[BUG] intel iGPU hardware video encoding acceleration not triggered with lscr.io/linuxserver/webtop:ubuntu-xfce when using vah264enc

[nickrunning]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

When using the lscr.io/linuxserver/webtop:ubuntu-xfce image and setting SELKIES_ENCODER to vah264enc, the Intel iGPU UHD730 does not trigger hardware video encoding acceleration. However, when I use a custom-built image based on ghcr.io/linuxserver/baseimage-selkies:ubuntunoble and set vah264enc, the hardware video acceleration is triggered as expected. This can be observed by running intel_gpu_top and checking whether the selkies process is utilizing the Video column.

Expected Behavior

SELKIES_ENCODER set to vah264enc should trigger hardware video encoding acceleration on Intel iGPU UHD730 (visible in intel_gpu_top).

Steps To Reproduce

1. Deploy a container using lscr.io/linuxserver/webtop:ubuntu-xfce
2. Set SELKIES_ENCODER to vah264enc environment variable
3. Start the container on a system with Intel iGPU UHD730
4. Use the application to trigger video encoding
5. Run intel_gpu_top and observe the Video column. The selkies process does not utilize video hardware acceleration.
6. Compare with a custom image built from ghcr.io/linuxserver/baseimage-selkies:ubuntunoble with the same encoder setting: hardware acceleration is correctly triggered.

Environment

- OS: Ubuntu (version as per test environment)
- How docker service was installed: (please fill in as appropriate)

CPU architecture

x86-64

Docker creation

docker run -d --rm --name=webtop \
  --device /dev/dri:/dev/dri \
  -e SELKIES_ENCODER=vah264enc \
  lscr.io/linuxserver/webtop:ubuntu-xfce

Container logs

[migrations] started
[migrations] no migrations found
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      ██║     ╚════██║██║██║   ██║
      ███████╗███████║██║╚██████╔╝
      ╚══════╝╚══════╝╚═╝ ╚═════╝

