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[SOVED]no /dev/video0; webcam not working
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jody
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Location: Switzerland

PostPosted: Sun Jan 12, 2014 9:09 pm    Post subject: [SOVED]no /dev/video0; webcam not working Reply with quote

Hi
I have a Samsung NP700G7C on which the webcam doesn't work anymore.
I also noticed that there is no /dev/video (or anyother /dev/video*).
I don't know what caused this, but there is no /dev/video0 on my laptop (Samsung NP700G7C).
with lsusb i don't see any obvious webcam:
Code:
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 003 Device 002: ID 046d:c050 Logitech, Inc. RX 250 Optical Mouse
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 1210:2625 DigiTech
Bus 002 Device 003: ID 8087:07da Intel Corp.


Some months ago the webcam was still working (i was able to skype with video), but in he meantime i had several emerges and have only now tried to use the webcam.
But it seems not to work. For instance "Cheese webcan booth" says "No device found"

Is there a way i can make the webcam work again?
Thank You
Jody


Last edited by jody on Mon Feb 17, 2014 9:41 pm; edited 1 time in total
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Jaglover
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Joined: 29 May 2005
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Location: Saint Amant, Acadiana

PostPosted: Sun Jan 12, 2014 9:44 pm    Post subject: Reply with quote

Sounds like hardware failure.
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Hu
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Joined: 06 Mar 2007
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PostPosted: Sun Jan 12, 2014 10:07 pm    Post subject: Reply with quote

What exactly have you changed since last it worked? Are you using the same kernel as when it last worked? Has the machine undergone any physical maintenance that could have disrupted connectors?
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jody
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Joined: 16 Oct 2007
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Location: Switzerland

PostPosted: Mon Jan 13, 2014 7:51 am    Post subject: Reply with quote

I have never opened or dropped my laptop.
The most significant change was emerging systemd. But since i had various problems with it, i removed the "init=/usr/lib/systemd/systemd" from the grub and continued to start with the normal openrc.
I must admit my computer is in a bad software state - when i 'emerge world' i get a zilllion blocks and multiple slot errors mostly related to gnome (i currently use gnome 2, but every emerge i want to do tries to pull in all of gnome 3.8)
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szatox
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PostPosted: Mon Jan 13, 2014 8:00 pm    Post subject: Reply with quote

Have you updated your kernel? It's very likely you just forgot to build modules, as media-related stuff is disabled by default. Updating world should not couse your webcam to disappear since it's not userland that runs it. IF you can, try plugging that webcam to another pc, looking at your lsusb I guess either your webcam or usb port is broken.
Also, you might try to compare output of `dmesg | tail` before and after pluging your webacm.
unmasking gnome 3 has given many users a headache
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jody
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PostPosted: Mon Feb 17, 2014 9:41 pm    Post subject: Reply with quote

I got it working again:
I set the kernel options
Code:
CONFIG_MEDIA_CAMERA_SUPPORT=y
CONFIG_MEDIA_USB_SUPPORT=y
CONFIG_USB_VIDEO_CLASS=m
CONFIG_USB_VIDEO_CLASS_INPUT_EVDEV=y
CONFIG_SND_USB=y
CONFIG_SND_USB_AUDIO=m

rebuilt the kernel and rebooted.

Jody
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