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Bug#1133383: linux-image-amd64: Webcam fails to stream (uvcvideo URB -19 error) on kernel 6.12

Cross-posted to 2 groups.

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Package: linux-image-amd64
Version: 6.12.74-2
Severity: important
X-Debbugs-Cc: ky80jqllj@mozmail.com

Dear Maintainer,

System: Debian Trixie (KDE Plasma)
Kernel: 6.12.74+deb13+1-amd64
Device: Internal HP Wide Vision HD Camera (USB ID: 30c9:0069)

Issue:
The internal webcam is detected but fails to stream video.

Details:
- /dev/video0 and /dev/video1 are present
- v4l2-ctl shows MJPG and YUYV formats correctly
- Applications such as Cheese, ffplay, and Signal show a black screen
- Camera starts but immediately disconnects

Kernel logs show repeated errors:
uvcvideo: Failed to resubmit video URB (-19)

This is followed by repeated USB device reinitialization.

libcamera:
- cam -l detects the camera correctly
- cam -c1 opens the camera but no preview/output is shown

Troubleshooting performed:
- Disabled USB autosuspend
- Reloaded uvcvideo with quirks
- Forced MJPEG and YUYV formats
- Reduced resolution and FPS
- Tested multiple applications
- Issue persists in all cases

Result:
Camera stream fails immediately after initialization and repeatedly disconnects.

Conclusion:
This appears to be a regression in the uvcvideo driver or kernel 6.12 affecting this webcam.

Expected behavior:
The camera should stream video normally via V4L2 and libcamera.

Thank you.


-- System Information:
Debian Release: 13.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 6.12.74+deb13+1-amd64 (SMP w/12 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_IN, LC_CTYPE=en_IN (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-amd64 depends on:
ii  linux-image-6.12.74+deb13+1-amd64  6.12.74-2

linux-image-amd64 recommends no packages.

linux-image-amd64 suggests no packages.

-- no debconf information

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Bug#1133383: linux-image-amd64: Webcam fails to stream (uvcvideo URB -19 error) on kernel 6.12 LUCIAN <ky80jqllj@mozmail.com> - 2026-04-12 20:00 +0200
  Bug#1133383: linux-image-amd64: Webcam fails to stream (uvcvideo URB -19 error) on kernel 6.12 Salvatore Bonaccorso <carnil@debian.org> - 2026-04-12 21:00 +0200

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