I tested on the latest mainline kernel and still have the same issue:
jlquinn@cerberus:~$ v4l2-ctl --device /dev/video0 --stream-mmap
--stream-to=frame.raw --stream-count=1
VIDIOC_STREAMON returned -1 (Protocol error)
jlquinn@cerberus:~$ uname -a
Linux cerberus 6.15.0-061500rc7-generic #202505182143 SMP PREEMPT_DYNAMIC Sun
May 18 22:13:39 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
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https://bugs.launchpad.net/bugs/2110582
Title:
Protocol error when capturing from UVC webcam
Status in linux-hwe-6.11 package in Ubuntu:
New
Bug description:
jlquinn@cerberus:~/sw/src/libcamera$ lsb_release -rd
No LSB modules are available.
Description: Ubuntu 24.04.2 LTS
Release: 24.04
jlquinn@cerberus:~/sw/src/libcamera$ apt-cache policy
linux-image-6.11.0-25-generic
linux-image-6.11.0-25-generic:
Installed: 6.11.0-25.25~24.04.1
Candidate: 6.11.0-25.25~24.04.1
Version table:
*** 6.11.0-25.25~24.04.1 500
500 http://us.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu noble-security/main amd64
Packages
100 /var/lib/dpkg/status
Hi. I started trying to track this down in libcamera, but was directed here.
The bug report there is https://bugs.libcamera.org/show_bug.cgi?id=270 and
they suggested I report to linux-media and linux-usb lists. I'm reporting here
first, since I'm running a stock Ubuntu kernel.
My webcam does not work for video capture, though audio does work.
jlquinn@cerberus:~/Videos/junk1$ v4l2-ctl --device /dev/video0 --stream-mmap
--stream-to=frame.raw --stream-count=1
VIDIOC_STREAMON returned -1 (Protocol error)
According to the reply from the libcamera folks, this should save a
frame to file.
When I plug the camera in, I get the following in my log:
May 13 14:56:25 cerberus kernel: usb 3-11.3: new high-speed USB device number
61 using xhci_hcd
May 13 14:56:25 cerberus kernel: usb 3-11.3: New USB device found,
idVendor=26e0, idProduct=6230, bcdDevice= 1.00
May 13 14:56:26 cerberus kernel: usb 3-11.3: New USB device strings: Mfr=2,
Product=1, SerialNumber=3
May 13 14:56:26 cerberus kernel: usb 3-11.3: Product: L01 HD Webcam
May 13 14:56:26 cerberus kernel: usb 3-11.3: Manufacturer: Sonix Technology
Co., Ltd.
May 13 14:56:26 cerberus kernel: usb 3-11.3: SerialNumber: SN0001
May 13 14:56:26 cerberus kernel: usb 3-11.3: Found UVC 1.00 device L01 HD
Webcam (26e0:6230)
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_INFO) UVC
control 5 on unit 1: 0 (exp. 1).
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_INFO) UVC
control 7 on unit 1: 0 (exp. 1).
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_INFO) UVC
control 9 on unit 1: 0 (exp. 1).
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_INFO) UVC
control 10 on unit 1: 0 (exp. 1).
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_INFO) UVC
control 12 on unit 1: 0 (exp. 1).
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_INFO) UVC
control 14 on unit 1: 0 (exp. 1).
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_INFO) UVC
control 16 on unit 1: 0 (exp. 1).
May 13 14:56:26 cerberus kernel: usb 3-11.3: 3:1: cannot get freq at ep 0x84
May 13 14:56:26 cerberus mtp-probe[372881]: checking bus 3, device 61:
"/sys/devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.3"
May 13 14:56:26 cerberus mtp-probe[372881]: bus: 3, device: 61 was not an MTP
device
May 13 14:56:26 cerberus pipewire[15704]: spa.v4l2: '/dev/video0'
VIDIOC_QUERYCTRL: Broken pipe
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_DEF) UVC
control 12 on unit 1: 0 (exp. 3).
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_DEF) UVC
control 12 on unit 1: 0 (exp. 3).
May 13 14:56:26 cerberus pipewire[15704]: spa.v4l2: '/dev/video0'
VIDIOC_QUERYCTRL: Broken pipe
May 13 14:56:26 cerberus mtp-probe[372924]: checking bus 3, device 61:
"/sys/devices/pci0000:00/0000:00:14.0/usb3/3-11/3-11.3"
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_DEF) UVC
control 12 on unit 1: 0 (exp. 3).
May 13 14:56:26 cerberus mtp-probe[372924]: bus: 3, device: 61 was not an MTP
device
May 13 14:56:26 cerberus wireplumber[30571]:
<WpPortalPermissionStorePlugin:0x6347b33119e0> Failed to call Lookup:
GDBus.Error:org.freedesktop.portal.Error.NotFound: No entry for camera
May 13 14:56:26 cerberus pipewire[15704]: [38:31:25.985697810] [15704] INFO
Camera camera_manager.cpp:284 libcamera v0.2.0
May 13 14:56:26 cerberus kernel: usb 3-11.3: Failed to query (GET_DEF) UVC
control 12 on unit 1: 0 (exp. 3).
May 13 14:56:26 cerberus kernel: usb 3-11.3: 3:1: cannot get freq at ep 0x84
May 13 14:56:26 cerberus kernel: usb 3-11.3: 3:1: cannot get freq at ep 0x84
May 13 14:56:26 cerberus wireplumber[30571]:
<WpPortalPermissionStorePlugin:0x6347b33119e0> Failed to call Lookup:
GDBus.Error:org.freedesktop.portal.Error.NotFound: No entry for camera
When I run the v4l2-ctl command, the following gets added to my log:
May 13 14:57:06 cerberus kernel: usb 3-11.3: Failed to query (GET_DEF) UVC
control 12 on unit 1: 2 (exp. 3).
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-image-6.11.0-25-generic 6.11.0-25.25~24.04.1
ProcVersionSignature: Ubuntu 6.11.0-25.25~24.04.1-generic 6.11.11
Uname: Linux 6.11.0-25-generic x86_64
ApportVersion: 2.28.1-0ubuntu3.5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue May 13 14:49:54 2025
InstallationDate: Installed on 2020-05-29 (1810 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64
(20190805)
MachineType: Supermicro X10DAi
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.11.0-25-generic
root=/dev/mapper/ubuntu--vg-root ro
RelatedPackageVersions:
linux-restricted-modules-6.11.0-25-generic N/A
linux-backports-modules-6.11.0-25-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.11
RfKill:
SourcePackage: linux-hwe-6.11
UpgradeStatus: Upgraded to noble on 2025-05-01 (13 days ago)
dmi.bios.date: 12/16/2019
dmi.bios.release: 5.11
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3.2
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X10DAI
dmi.board.vendor: Supermicro
dmi.board.version: 1.01
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To be filled by O.E.M.
dmi.chassis.version: To be filled by O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr3.2:bd12/16/2019:br5.11:svnSupermicro:pnX10DAi:pvr123456789:rvnSupermicro:rnX10DAI:rvr1.01:cvnTobefilledbyO.E.M.:ct3:cvrTobefilledbyO.E.M.:sku083615D9:
dmi.product.family: SMC X10
dmi.product.name: X10DAi
dmi.product.sku: 083615D9
dmi.product.version: 123456789
dmi.sys.vendor: Supermicro
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