Internal webcam (Azurewave 13d3:56bd) resets on stream start — Razer Blade 15 Base (Early 2020)

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Razer Blade 15 Base (RZ09-0328) internal webcam (13d3:56bd) — UVC device resets at stream start, anyone got it working?

Posting partly as a heads-up and partly to ask if anyone with this hardware found a workaround.

Setup

  • Razer Blade 15 Base Model (Early 2020), RZ09-0328

  • NixOS 26.05, kernel 6.18.36

  • Internal webcam: Azurewave / IMC Networks, 13d3:56bd, UVC 1.00

Symptom

The camera enumerates fine and exposes valid MJPEG + YUYV formats (v4l2-ctl --list-formats-ext looks correct), but any attempt to start a stream fails:

ffmpeg -f v4l2 -input_format mjpeg -video_size 640x480 -i /dev/video0 -frames:v 1 /tmp/test.jpg
# ioctl(VIDIOC_STREAMON): Protocol error

dmesg shows the device disconnecting and re-enumerating at the exact moment of VIDIOC_STREAMON . It physically drops off the USB bus when streaming is commanded.

What I’ve ruled out

  • Not autosuspend : failure persists with power/control=on.

  • Not bandwidth : 160x120 (smallest mode) fails identically to 1280x720.

  • Not a packaging/config issue : quirks applied correctly via boot.extraModprobeConfig (dmesg confirms “Forcing device quirks to 0xNN”).

The descriptor shows the streaming interface is isochronous-only (no bulk endpoint), so UVC_QUIRK_FORCE_BULK is structurally inapplicable. Tested quirks=0x80 and 0x83, neither helped. The reset happens in the isochronous SET_INTERFACE path.

Conclusion so far

This looks like a kernel-level uvcvideo issue with no working quirk in current mainline. I’ve reported it to linux-media. The hardware is electrically healthy; it just can’t stream under the current driver.

NixOS-specific config (for reference)

If anyone wants to try a quirk value, this is the declarative way (no imperative /etc/modprobe.d, which is read-only on NixOS):

boot.extraModprobeConfig = ''
  options uvcvideo quirks=0x83
'';

Then sudo nixos-rebuild switch and reboot. Confirm it loaded with:

sudo dmesg | grep -i "quirks to"

Questions

  1. Anyone else on a Razer Blade 15 Base (RZ09-0328) , or another laptop with 13d3:56bd?Does your internal webcam stream under Linux? If so, what kernel + quirk?

  2. Has anyone added a working quirk for this VID:PID to nixos-hardware or their config?

For now I’m falling back to an external USB webcam, which works without issue. Will update here if linux-media identifies a quirk.