Arch Linux

johnp636

Member

From: St. Louis, MO, USA

Registered: 2013-12-30

Posts: 21

[Solved] Logitech Webcam C910 not recognized, uvcvideo module fails

I've got a new Arch installation, and I'm having trouble getting my Logitech Webcam C910 (046d:0821) to be recognized.  It shows up in lsusb's output, and the microphone built in to the webcam works fine (it shows up in gnome's sound properties, and the levels respond when I tap on the mic).  dmesg doesn't say much when I plug it in:

[ 1140.968312] usb 4-1.7: new high-speed USB device number 3 using ehci-pci

This is a UVC webcam, so I tried a modprobe uvcvideo, but it fails:

$ sudo modprobe uvcvideo
modprobe: ERROR: ctx=0xfb1010 path=/lib/modules/3.12.6-1-ARCH/kernel/drivers/media/v4l2-core/videobuf2-vmalloc.ko.gz error=No such file or directory
modprobe: ERROR: ctx=0xfb1010 path=/lib/modules/3.12.6-1-ARCH/kernel/drivers/media/v4l2-core/videobuf2-vmalloc.ko.gz error=No such file or directory
modprobe: ERROR: could not insert 'uvcvideo': Unknown symbol in module, or unknown parameter (see dmesg)

dmesg doesn't show anything after this, however.  I know the C910 worked fine in my old Linux distribution, so the newer kernel that came with Arch should support it, too.  Any ideas?

Edit: /lib/modules/3.12.6-1-ARCH/kernel/drivers/media is empty---so the V4L2 modules are not installed on this machine.  Are they in a separate Arch package---I would have thought they'd be part of the linux kernel package.

Edit2: Somehow, my kernel package didn't populate the /lib/modules tree completely.  Reinstalling the linux package fixed it.

Last edited by johnp636 (2013-12-30 21:26:21)