   Brought to you by linuxserver.io
───────────────────────────────────────

To support LSIO projects visit:
https://www.linuxserver.io/donate/

───────────────────────────────────────
GID/UID
───────────────────────────────────────

User UID:    1000
User GID:    100
───────────────────────────────────────
[ls.io-init] Creating initial backup of system rc.xml
**** adding /dev/dri/card0 to video group video with id 44 ****
**** adding /dev/dri/renderD128 to video group _ssh with id 103 ****
[custom-init] No custom files found, skipping...
_XSERVTransmkdir: ERROR: euid != 0,directory /tmp/.X11-unix will not be created.
screen 0 shmid 0
[ls.io-init] done.
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning:          Could not resolve keysym XF86CameraAccessEnable
> Warning:          Could not resolve keysym XF86CameraAccessDisable
> Warning:          Could not resolve keysym XF86CameraAccessToggle
> Warning:          Could not resolve keysym XF86NextElement
> Warning:          Could not resolve keysym XF86PreviousElement
> Warning:          Could not resolve keysym XF86AutopilotEngageToggle
> Warning:          Could not resolve keysym XF86MarkWaypoint
> Warning:          Could not resolve keysym XF86Sos
> Warning:          Could not resolve keysym XF86NavChart
> Warning:          Could not resolve keysym XF86FishingChart
> Warning:          Could not resolve keysym XF86SingleRangeRadar
> Warning:          Could not resolve keysym XF86DualRangeRadar
> Warning:          Could not resolve keysym XF86RadarOverlay
> Warning:          Could not resolve keysym XF86TraditionalSonar
> Warning:          Could not resolve keysym XF86ClearvuSonar
> Warning:          Could not resolve keysym XF86SidevuSonar
> Warning:          Could not resolve keysym XF86NavInfo
Errors from xkbcomp are not fatal to the X server
19
20
WARNING:root:Invalid value(s) 'vah264enc' for encoder. Using system default.
INFO:data_websocket:pcmflux library found. Audio capture is available.
INFO:data_websocket:pixelflux library found. Striped encoding modes available.
INFO:root:Expected C js_config_t size (from ctypes): 1354 bytes
INFO:main:Upload directory ensured: /config/Desktop
INFO:main:Starting Selkies (WebSocket Mode) with settings: {'audio_enabled': (True, False), 'microphone_enabled': (True, False), 'gamepad_enabled': (True, False), 'clipboard_enabled': (True, False), 'command_enabled': (True, False), 'file_transfers': ['upload', 'download'], 'encoder': 'x264enc', 'framerate': (8, 120), 'h264_crf': (5, 50), 'jpeg_quality': (1, 100), 'h264_fullcolor': (False, False), 'h264_streaming_mode': (False, False), 'use_cpu': (False, False), 'use_paint_over_quality': (True, False), 'paint_over_jpeg_quality': (1, 100), 'h264_paintover_crf': (5, 50), 'h264_paintover_burst_frames': (1, 30), 'second_screen': (True, False), 'audio_bitrate': '320000', 'is_manual_resolution_mode': (False, False), 'manual_width': 0, 'manual_height': 0, 'scaling_dpi': '96', 'enable_binary_clipboard': (False, False), 'use_browser_cursors': (False, False), 'use_css_scaling': (False, False), 'ui_title': 'Selkies', 'ui_show_logo': (True, False), 'ui_show_core_buttons': (True, False), 'ui_show_sidebar': (True, False), 'ui_sidebar_show_video_settings': (True, False), 'ui_sidebar_show_screen_settings': (True, False), 'ui_sidebar_show_audio_settings': (True, False), 'ui_sidebar_show_stats': (True, False), 'ui_sidebar_show_clipboard': (True, False), 'ui_sidebar_show_files': (True, False), 'ui_sidebar_show_apps': (True, False), 'ui_sidebar_show_sharing': (True, False), 'ui_sidebar_show_gamepads': (True, False), 'ui_sidebar_show_fullscreen': (True, False), 'ui_sidebar_show_gaming_mode': (True, False), 'ui_sidebar_show_trackpad': (True, False), 'ui_sidebar_show_keyboard_button': (True, False), 'ui_sidebar_show_soft_buttons': (True, False), 'port': 8082, 'dri_node': '', 'audio_device_name': 'output.monitor', 'watermark_path': '', 'watermark_location': -1, 'debug': (False, False), 'enable_sharing': (True, False), 'enable_collab': (True, False), 'enable_shared': (True, False), 'enable_player2': (True, False), 'enable_player3': (True, False), 'enable_player4': (True, False)}
