PlatformNotSupported while launching zed in VNC session

[serpent7776]

Summary

Zed crashes when launched in VNC session, works fine when launched directly in X session.

Description

Steps to trigger the problem:

1. Start the VNC server with tigervncserver
2. Connect to the server using vncviewer
3. Launch zed

Actual Behavior:

2025-05-19T11:43:43+02:00 ERROR [zed::reliability] {
  "thread": "main",
  "payload": "called `Result::unwrap()` on an `Err` value: PlatformNotSupported",
  "location_data": {
    "file": "crates/gpui/src/platform/blade/blade_renderer.rs",
    "line": 345
  },
  "backtrace": [
    "zed::reliability::init_panic_hook::{{closure}}::hd6958bb9d75896d2+149038150",
    "std::panicking::rust_panic_with_hook::h541791bcc774ef34+121500819",
    "std::panicking::begin_panic_handler::{{closure}}::h6479a2f0137c7d19+121500042",
    "std::sys::backtrace::__rust_end_short_backtrace::ha04e7c0fc61ded91+121493561",
    "rust_begin_unwind+121499181",
    "core::panicking::panic_fmt::h5764ee7030b7a73d+8894000",
    "core::result::unwrap_failed::h3ff7104a9ace307a+8895078",
    "gpui::platform::blade::blade_renderer::BladeRenderer::new::h68c1f1c6fded2ce0+70806628",
    "<gpui::platform::linux::x11::client::X11Client as gpui::platform::linux::platform::LinuxClient>::open_window::h9a8fbadee3559b62+70682866",
    "gpui::platform::linux::platform::<impl gpui::platform::Platform for P>::open_window::h577093ca30b52f0d+70300314",
    "gpui::window::Window::new::hc927845c1d617aff+70961961",
    "gpui::app::async_context::AsyncApp::open_window::hd15989805215bb40+141250113",
    "workspace::Workspace::new_local::{{closure}}::{{closure}}::h27bc50c40a739bfc+142779308",
    "gpui::app::App::spawn::{{closure}}::h6afadddb64ab99a0+141386456",
    "async_task::raw::RawTask<F,T,S,M>::run::h3ec8a38c548c5a0d+140477396",
    "<gpui::platform::linux::x11::client::X11Client as gpui::platform::linux::platform::LinuxClient>::run::hd70657b506b0ca85+70702491",
    "gpui::platform::linux::platform::<impl gpui::platform::Platform for P>::run::h67824e5880281d0e+70290813",
    "gpui::app::Application::run::h2295b3aa488b367b+146001716",
    "zed::main::h779a51b726c887e7+148395077",
    "std::sys::backtrace::__rust_begin_short_backtrace::h9a92f2d035749930+149725251",
    "std::rt::lang_start::{{closure}}::h005b3ad262729908+148807881",
    "std::rt::lang_start_internal::h15895544e2012228+121424401",
    "main+148414252",
    "__libc_start_call_main+46384147389840",
    "__libc_start_main_impl+46384147390016",
    "_start+11256046"
  ],
  "app_version": "0.186.9",
  "app_commit_sha": "5b61a59e6cd533bc8dec94fbd3738bec2b0d042a",
  "release_channel": "stable",
  "target": "x86_64-unknown-linux-gnu",
  "os_name": "Linux X11",
  "os_version": "ubuntu 22.04",
  "architecture": "x86_64",
  "panicked_on": 1747647823563,
  "system_id": "[redacted]",
  "installation_id": "[redacted]",
  "session_id": "[redacted]"
}

Expected Behavior:
No crash.

Possibly related:
#25899

Zed Version and System Specs

Zed: v0.186.9 (Zed)
OS: Linux X11 ubuntu 22.04
Memory: 62.5 GiB
Architecture: x86_64
GPU: Intel(R) Xe Graphics (TGL GT2) || Intel open-source Mesa driver || Mesa 23.2.1-1ubuntu3.1~22.04.3

If applicable, attach your ~/Library/Logs/Zed/Zed.log file to this issue.

