',
  status: false,
  'prof-startup': false,
  'disable-extensions': false,
  'disable-gpu': false,
  telemetry: false,
  logExtensionHostCommunication: false,
  'skip-release-notes': false,
  'disable-restore-windows': false,
  'disable-telemetry': false,
  'disable-updates': false,
  'disable-crash-reporter': false,
  'disable-user-env-probe': false,
  'skip-add-to-recently-opened': false,
  'unity-launch': false,
  'open-url': false,
  'file-write': false,
  'file-chmod': false,
  'driver-verbose': false,
  force: false,
  'do-not-sync': false,
  trace: false,
  'force-user-env': false,
  'open-devtools': false,
  'no-proxy-server': false,
  nolazy: false,
  'force-renderer-accessibility': false,
  'ignore-certificate-errors': false,
  'allow-insecure-localhost': false
}
[main 2020-09-01T16:07:05.843Z] Resolving machine identifier...
[main 2020-09-01T16:07:05.844Z] Resolved machine identifier: ddb3fa4e0cc4dd171c4f498f8567b104ecd441c2573bd12f5d039195a68246a7
[main 2020-09-01T16:07:05.861Z] update#setState idle
[main 2020-09-01T16:07:05.867Z] [storage state.vscdb] open(/home/pieter/.config/Code/User/globalStorage/state.vscdb, retryOnBusy: true)
[main 2020-09-01T16:07:05.868Z] lifecycle (main): phase changed (value: 2)
[main 2020-09-01T16:07:05.868Z] windowsManager#open
[main 2020-09-01T16:07:05.870Z] window#validateWindowState: validating window state on 1 display(s) {
  width: 1024,
  height: 768,
  mode: 1,
  x: 2368,
  y: 156,
  hasDefaultState: true
}
[main 2020-09-01T16:07:05.870Z] window#validateWindowState: 1 monitor working area { x: 0, y: 0, width: 5760, height: 1080 }
[main 2020-09-01T16:07:05.871Z] window#ctor: using window state {
  width: 1024,
  height: 768,
  mode: 1,
  x: 2368,
  y: 156,
  hasDefaultState: true
}
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
code --verbose --log --no-sandbox trace: ../../src/xcb_io.c:274: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
 

VS Code version: Code 1.48.2 (a0479759d6e9ea56afa657e454193f72aef85bd0, 2020-08-25T10:13:11.295Z)
OS version: Windows_NT x64 10.0.19042

<details>
<summary>System Info</summary>

|Item|Value|
|---|---|
|CPUs|AMD Ryzen 7 1800X Eight-Core Processor          (16 x 3850)|
|GPU Status|2d_canvas: enabled<br>flash_3d: enabled<br>flash_stage3d: enabled<br>flash_stage3d_baseline: enabled<br>gpu_compositing: enabled<br>multiple_raster_threads: enabled_on<br>oop_rasterization: disabled_off<br>protected_video_decode: unavailable_off<br>rasterization: enabled<br>skia_renderer: disabled_off_ok<br>video_decode: enabled<br>viz_display_compositor: enabled_on<br>viz_hit_test_surface_layer: disabled_off_ok<br>webgl: enabled<br>webgl2: enabled|
|Load (avg)|undefined|
|Memory (System)|15.93GB (7.14GB free)|
|Process Argv||
|Screen Reader|no|
|VM|0%|
</details><details><summary>Extensions (3)</summary>

Extension|Author (truncated)|Version
---|---|---
calva|bet|2.0.124
clj-kondo|bor|2020.7.291
remote-wsl|ms-|0.44.5


</details>
<!-- generated by issue reporter -->

[deepak1556]

/duplicate #3451

You can use the workaround mentioned in that issue #3451 (comment)