INFO:main:Initial Encoder: x264enc, Framerate: 60
INFO:main:SelkiesStreamingApp initialized: encoder=x264enc, display=1024x768
INFO:main:All main components initialized. Running server...
INFO:webrtc_input:System DPI detected as ~96. Cursor size cap set to 32x32px.
INFO:webrtc_input:Resetting keyboard modifiers.
INFO:webrtc_input:Clipboard monitor running (binary mode: False)
INFO:webrtc_input:Found XFIXES version 4.0
INFO:webrtc_input:starting cursor monitor
INFO:webrtc_input:watching for cursor changes
WARNING:data_websocket:Cannot broadcast cursor data: no clients connected or server not ready.
INFO:data_websocket:Data WebSocket Server listening on port 8082
dbus-daemon[323]: [system] Activating service name='org.freedesktop.login1' requested by ':1.16' (uid=1000 pid=443 comm="xfce4-panel" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.login1' failed: Failed to execute program org.freedesktop.login1: Permission denied
INFO:webrtc_input:Initializing 4 persistent gamepad instances...
INFO:root:Packed js_config payload for 'Microsoft X-Box 360 pad' (js0): len=1360 bytes. Name='Microsoft X-Box 360 pad', Vendor=0x045e, Product=0x028e, Version=0x0100, Reported Buttons=11 (Array capacity: 512), Reported Axes=8 (Array capacity: 64)
INFO:selkies_gamepad:Gamepad configured. JS socket: /tmp/selkies_js0.sock, EVDEV socket: /tmp/selkies_event1000.sock. Using fixed config: Microsoft X-Box 360 pad
INFO:webrtc_input:Initialized and started persistent gamepad instance for index 0 (Name: 'Microsoft X-Box 360 pad', JS: /tmp/selkies_js0.sock, EVDEV: /tmp/selkies_event1000.sock).
INFO:root:Packed js_config payload for 'Microsoft X-Box 360 pad' (js1): len=1360 bytes. Name='Microsoft X-Box 360 pad', Vendor=0x045e, Product=0x028e, Version=0x0100, Reported Buttons=11 (Array capacity: 512), Reported Axes=8 (Array capacity: 64)
INFO:selkies_gamepad:Gamepad configured. JS socket: /tmp/selkies_js1.sock, EVDEV socket: /tmp/selkies_event1001.sock. Using fixed config: Microsoft X-Box 360 pad
INFO:webrtc_input:Initialized and started persistent gamepad instance for index 1 (Name: 'Microsoft X-Box 360 pad', JS: /tmp/selkies_js1.sock, EVDEV: /tmp/selkies_event1001.sock).
INFO:root:Packed js_config payload for 'Microsoft X-Box 360 pad' (js2): len=1360 bytes. Name='Microsoft X-Box 360 pad', Vendor=0x045e, Product=0x028e, Version=0x0100, Reported Buttons=11 (Array capacity: 512), Reported Axes=8 (Array capacity: 64)
INFO:selkies_gamepad:Gamepad configured. JS socket: /tmp/selkies_js2.sock, EVDEV socket: /tmp/selkies_event1002.sock. Using fixed config: Microsoft X-Box 360 pad
INFO:webrtc_input:Initialized and started persistent gamepad instance for index 2 (Name: 'Microsoft X-Box 360 pad', JS: /tmp/selkies_js2.sock, EVDEV: /tmp/selkies_event1002.sock).
INFO:root:Packed js_config payload for 'Microsoft X-Box 360 pad' (js3): len=1360 bytes. Name='Microsoft X-Box 360 pad', Vendor=0x045e, Product=0x028e, Version=0x0100, Reported Buttons=11 (Array capacity: 512), Reported Axes=8 (Array capacity: 64)
INFO:selkies_gamepad:Gamepad configured. JS socket: /tmp/selkies_js3.sock, EVDEV socket: /tmp/selkies_event1003.sock. Using fixed config: Microsoft X-Box 360 pad
INFO:webrtc_input:Initialized and started persistent gamepad instance for index 3 (Name: 'Microsoft X-Box 360 pad', JS: /tmp/selkies_js3.sock, EVDEV: /tmp/selkies_event1003.sock).
INFO:selkies_gamepad:Gamepad /tmp/selkies_js0.sock: Event processor started.
INFO:selkies_gamepad:JS interposer server listening on /tmp/selkies_js0.sock
INFO:selkies_gamepad:Gamepad /tmp/selkies_js1.sock: Event processor started.
INFO:selkies_gamepad:JS interposer server listening on /tmp/selkies_js1.sock
INFO:selkies_gamepad:Gamepad /tmp/selkies_js2.sock: Event processor started.
INFO:selkies_gamepad:JS interposer server listening on /tmp/selkies_js2.sock
INFO:selkies_gamepad:Gamepad /tmp/selkies_js3.sock: Event processor started.
INFO:selkies_gamepad:JS interposer server listening on /tmp/selkies_js3.sock
INFO:selkies_gamepad:EVDEV interposer server listening on /tmp/selkies_event1000.sock
INFO:selkies_gamepad:EVDEV interposer server listening on /tmp/selkies_event1001.sock
