Re: Logitech C922 webcam

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On October 1, 2020 11:58:11 AM EDT, Bruce Ferrell <bferrell@xxxxxxxxxxxx> wrote:
>On 9/30/20 8:52 AM, H wrote:
>> 00:14.0 USB controller: Intel Corporation 200 Series/Z370 Chipset
>Family USB 3.0 xHCI Controller
>My system has these:
>
>00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
>Family USB xHCI (rev 05)
>00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
>Family USB EHCI #2 (rev 05)
>00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
>Family USB EHCI #1 (rev 05)
>
>lspci -s 00:14.0 -v
>00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
>Family USB xHCI (rev 05) (prog-if 30 [XHCI])
>         Subsystem: ASUSTeK Computer Inc. Device 201f
>         Flags: bus master, medium devsel, latency 0, IRQ 25
>         Memory at dd600000 (64-bit, non-prefetchable) [size=64K]
>         Capabilities: [70] Power Management version 2
>         Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
>         Kernel driver in use: xhci_hcd
>         Kernel modules: xhci_pci
>
>lspci -s 00:1a.0 -v
>00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
>Family USB EHCI #2 (rev 05) (prog-if 20 [EHCI])
>         Subsystem: ASUSTeK Computer Inc. Device 201f
>         Flags: bus master, medium devsel, latency 0, IRQ 16
>         Memory at dd618000 (32-bit, non-prefetchable) [size=1K]
>         Capabilities: [50] Power Management version 2
>         Capabilities: [58] Debug port: BAR=1 offset=00a0
>         Capabilities: [98] PCI Advanced Features
>         Kernel driver in use: ehci-pci
>         Kernel modules: ehci_pci
>
>lspci -s 00:1d.0 -v
>00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
>Family USB EHCI #1 (rev 05) (prog-if 20 [EHCI])
>         Subsystem: ASUSTeK Computer Inc. Device 201f
>         Flags: bus master, medium devsel, latency 0, IRQ 23
>         Memory at dd617000 (32-bit, non-prefetchable) [size=1K]
>         Capabilities: [50] Power Management version 2
>         Capabilities: [58] Debug port: BAR=1 offset=00a0
>         Capabilities: [98] PCI Advanced Features
>         Kernel driver in use: ehci-pci
>         Kernel modules: ehci_pci
>
>These are my kernel modules:
>
>lsmod | grep usb
>btusb                  53248  0
>btrtl                  16384  1 btusb
>btbcm                  16384  1 btusb
>btintel                20480  1 btusb
>bluetooth             589824  41 btrtl,btintel,bnep,btbcm,rfcomm,btusb
>snd_usb_audio         278528  1
>snd_usbmidi_lib        36864  1 snd_usb_audio
>snd_hwdep              16384  2 snd_hda_codec,snd_usb_audio
>snd_rawmidi            40960  1 snd_usbmidi_lib
>snd_pcm               143360  5
>snd_hda_intel,snd_hda_codec,snd_usb_audio,snd_hda_core,snd_hda_codec_hdmi
>snd                    98304  23 
>snd_hda_intel,snd_hwdep,snd_seq,snd_hda_codec,snd_usb_audio,snd_timer,snd_rawmidi,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_usbmidi_lib,snd_seq_device,snd_hda_codec_realtek,snd_pcm
>usbhid                 57344  0
>usbcore               290816  9
>uvcvideo,usbhid,snd_usb_audio,ehci_hcd,xhci_pci,snd_usbmidi_lib,btusb,xhci_hcd,ehci_pci
>
>
>This line is important:
>
>usbcore               290816  9
>uvcvideo,usbhid,snd_usb_audio,ehci_hcd,xhci_pci,snd_usbmidi_lib,btusb,xhci_hcd,ehci_pci
>
>Notice the last two entries:  xhci_hcd and ehci_pci
>
>Those correspond to:
>
>   for my two usb 2 controllers:
>
>         Kernel driver in use: xhci_hcd
>         Kernel modules: xhci_pci
>
>   for my single usb 3 controller:
>
>         Kernel driver in use: xhci_hcd
>         Kernel modules: xhci_pci
>
>
>from your lspci:
>
>00:14.0 USB controller: Intel Corporation 200 Series/Z370 Chipset
>Family USB 3.0 xHCI Controller
>
>This is the sole USB controller in your system and it's a USB 3
>controller
>
>so... in your case let's do:
>
>sudo lspci -s 00:14.0 -v
>
>then try:
>
>sudo modprobe usbcore
>
>and repeat:
>
>sudo lspci -s 00:14.0 -v
>
>see if the Kernel driver/module lines change.  If they do, plug the
>camera in and check for it to be recognized in lsusb
>
>
>
>
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Thank you. Unfortunately I will not have access to this computer for some time, will let you know when I can try what you suggest.
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