I'm trying to debug what went wrong with my installation of Antergos linux (Arch based). This Webcam used to work, but now it doesn't anymore. Unfortunately, I can't deduce when it stopped working since I haven't used it for a month.
This is output dmesg on hotplug:[ 395.012656] usb 1-12: new high-speed USB device number 7 using xhci_hcd
[ 395.403371] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825)
[ 395.493403] uvcvideo 1-12:1.0: Entity type for entity Extension 4 was not initialized!
[ 395.493414] uvcvideo 1-12:1.0: Entity type for entity Extension 6 was not initialized!
[ 395.493419] uvcvideo 1-12:1.0: Entity type for entity Extension 7 was not initialized!
[ 395.493424] uvcvideo 1-12:1.0: Entity type for entity Processing 2 was not initialized!
[ 395.493428] uvcvideo 1-12:1.0: Entity type for entity Extension 3 was not initialized!
[ 395.493432] uvcvideo 1-12:1.0: Entity type for entity Camera 1 was not initialized!
[ 395.493721] input: UVC Camera (046d:0825) as /devices/pci0000:00/0000:00:14.0/usb1/1-12/1-12:1.0/input/input24
[ 395.494123] snd-usb-audio 1-12:1.2: cannot find the slot for index 1 (range 0-1), error: -16
[ 395.494132] usb 1-12: cannot create card instance 0
[ 395.494142] snd-usb-audio: probe of 1-12:1.2 failed with error -16
$ pacman -Ss alsa
extra/alsa-firmware 1.0.29-1
ALSA firmware package
extra/alsa-lib 1.1.2-1 [installed]
An alternative implementation of Linux sound support
extra/alsa-oss 1.0.28-1
OSS compatibility library
extra/alsa-plugins 1.1.1-1 [installed]
Extra alsa plugins
extra/alsa-tools 1.1.0-2
Advanced tools for certain sound cards
extra/alsa-utils 1.1.2-1 [installed]
An alternative implementation of Linux sound support
extra/alsaplayer 0.99.81-8
A heavily multi-threaded PCM player that tries to excercise the ALSA library and driver quite a bit
extra/gnome-alsamixer 0.9.7-2
Gnome ALSA mixer
extra/pulseaudio-alsa 2-3 [installed]
ALSA Configuration for PulseAudio
...
multilib/lib32-alsa-lib 1.1.2-1 [installed]
An alternative implementation of Linux sound support (32 bit)
multilib/lib32-alsa-oss 1.0.28-1
OSS compatibility library (32 bit)
multilib/lib32-alsa-plugins 1.1.1-1
Extra alsa plugins (32-bit)
Other packages aren't so interesting I guess.
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