INFO:selkies_gamepad:EVDEV interposer server listening on /tmp/selkies_event1002.sock
INFO:selkies_gamepad:EVDEV interposer server listening on /tmp/selkies_event1003.sock
dbus-daemon[323]: [system] Activating service name='org.freedesktop.login1' requested by ':1.17' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.login1' failed: Failed to execute program org.freedesktop.login1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.PolicyKit1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.PolicyKit1' failed: Failed to execute program org.freedesktop.PolicyKit1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.login1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.login1' failed: Failed to execute program org.freedesktop.login1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.PolicyKit1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.PolicyKit1' failed: Failed to execute program org.freedesktop.PolicyKit1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.login1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.login1' failed: Failed to execute program org.freedesktop.login1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.PolicyKit1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.PolicyKit1' failed: Failed to execute program org.freedesktop.PolicyKit1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.login1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.login1' failed: Failed to execute program org.freedesktop.login1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.PolicyKit1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.PolicyKit1' failed: Failed to execute program org.freedesktop.PolicyKit1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.login1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.login1' failed: Failed to execute program org.freedesktop.login1: Permission denied
dbus-daemon[323]: [system] Activating service name='org.freedesktop.PolicyKit1' requested by ':1.18' (uid=1000 pid=407 comm="/usr/bin/xfce4-session" label="unconfined") (using servicehelper)
dbus-daemon[323]: [system] Activated service 'org.freedesktop.PolicyKit1' failed: Failed to execute program org.freedesktop.PolicyKit1: Permission denied
INFO:data_websocket:Data WebSocket connected from ('127.0.0.1', 57714)
INFO:data_websocket:Sending last known cursor to new client ('127.0.0.1', 57714)
INFO:data_websocket:Attempting to establish PulseAudio connection...
INFO:data_websocket:PulseAudio connection established.
INFO:data_websocket:Registering new client for display: primary
INFO:data_websocket:Applying and sanitizing client settings for 'primary' (initial=True)
INFO:webrtc_input:Binary clipboard setting changing to: True. Restarting monitor.
INFO:webrtc_input:Stopping clipboard monitor
INFO:webrtc_input:Clipboard monitor task cancelled.
INFO:webrtc_input:Clipboard monitor stopped
INFO:data_websocket:DPI changed from None to 96. Applying system-level change.
INFO:gst_app_resize:XFCE detected. Applying xfconf-query for DPI 96.
INFO:webrtc_input:Clipboard monitor running (binary mode: True)
INFO:gst_app_resize:Found active XFCE session environment. Commands will be executed within this context.
INFO:gst_app_resize:Successfully set XFCE DPI to 96 using xfconf-query.
INFO:gst_app_resize:Attempting to set cursor size to: 32 (based on DPI 96)
INFO:gst_app_resize:Successfully set cursor size to 32
INFO:data_websocket:Initial setup or dimensional change detected for 'primary'. Performing full display reconfiguration.
INFO:data_websocket:Starting display reconfiguration...
INFO:data_websocket:Calculating new extended desktop layout from ALL clients...
INFO:data_websocket:Layout calculated: Total Size=1920x1106. Layouts: {'primary': {'x': 0, 'y': 0, 'w': 1920, 'h': 1106}}
INFO:data_websocket:Mode 1920x1106 not found. Creating it.
INFO:data_websocket:Defining logical monitors for the window manager...
INFO:data_websocket:Starting separate capture instances for each ACTIVE display region...
INFO:data_websocket:Client 'primary' is active. Starting its capture.
INFO:data_websocket:Preparing to start capture for display='primary': Res=1920x1106, Offset=0x0
