VR: Difference between revisions - Official NixOS Wiki

(3 intermediate revisions by 2 users not shown)

Line 81:

Note: OpenComposite is unmaintained. We recommend using [https://github.com/Supreeeme/xrizer xrizer] instead.

[https://gitlab.com/znixian/OpenOVR OpenComposite] is a compatibility layer for running OpenVR applications on an OpenXR runtime like Monado. It is comparable to tools like DXVK or vkd3d, but for translating OpenVR calls to OpenXR.

Line 215:

Line 217:

By modifying the bubblewrap binary used for running Steam, you can allow processes in that FHS environment to acquire capabilities. This removes the need for patching the kernel directly.

By modifying the bubblewrap binary used for running Steam, you can allow processes in that FHS environment to acquire capabilities. This removes the need for patching the kernel directly. This may become unnecessary if [https://github.com/containers/bubblewrap/issues/653 bubblewrap #653] is merged and the flag is added to Steam's tooling.

'''As of 2026-05, this may no longer be viable:''' Steam now aggressively restores its own pressure vessel srt-bwrap on startup, however deleting <code>~/.local/share/Steam/</code> has been [https://discourse.nixos.org/t/steam-fails-to-launch-with-patched-bwrap/75167 reported] to help.

</translate>

Line 237:

Line 241:

};

}}

{{file~~|/etc/nixos/bwrap.patch|diff~~|3=diff --git a/bubblewrap.c b/bubblewrap.c

{{file|3=diff --git a/bubblewrap.c b/bubblewrap.c

index ~~e05f697~~..~~504512a~~ 100644

index f8728c7..42cfe2e 100644

--- a/bubblewrap.c

+++ b/bubblewrap.c

@@ -~~791~~,13 +~~791~~,6 @@ acquire_privs (void)

@@ -876,13 +876,6 @@ acquire_privs (void)

/* ~~Historically we supported this, but now we~~ only ~~do user namespaces~~ */

/* Keep only the required capabilities for setup */

~~die~~ (~~"setuid use of bubblewrap is not supported"~~);

set_required_caps ();

}

- else if (real_uid != 0 && has_caps ())

Line 255:

Line 259:

{

/* If our uid is 0, default to inheriting all caps; the caller

|name=|lang=}}

|name=bwrap.patch|lang=diff}}

Line 263:

Line 267:

Steam will periodically replace this modification with its own binary when steam-runtime updates, so you may need to re-apply this change if it breaks.

=== Setting SteamVR as default OpenXR runtime ===

To set SteamVR as the default OpenXR runtime, you have to add the following snippet to your Home Manager config:

{{file|/etc/nixos/configuration.nix|nix|3=xdg.configFile."openxr/1/active_runtime.json".text = ''

{

"file_format_version": "1.0.0",

"runtime": {

"VALVE_runtime_is_steamvr": true,

"library_path": "${config.home.homeDirectory}/.local/share/Steam/steamapps/common/SteamVR/bin/linux64/vrclient.so",

"name": "SteamVR"

}

'';

}}

== wlx-overlay-s ==

@@ Line 81: / Line 81: @@
 <!--T:12-->
+Note: OpenComposite is unmaintained. We recommend using [https://github.com/Supreeeme/xrizer xrizer] instead.
 [https://gitlab.com/znixian/OpenOVR OpenComposite] is a compatibility layer for running OpenVR applications on an OpenXR runtime like Monado. It is comparable to tools like DXVK or vkd3d, but for translating OpenVR calls to OpenXR.
@@ Line 215: / Line 217: @@
 <!--T:44-->
-By modifying the bubblewrap binary used for running Steam, you can allow processes in that FHS environment to acquire capabilities. This removes the need for patching the kernel directly.
+By modifying the bubblewrap binary used for running Steam, you can allow processes in that FHS environment to acquire capabilities. This removes the need for patching the kernel directly. This may become unnecessary if [https://github.com/containers/bubblewrap/issues/653 bubblewrap #653] is merged and the flag is added to Steam's tooling.
+'''As of 2026-05, this may no longer be viable:''' Steam now aggressively restores its own pressure vessel srt-bwrap on startup, however deleting <code>~/.local/share/Steam/</code> has been [https://discourse.nixos.org/t/steam-fails-to-launch-with-patched-bwrap/75167 reported] to help.
 </translate>
@@ Line 237: / Line 241: @@
 };
 }}
-{{file|/etc/nixos/bwrap.patch|diff|3=diff --git a/bubblewrap.c b/bubblewrap.c
+{{file|3=diff --git a/bubblewrap.c b/bubblewrap.c
-index e05f697..504512a 100644
+index f8728c7..42cfe2e 100644
 --- a/bubblewrap.c
 +++ b/bubblewrap.c
-@@ -791,13 +791,6 @@ acquire_privs (void)
+@@ -876,13 +876,6 @@ acquire_privs (void)
-        /* Historically we supported this, but now we only do user namespaces */
+        /* Keep only the required capabilities for setup */
-        die ("setuid use of bubblewrap is not supported");
+        set_required_caps ();
       }
 -  else if (real_uid != 0 && has_caps ())
@@ Line 255: / Line 259: @@
       {
         /* If our uid is 0, default to inheriting all caps; the caller
-|name=|lang=}}
+|name=bwrap.patch|lang=diff}}
 <translate>
@@ Line 263: / Line 267: @@
 <!--T:47-->
 Steam will periodically replace this modification with its own binary when steam-runtime updates, so you may need to re-apply this change if it breaks.
+=== Setting SteamVR as default OpenXR runtime ===
+To set SteamVR as the default OpenXR runtime, you have to add the following snippet to your Home Manager config:
+{{file|/etc/nixos/configuration.nix|nix|3=xdg.configFile."openxr/1/active_runtime.json".text = ''
+  {
+     "file_format_version": "1.0.0",
+      "runtime": {
+      "VALVE_runtime_is_steamvr": true,
+      "library_path": "${config.home.homeDirectory}/.local/share/Steam/steamapps/common/SteamVR/bin/linux64/vrclient.so",
+      "name": "SteamVR"
+      }
+  }
+  '';
+}}
 == wlx-overlay-s == <!--T:31-->