Can't receive video

[Lqm1]

I cannot receive the image as shown in the attached image.
The mouse and keyboard are working fine, and audio is being received.
I can't find anything suspicious in the log.

(Client Screenshot)

[2025-11-11 23:02:57.424]: Info: Starting async encoder teardown
[2025-11-11 23:02:57.446]: Info: Async encoder teardown complete
[2025-11-11 23:02:57.481]: Info: Session pausing for app [Desktop].
[2025-11-11 23:03:09.070]: Info: Display mode for client [Legacy Moonlight Client] requested to [1920x1080x60]
[2025-11-11 23:03:09.207]: Info: Client Requested bitrate is [20000kbps]
[2025-11-11 23:03:09.207]: Info: Host Streaming bitrate is [20000kbps]
[2025-11-11 23:03:09.207]: Info: New streaming session started [active sessions: 1]
[2025-11-11 23:03:09.511]: Info: nvprefs: No need to modify application profile settings
[2025-11-11 23:03:09.511]: Info: nvprefs: No need to modify global profile settings
[2025-11-11 23:03:09.522]: Info: Session resuming for app [Desktop].
[2025-11-11 23:03:09.531]: Info: CLIENT CONNECTED
[2025-11-11 23:03:09.714]: Info: Steam audio drivers not found. This is expected if you don't have Steam installed.
[2025-11-11 23:03:10.421]: Info: Selected audio sink: {0.0.0.00000000}.{fd87482f-8718-4b1a-adca-748b8b5ac305}
[2025-11-11 23:03:10.424]: Info: Audio mixer format is 32-bit, 48000 Hz, no resampling needed
[2025-11-11 23:03:10.429]: Info: Audio capture format is [F32 48000 2.0]
[2025-11-11 23:03:10.430]: Info: Opus initialized: 48 kHz, 2 channels, 512 kbps (total), LOWDELAY
[2025-11-11 23:03:10.545]: Info: 
Device Description : NVIDIA GeForce RTX 3060
Device Vendor ID   : 0x000010DE
Device Device ID   : 0x00002487
Device Video Mem   : 12110 MiB
Device Sys Mem     : 0 MiB
Share Sys Mem      : 8181 MiB
Feature Level      : 0x0000B100
Capture size       : 1280x720
Offset             : 1280x0
Virtual Desktop    : 2560x800
[2025-11-11 23:03:10.545]: Info: Active GPU has HAGS enabled
[2025-11-11 23:03:10.545]: Info: Using realtime GPU priority
[2025-11-11 23:03:10.545]: Info: 
Colorspace         : DXGI_COLOR_SPACE_RGB_FULL_G22_NONE_P709
Bits Per Color     : 8
Red Primary        : [0.639648,0.330078]
Green Primary      : [0.299805,0.599609]
Blue Primary       : [0.150391,0.0595703]
White Point        : [0.3125,0.329102]
Min Luminance      : 0 nits
Max Luminance      : 3805.55 nits
Max Full Luminance : 3805.55 nits
[2025-11-11 23:03:10.546]: Info: Desktop resolution [1280x720]
[2025-11-11 23:03:10.546]: Info: Desktop format [DXGI_FORMAT_B8G8R8A8_UNORM]
[2025-11-11 23:03:10.546]: Info: Display refresh rate [240Hz]
[2025-11-11 23:03:10.546]: Info: Requested frame rate [60fps]
[2025-11-11 23:03:10.546]: Info: Client dynamicRange: 0, Display is HDR: false
[2025-11-11 23:03:10.547]: Info: Creating encoder [hevc_nvenc]
[2025-11-11 23:03:10.547]: Info: Color coding: SDR (Rec. 601)
[2025-11-11 23:03:10.547]: Info: Color depth: 8-bit
[2025-11-11 23:03:10.547]: Info: Color range: MPEG
[2025-11-11 23:03:10.564]: Info: Capture format [DXGI_FORMAT_B8G8R8A8_UNORM]
[2025-11-11 23:03:10.599]: Info: NvEnc: created encoder HEVC P1 async two-pass rfi
[2025-11-11 23:03:10.600]: Info: Minimum FPS target set to ~6fps (1.66667e+08ns)
[2025-11-11 23:03:10.600]: Info: Encoding Frame threshold: 16666666ns
[2025-11-11 23:03:17.366]: Info: CLIENT DISCONNECTED
[2025-11-11 23:03:17.408]: Info: Starting async encoder teardown
[2025-11-11 23:03:17.430]: Info: Async encoder teardown complete
[2025-11-11 23:03:17.674]: Info: Session pausing for app [Desktop].

Can you solve this problem?
Headless mode is used. VM built on Proxmox. The OS is Windows 11 Pro and uses GPU passthrough. The driver is also installed and detected correctly.

(Server Screenshot with noVNC)

[ClassicOldSong]

Windows issue with emulated nic. Change the nic to E1000

[Lqm1]

SOLVED!!!
Thank you. It's amazing to see such a quick and appropriate response.

[jakemauer]

Another proxmox 9.1 user here reporting this fixed my black screen no video errors. Thank you @ClassicOldSong!

[HighKing81]

Just a quick 'mee too!'

The weird thing is: I still have another Windows 11 VM that works fine using the virtio adapter, but that one was created before upgrading to Proxmox 9.1 (I believe I was on Proxmox 8.6 when I made that one).

Anyway, I was really puzzled why I couldn't recreate that VM on a new host, and switching the nic to E1000 solved the issue!