Zed.log

Parts that seem relevant:

2025-05-16T13:55:36+02:00 INFO  [zed] ========== starting zed ==========
2025-05-16T13:55:37+02:00 ERROR [gpui::platform::linux::x11::client] Found no xinput mouse pointers.
2025-05-16T13:55:37+02:00 INFO  [gpui::platform::linux::x11::client] Compositor detection: _NET_WM_CM_S?=false, _NET_WM_CM_OWNER=false, _NET_SUPPORTING_WM_CHECK=true
2025-05-16T13:55:37+02:00 INFO  [gpui::platform::linux::x11::client] x11: compositor present: true, gtk_frame_extents_supported: false
2025-05-16T13:55:37+02:00 INFO  [blade_graphics::hal::init] Presentation support: "VK_KHR_wayland_surface"
2025-05-16T13:55:37+02:00 INFO  [blade_graphics::hal::init] Presentation support: "VK_KHR_xcb_surface"
2025-05-16T13:55:37+02:00 INFO  [blade_graphics::hal::init] Presentation support: "VK_KHR_xlib_surface"
2025-05-16T13:55:37+02:00 INFO  [blade_graphics::hal::init] Enabling color space support
2025-05-16T13:55:37+02:00 INFO  [blade_graphics::hal::init] Adapter: "Intel(R) Xe Graphics (TGL GT2)"
2025-05-16T13:55:37+02:00 INFO  [blade_graphics::hal::init] No ray tracing extensions are supported
...
2025-05-16T13:55:37+02:00 INFO  [gpui::platform::linux::platform] activate is not implemented on Linux, ignoring the call
...
2025-05-16T13:55:37+02:00 INFO  [gpui::platform::linux::x11::window] Using Visual { id: 77, colormap: 0, depth: 32 }
2025-05-16T13:55:37+02:00 INFO  [gpui::platform::linux::x11::window] Creating colormap 37748739
...
2025-05-16T13:55:37+02:00 WARN  [blade_graphics::hal::surface] Rejected for not presenting to the window surface
...
2025-05-16T13:55:37+02:00 ERROR [zed::reliability] {
  "thread": "main",
  "payload": "called `Result::unwrap()` on an `Err` value: PlatformNotSupported",
  "location_data": {
    "file": "crates/gpui/src/platform/blade/blade_renderer.rs",
    "line": 345
  },
  "backtrace": [
    "zed::reliability::init_panic_hook::{{closure}}::hd6958bb9d75896d2+149038150",
    "std::panicking::rust_panic_with_hook::h541791bcc774ef34+121500819",
    "std::panicking::begin_panic_handler::{{closure}}::h6479a2f0137c7d19+121500042",
    "std::sys::backtrace::__rust_end_short_backtrace::ha04e7c0fc61ded91+121493561",
    "rust_begin_unwind+121499181",
    "core::panicking::panic_fmt::h5764ee7030b7a73d+8894000",
    "core::result::unwrap_failed::h3ff7104a9ace307a+8895078",
    "gpui::platform::blade::blade_renderer::BladeRenderer::new::h68c1f1c6fded2ce0+70806628",
    "<gpui::platform::linux::x11::client::X11Client as gpui::platform::linux::platform::LinuxClient>::open_window::h9a8fbadee3559b62+70682866",
    "gpui::platform::linux::platform::<impl gpui::platform::Platform for P>::open_window::h577093ca30b52f0d+70300314",
    "gpui::window::Window::new::hc927845c1d617aff+70961961",
    "gpui::app::async_context::AsyncApp::open_window::hd15989805215bb40+141250113",
    "workspace::Workspace::new_local::{{closure}}::{{closure}}::h27bc50c40a739bfc+142779308",
    "gpui::app::App::spawn::{{closure}}::h6afadddb64ab99a0+141386456",
    "async_task::raw::RawTask<F,T,S,M>::run::h3ec8a38c548c5a0d+140477396",
    "<gpui::platform::linux::x11::client::X11Client as gpui::platform::linux::platform::LinuxClient>::run::hd70657b506b0ca85+70702491",
    "gpui::platform::linux::platform::<impl gpui::platform::Platform for P>::run::h67824e5880281d0e+70290813",
    "gpui::app::Application::run::h2295b3aa488b367b+146001716",
    "zed::main::h779a51b726c887e7+148395077",
    "std::sys::backtrace::__rust_begin_short_backtrace::h9a92f2d035749930+149725251",
    "std::rt::lang_start::{{closure}}::h005b3ad262729908+148807881",
    "std::rt::lang_start_internal::h15895544e2012228+121424401",
    "main+148414252",
    "__libc_start_call_main+45143021215120",
    "__libc_start_main_impl+45143021215296",
    "_start+11256046"
  ],
  "app_version": "0.186.9",
  "app_commit_sha": "5b61a59e6cd533bc8dec94fbd3738bec2b0d042a",
  "release_channel": "stable",
  "target": "x86_64-unknown-linux-gnu",
  "os_name": "Linux X11",
  "os_version": "ubuntu 22.04",
  "architecture": "x86_64",
  "panicked_on": 1747396537215,
  "system_id": "356c6a04-33c4-45b3-8be1-2178f469d52d",
  "installation_id": "c064d0d1-dbfc-4b81-8658-3ac6ac406320",
  "session_id": "815bdb1a-75ee-4e21-a5e4-6e97842434f8"
}