INFO:data_websocket:Video chunk sender started for display 'primary'.
INFO:data_websocket:SUCCESS: Capture started for 'primary'.
INFO:data_websocket:New frame backpressure task started for display 'primary'.
INFO:data_websocket:Broadcasting primary stream resolution to all clients: {"type": "stream_resolution", "width": 1920, "height": 1106}
INFO:data_websocket:Broadcasting display config update: DISPLAY_CONFIG_UPDATE,{"type": "display_config_update", "displays": ["primary"]}
INFO:data_websocket:Display reconfiguration finished successfully.
INFO:data_websocket:Reconfiguration process complete (state unlocked).
INFO:data_websocket:Initial client settings message processed by ws_handler.
INFO:data_websocket:Initial setup: Primary client connected, audio not active, attempting start.
INFO:data_websocket:Starting pcmflux audio pipeline...
INFO:data_websocket:pcmflux settings: device='output.monitor', bitrate=320000, channels=2
INFO:data_websocket:Frame-based backpressure logic task started for display 'primary'.
INFO:data_websocket:Client settings received, proceeding with backpressure loop for 'primary'.
[pcmflux] Attempting to connect to PulseAudio device: output.monitor...
INFO:data_websocket:pcmflux audio capture started successfully.
INFO:data_websocket:pcmflux audio chunk broadcasting task started.
X Shared Memory Extension available.
XShm setup complete for 1920x1106.
CPU cores available: 8
Stream settings active -> Res: 1920x1106 | FPS: 60.0 | Stripes: 1 | Mode: H264 (CPU) FullFrame | CRF: 25 | PaintOver CRF: 18 (Burst: 5f) | Colorspace: I420 (Limited Range) | Damage Thresh: 10f | Damage Dur: 20f
[pcmflux] SUCCESS: Connected to PulseAudio.
[pcmflux] SUCCESS: Opus encoder created.
[pcmflux] Capture loop started. Device: output.monitor, Rate: 48000, Channels: 2, Bitrate: 320 kbps, VBR: On, Silence Gate: Off, Debug Logging: Off, PCM Chunk: 3840 bytes
INFO:data_websocket:Received START_AUDIO command from client for server-to-client audio.
INFO:data_websocket:START_AUDIO: pcmflux audio pipeline already active.
INFO:data_websocket:Received redundant resize request for primary (1920x1106). No action taken.
[pcmflux] First non-silent audio chunk detected! Encoding...
WARNING:data_websocket:Backpressure TRIGGERED for 'primary'. S:1470, C:1239 (EffDesync:224.8f > Allowed:120.0f).
INFO:data_websocket:Received STOP_VIDEO for 'primary'. Stopping stream.
INFO:data_websocket:Stopping all streams for display 'primary'...
INFO:data_websocket:Backpressure logic task for 'primary' cancelled.
INFO:data_websocket:Backpressure logic task for 'primary' finished.
INFO:data_websocket:Backpressure task for 'primary' was stopped. Resetting its frame IDs.
INFO:data_websocket:Resetting frame IDs for display 'primary'.
INFO:data_websocket:Broadcasting primary pipeline reset to all 1 clients: PIPELINE_RESETTING primary
INFO:data_websocket:Successfully stopped all streams for display 'primary'.
INFO:data_websocket:Video chunk sender for 'primary' cancelled.
INFO:data_websocket:Video chunk sender for 'primary' finished.
Capture loop stopped. X resources released.

[github-actions]

Thanks for opening your first issue here! Be sure to follow the relevant issue templates, or risk having this issue marked as invalid.

[nickrunning]

update: use default settings SELKIES_ENCODER='x264enc,x264enc-striped,jpeg', ghcr.io/linuxserver/baseimage-selkies:ubuntunoble is works with H264(VAAPI),but ubuntu-xfce use the H264(CPU).

[thelamer]

All you need to do is this

--device /dev/dri:/dev/dri

The server does the rest, you can disable gpu accel with the cpu overide in the sidebar.

[thelamer]

Though just a side note you might need to disable accel in the container (userspace apps) the dri3 implementation seems to have trouble with Intel iGPUs -e DISABLE_DRI3=true

[nickrunning]

All you need to do is this你只需要做这个

--device /dev/dri:/dev/dri

The server does the rest, you can disable gpu accel with the cpu overide in the sidebar.服务器会处理其余部分，你可以在侧边栏中通过 cpu overide 禁用 gpu 加速。

I used a webtop:ubuntu-xfce image I built myself (using the docker build command), and everything works fine. This is very strange, is there an error in the automated build process?