h264_vaapi on i7-1065G7 CPU

[dset0x]

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Hello,

I've been trying to get hardware accelerated streaming working on my i7-1065G7 iGPU (Iris Plus Graphics G7) with Void Linux. The laptop has an nvidia dGPU that I am not using for anything. I am assuming it is possible because:

libva info: VA-API version 1.22.0
libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_22
libva info: va_openDriver() returns 0
      VAProfileH264Main               :	VAEntrypointVLD
      VAProfileH264Main               :	VAEntrypointEncSliceLP
      VAProfileH264High               :	VAEntrypointVLD
      VAProfileH264High               :	VAEntrypointEncSliceLP
      VAProfileH264ConstrainedBaseline:	VAEntrypointVLD
      VAProfileH264ConstrainedBaseline:	VAEntrypointEncSliceLP

However, sunshine complains that it "Couldn't make current display":

[2025-08-06 17:54:58.845]: Info: Screencasting with X11
[2025-08-06 17:54:58.846]: Info: Creating encoder [h264_vaapi]
[2025-08-06 17:54:58.846]: Info: Color coding: SDR (Rec. 601)
[2025-08-06 17:54:58.846]: Info: Color depth: 8-bit
[2025-08-06 17:54:58.846]: Info: Color range: JPEG
[2025-08-06 17:54:58.850]: Debug: EGL: [Mesa Project]: version [1.5]
[2025-08-06 17:54:58.851]: Debug: API's supported: [OpenGL OpenGL_ES ]
[2025-08-06 17:54:58.851]: Error: Couldn't make current display
[2025-08-06 17:54:58.853]: Info: Creating encoder [h264_vaapi]
[2025-08-06 17:54:58.853]: Info: Color coding: SDR (Rec. 601)
[2025-08-06 17:54:58.853]: Info: Color depth: 8-bit
[2025-08-06 17:54:58.853]: Info: Color range: JPEG
[2025-08-06 17:54:58.857]: Debug: EGL: [Mesa Project]: version [1.5]
[2025-08-06 17:54:58.857]: Debug: API's supported: [OpenGL OpenGL_ES ]
[2025-08-06 17:54:58.858]: Error: Couldn't make current display
[2025-08-06 17:54:58.859]: Info: Encoder [vaapi] failed
[2025-08-06 17:54:58.859]: Info: Trying encoder [software]
[2025-08-06 17:54:58.859]: Info: Screencasting with X11
[2025-08-06 17:54:58.859]: Info: Creating encoder [libx264]

Would it be possible to get some pointers here perhaps? Thanks!