webcamera not create device

vitalka · 2015-09-05 06:50:14

I connect webcamera

# dmesg
[190693.687086] usb 1-4: new high-speed USB device number 7 using ehci-pci
[190693.831521] uvcvideo: Found UVC 1.00 device Vimicro USB Camera (Altair) (0ac8:3450)
[190693.833329] input: Vimicro USB Camera (Altair) as /devices/pci0000:00/0000:00:12.2/usb1/1-4/1-4:1.0/input/input18

# lsusb
Bus 001 Device 007: ID 0ac8:3450 Z-Star Microelectronics Corp.

If I chek /dev/video* - empty

Why?

Thnx!

Lone_Wolf · 2015-09-05 13:50:57

Check https://wiki.archlinux.org/index.php/Webcam_setup .

Read the whole page first, then compare your dmesg output with that shown in chapter 3.

Welcome to Archlinux forum .

vitalka · 2015-09-05 14:54:35

# lsmod | grep uvc
uvcvideo 90112 0
videobuf2_vmalloc 16384 2 uvcvideo,stk1160
videobuf2_core 40960 2 uvcvideo,stk1160
videodev 139264 5 saa7115,uvcvideo,stk1160,v4l2_common,videobuf2_core
media 20480 2 uvcvideo,videodev
usbcore 200704 12 snd_usb_audio,uvcvideo,stk1160,ohci_hcd,ohci_pci,snd_usbmidi_lib,ehci_hcd,ehci_pci,usbhid,xhci_hcd,xhci_pci

Module is loaded? Right?

# dmesg|tail
[190693.687086] usb 1-4: new high-speed USB device number 7 using ehci-pci
[190693.831521] uvcvideo: Found UVC 1.00 device Vimicro USB Camera (Altair) (0ac8:3450)
[190693.833329] input: Vimicro USB Camera (Altair) as /devices/pci0000:00/0000:00:12.2/usb1/1-4/1-4:1.0/input/input18

I read the wiki but it did not help me.

Thnx!

Last edited by vitalka (2015-09-05 14:55:15)

Lone_Wolf · 2015-09-05 16:27:00

Looks like your webcam is supported by the stk1160 module, and it is indeed loaded.

The code on that wiki page shows lines you are missing in dmesg :

sn9c102: V4L2 driver for SN9C10x PC Camera Controllers v1:1.24a
<snip>
usb 1-1: V4L2 device registered as /dev/video0

Is the package v4l-utils installed on your system ?

vitalka · 2015-09-05 16:43:52

Yes

v4l-utils-1.6.3-1

I load module: stk1160
# lsmod | grep stk1160
stk1160 28672 0
snd_ac97_codec 122880 1 stk1160
videobuf2_vmalloc 16384 2 uvcvideo,stk1160
videobuf2_core 40960 2 uvcvideo,stk1160
v4l2_common 16384 3 saa7115,stk1160,videobuf2_core
videodev 139264 5 saa7115,uvcvideo,stk1160,v4l2_common,videobuf2_core
snd 69632 17 snd_hda_codec_realtek,snd_usb_audio,snd_ac97_codec,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_rawmidi,stk1160,snd_hda_codec_generic,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_mpu401_uart,snd_seq_device,snd_cmipci,snd_opl3_lib
usbcore 200704 12 snd_usb_audio,uvcvideo,stk1160,ohci_hcd,ohci_pci,snd_usbmidi_lib,ehci_hcd,ehci_pci,usbhid,xhci_hcd,xhci_pci
i2c_core 49152 9 drm,saa7115,i2c_piix4,drm_kms_helper,i2c_algo_bit,stk1160,v4l2_common,radeon,videodev

# dmesg | tail
[226616.221017] usb 1-4: new high-speed USB device number 9 using ehci-pci
[226616.365433] uvcvideo: Found UVC 1.00 device Vimicro USB Camera (Altair) (0ac8:3450)
[226616.367416] input: Vimicro USB Camera (Altair) as /devices/pci0000:00/0000:00:12.2/usb1/1-4/1-4:1.0/input/input20

The same result.

Thnx!

Lone_Wolf · 2015-09-05 16:57:13

Well, we've reached the end of my knowledge about webcams. Others will have to take over.