[WXZhao7]

I meet the similar problem with xfce + tigerVNC.

> zeditor --version
Zed 0.190.6 – /usr/lib/zed/zed-editor
> zeditor --foreground
2025-06-16T20:39:15+08:00 INFO  [zed] ========== starting zed ==========
2025-06-16T20:39:15+08:00 ERROR [gpui::platform::linux::x11::client] Found no xinput mouse pointers.
2025-06-16T20:39:15+08:00 INFO  [gpui::platform::linux::x11::client] Compositor detection: _NET_WM_CM_S?=false, _NET_WM_CM_OWNER=false, _NET_SUPPORTING_WM_CHECK=true
2025-06-16T20:39:15+08:00 INFO  [gpui::platform::linux::x11::client] x11: compositor present: true, gtk_frame_extents_supported: false
2025-06-16T20:39:15+08:00 INFO  [blade_graphics::hal::init] Presentation support: "VK_KHR_wayland_surface"
2025-06-16T20:39:15+08:00 INFO  [blade_graphics::hal::init] Presentation support: "VK_KHR_xcb_surface"
2025-06-16T20:39:15+08:00 INFO  [blade_graphics::hal::init] Presentation support: "VK_KHR_xlib_surface"
2025-06-16T20:39:15+08:00 INFO  [blade_graphics::hal::init] Enabling Vulkan Portability
2025-06-16T20:39:15+08:00 INFO  [blade_graphics::hal::init] Enabling color space support

thread 'main' panicked at crates/gpui/src/platform/linux/x11/client.rs:377:47:
Unable to init GPU context: Platform(Init(ERROR_INCOMPATIBLE_DRIVER))
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[schrummy14]

I was able to get zed to start on vnc (tiger + xfce) but I am not able to open files.
I am getting the error:
2025-09-04T20:15:29+00:00 WARN [util] ZBus Error: I/O error: No such file or directory (os error 2)

[schrummy14]

Hello,
I was able to get everything running.

I fixed the zbus issue by calling: dbus-launch /opt/zed/zed

[serpent7776]

How did you manage to start zed on vnc? It still doesn't work for me.

[schrummy14]

Hello,
Sorry, I didn't see your reply.

We are using an older version of TigerVNC (1.10.1)...
After mapping local and config directories, we run:

export ZED_ALLOW_EMULATED_GPU=1
dbus-launch $PATH_TO_ZED/zed --user-data-dir "$DATA_DIR/config/zed"

Packages for rocky 9 come from:
https://github.com/nimbix/jarvice-desktop/blob/master/nimbix_desktop/install-rhel-desktop.sh