[SOLVED] /dev/video0 no longer shows up in my system.

I have been running arch on my laptop for about a year or two with no problems. The laptop I have has an inbuilt webcam that I used to be able to use fine.
I haven't tried to use it in about a month or so but I just did and it appears completely blank. I try to check things are alright and can no longer find /dev/video0 which is where it used to show up.
looking at the wiki page it says to identify your webcam with lsusb but I assume that is only for usb webcams rather than inbuilt ones. I also tried looking at my dmesg but can't find anything looking like a webcam. How can I debug this and where should I look for information on how to set this up?
EDIT:: Here is the output of lspci
➜ ~ sudo lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5)
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5)
00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM87 Express LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
01:00.0 3D controller: NVIDIA Corporation GK106M [GeForce GTX 765M] (rev a1)
03:00.0 Network controller: Intel Corporation Wireless 7260 (rev 73)
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5289 (rev 01)
04:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0a)
and lsusb
➜ ~ sudo lsusb
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 Intel Corp.
Bus 001 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 003 Device 002: ID 8087:07dc Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
none of these look like a webcam to me, does anyone have any thoughts/advice?
Last edited by crashandburn4 (2014-05-26 17:43:43)

Head_on_a_Stick wrote:
I don't know -- you should start a new thread and describe the steps taken so far.
Nobody will check this thread because it is marked as solved.
I just were about to do so, but tu ensure that there isn't already a new thread about that i searched for it and found a also solved thread, but as i saw the user trying to accses his webcam by typing fswebcam, i tried it too and came to the point that i didn't have installed that. To see if i would get the same errormessege as he did i installed ist via pacman and tried again to run it:
$ fswebcam
--- Opening /dev/video0...
stat: No such file or directory
then pressed the webcamkey...
$ fswebcam
--- Opening /dev/video0...
stat: No such file or directory
...pressed it again...
$ fswebcam
--- Opening /dev/video0...
Trying source module v4l2...
/dev/video0 opened.
No input was specified, using the first.
Adjusting resolution from 384x288 to 352x288.
--- Capturing frame...
Captured frame in 0.00 seconds.
--- Processing captured image...
There are unsaved changes to the image.
so at last there wasn't any error at all.
after that i tried typing
$ ls /dev/ |grep video
video0
so my webcam was there again, and worked in cheese too. The only other actions i did befor taht were again a pacman -Syyu which only updated my flashplugins and git and also a system reboot (nautilus stopped working and after restarting nautilus it wasn't recognising inserting my microSD, or a USB-flashdrive, so i tried to reboot). After all of this i don't know why it helped
pacman -Syyu couldn't couse that as far as it din't update anything the webcam is depending on
a systemreboot just reloads all kernelmodules and restarts the applications - the new modules after kernel update had to be loaded before as i did serveral reboots since then
installing fswebcam can't change anything that couses /dev/video0 to appear
But thank you anyway!

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Edited subject
Last edited by von_Wanderlust (2009-07-28 16:10:22)

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See my final post for "solution"
Original question:
I'm a fairly new newbie to kernel issues.
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TheGipp
Last edited by TheGipp (2013-09-02 23:31:47)

Lone_Wolf,
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04:05.0 Communication controller: MosChip Semiconductor Technology Ltd. PCI 9835 Multi-I/O Controller (rev 01)
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Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 17
Region 0: I/O ports at ccc8 [size=8]
Region 1: I/O ports at ccd0 [size=8]
Region 2: I/O ports at ccd8 [size=8]
Region 3: I/O ports at cce0 [size=8]
Region 4: I/O ports at cce8 [size=8]
Region 5: I/O ports at ccf0 [size=16]
Kernel driver in use: serial
Kernel modules: parport_serial
I'm not sure what all of that means. But there is no reference to the parallel port. Too bad, I don't have that type of printout from when it worked six months ago.
The card is a Rosewill RC303 - 2 serial ports and 1 parallel port. Is "Region 5" above the parallel port?
Like I said earlier WindowsXP thinks it's ok. So, either Windows didn't check well or Arch/udev is missing some aspect of the PCI card that it used to find on bootup.
any ideas on how to dig more?
Last edited by TheGipp (2013-09-02 15:47:52)

Cannot identify '/dev/video0': 2, No such file or directory

hi! i have a cheap webcam that used to work perfectly on arch, but some update broke it because /dev/video no longer exists (i don't know which upgrade, it has been some months since i used it last time)
when i try to run my webcam applications, it goes like that:
[nbcjr@universo ~]$ sonic-snap
Cannot identify '/dev/video0': 2, No such file or directory
[nbcjr@universo ~]$ sudo ls /dev/
adsp dvd hdb kmsg loop7 psaux ram2 snd ttyS2
audio fb hdb1 legacy mapper ptmx ram3 sound ttyS3
cd fb0 hdb2 log md pts ram4 stderr urandom
cdrom fd hdb3 loop md0 ram0 ram5 stdin vc
cdroms fd0 hdb4 loop0 mem ram1 ram6 stdout vcc
cdrw fd0h1200 hdb5 loop1 misc ram10 ram7 tts zero
console fd0u1440 hdc loop2 mixer ram11 ram8 tty
core fd0u360 ide loop3 null ram12 ram9 tty1
discs fd0u720 initctl loop4 nvidia0 ram13 random tty7
disk floppy input loop5 nvidiactl ram14 rd ttyS0
dsp full kmem loop6 port ram15 shm ttyS1
thanks!

That would have been the last kernal upgrade, wiped out my USB mouse which caused XWindows to crash, They had to change back to the UDEV system. I believe the maintainer for the devFS system quit but anyways it was taken out of the kernal.
What I had to do was to change the configuration from /dev/mouse to /dev/input/mouse0, i beileve you can also do ln -s /dev/input/mouse0 /dev/mouse. Try looking in /dev/input/ for your camera.

[SOLVED] /dev/video0 no longer shows up in my system.

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