One thing that may help them is if you post FULL dmesg (big, better use a pastebin site, check wiki) , along with lsusb and lsusb -t output.

vitalka · 2015-09-05 17:27:00

$ uname -a
Linux turbo 4.1.6-1-ARCH #1 SMP PREEMPT Mon Aug 17 08:52:28 CEST 2015 x86_64 GNU/Linux

$ lsusb -t
/: Bus 13.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/4p, 12M
/: Bus 12.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/2p, 12M
/: Bus 11.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 10.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/5p, 12M
/: Bus 09.Port 1: Dev 1, Class=root_hub, Driver=ohci-pci/5p, 12M
|__ Port 3: Dev 2, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M
/: Bus 08.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 07.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/4p, 480M
/: Bus 06.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 05.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/5p, 480M
|__ Port 1: Dev 2, If 0, Class=Vendor Specific Class, Driver=stk1160, 480M
|__ Port 1: Dev 2, If 1, Class=Audio, Driver=snd-usb-audio, 480M
|__ Port 1: Dev 2, If 2, Class=Audio, Driver=snd-usb-audio, 480M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 5000M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/2p, 480M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ehci-pci/5p, 480M
|__ Port 4: Dev 9, If 0, Class=Video, Driver=usbfs, 480M
|__ Port 4: Dev 9, If 1, Class=Video, Driver=usbfs, 480M

$ dmesg
http://pastebin.com/H8Qgd6rc

Lone_Wolf · 2015-09-08 12:56:56

[    4.534467] usb 4-1: New device Syntek Semiconductor USB 2.0 Video Capture Controller @ 480 Mbps (05e1:0408, interface 0, class 0)
[    4.534468] usb 4-1: video interface 0 found

<snip>

[    6.485064] stk1160: driver ver 0.9.5 successfully loaded
[    6.595079] stk1160 4-1:1.0: AC'97 0 access is not valid [0x0], removing mixer.
[    6.595948] stk1160: registers to NTSC like standard
[    6.756385] stk1160 4-1:1.0: V4L2 device registered as video0
[    6.756500] usbcore: registered new interface driver stk1160
[    6.763294] usbcore: registered new interface driver snd-usb-audio

<snip>

[183786.038658] usb 1-4: new high-speed USB device number 3 using ehci-pci
[183786.201372] uvcvideo: Found UVC 1.00 device Vimicro USB Camera (Altair) (0ac8:3450)
[183786.203832] input: Vimicro USB Camera (Altair) as /devices/pci0000:00/0000:00:12.2/usb1/1-4/1-4:1.0/input/input14
[183786.203988] usbcore: registered new interface driver uvcvideo
[183786.203989] USB Video Class driver (1.1.1)
[183883.567351] stk1160: registers to PAL like standard
[183883.720622] stk1160: queue_setup: buffer count 8, each 829440 bytes
[183883.722613] stk1160: setting alternate 5
[183883.722616] stk1160: minimum isoc packet size: 3072 (alt=5)
[183883.722617] stk1160: setting alt 5 with wMaxPacketSize=3072
[183883.723297] stk1160: allocating urbs...
[183883.724153] stk1160: 16 urbs allocated
[183883.724661] stk1160: streaming started
[183892.134540] stk1160: killing 16 urbs...
[183892.295579] stk1160: all urbs killed
[183892.295582] stk1160: freeing 16 urb buffers...
[183892.295608] stk1160: all urb buffers freed
[183892.295609] stk1160: setting alternate 0
[183892.296002] stk1160: streaming stopped
[184276.099781] usb 1-4: USB disconnect, device number 3

This does look like the stk1160 kernel module takes care Syntek Semiconductor USB 2.0 Video Capture Controller , but somehow clashes with the vimicro webcam.

please post lsusb , that should show hardware IDs .

vitalka · 2015-09-08 14:40:12

$ lsusb
Bus 007 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 013 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 008 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 011 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 012 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 002: ID 05e1:0408 Syntek Semiconductor Co., Ltd STK1160 Video Capture Device
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 010 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 009: ID 0ac8:3450 Z-Star Microelectronics Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 009 Device 002: ID 046d:c019 Logitech, Inc. Optical Tilt Wheel Mouse
Bus 009 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Lone_Wolf · 2015-09-09 21:58:41

I did some investigating, and figured out that Z-Star Microelectronics Corp is a chipset maker, and vimicro does indeed use their chips.

some questions for clarification :
boot without the webcamera plugged in
I expect you will see a dev/video* devices at this point, but need verification.
plug in the webcam, does this make the video* device disappear ?

If that's the case, try the following :
blacklist the stk1160 kernel module
reboot, verify it's not loaded through lsmod.
plug in the webcam, post full dmesg.
check for dev/video* devices.

Arch Linux

#1 2015-09-05 06:50:14

webcamera not create device

#2 2015-09-05 13:50:57

Re: webcamera not create device

#3 2015-09-05 14:54:35

Re: webcamera not create device

#4 2015-09-05 16:27:00

Re: webcamera not create device

#5 2015-09-05 16:43:52

Re: webcamera not create device

#6 2015-09-05 16:57:13

Re: webcamera not create device

#7 2015-09-05 17:27:00

Re: webcamera not create device

#8 2015-09-08 12:56:56

Re: webcamera not create device

#9 2015-09-08 14:40:12

Re: webcamera not create device

#10 2015-09-09 21:58:41

Re: webcamera not create device

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