Path: csiph.com!pasdenom.info!weretis.net!feeder8.news.weretis.net!srl.newsdeef.eu!news.corradoroberto.it!bofh.it!news.nic.it!robomod From: Salvatore Bonaccorso Newsgroups: linux.debian.bugs.dist,linux.debian.kernel Subject: Bug#1133383: linux-image-amd64: Webcam fails to stream (uvcvideo URB -19 error) on kernel 6.12 Date: Sun, 12 Apr 2026 21:00:01 +0200 Message-ID: References: X-Original-To: LUCIAN , 1133383@bugs.debian.org X-Mailbox-Line: From debian-bugs-dist-request@lists.debian.org Sun Apr 12 18:57:08 2026 Old-Return-Path: X-Spam-Flag: NO X-Spam-Score: -1.699 Reply-To: Salvatore Bonaccorso , 1133383@bugs.debian.org Resent-To: debian-bugs-dist@lists.debian.org Resent-Cc: debian-kernel@lists.debian.org X-Debian-Pr-Message: followup 1133383 X-Debian-Pr-Package: src:linux X-Debian-Pr-Source: linux MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Debian-User: carnil X-Debian-Message: from BTS X-Mailing-List: archive/latest/1963643 List-ID: List-URL: Approved: robomod@news.nic.it Lines: 58 Organization: linux.* mail to news gateway Sender: robomod@news.nic.it X-Original-Date: Sun, 12 Apr 2026 20:55:05 +0200 X-Original-Message-ID: X-Original-References: <177601617472.25807.9609355370481796412.reportbug@Lucian-Ka-Pc> <177601617472.25807.9609355370481796412.reportbug@Lucian-Ka-Pc> Xref: csiph.com linux.debian.bugs.dist:1289346 linux.debian.kernel:91985 Control: tags -1 + moreinfo On Sun, Apr 12, 2026 at 11:19:34PM +0530, LUCIAN wrote: > 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. As you concluded this is a regression, which is the previous last kernel which worked without problems? Identified that, can you please do a bisect of the respective 6.12.y upstream stable versions from the last known good to 6.12.74? if you need instructions on how to do the bisect, let me know. Regards, Salvatore