No initial sound after I plugged in a webcam

[Shase]

Hi. First time poster, and a newbie to linux. So bear with me.

I have MX Linux 18.3 with KDE Plasma. I use a Steelseries Arctis 7 for sound. Before it could work with stereo, I had to change some of the Pulseaudio configfiles. All worked well until i plugged in my webcam a few days, a Logitech c922. Now when I boot and log into KDE, my computer has no sound, as in the icon for volumen shows at the taskbar, with i - after it.. The settings shows no sound devices at all. If I boot with the webcam unplugged, then the sound will work again in 2. or 3. startup attempts.

If I log in to KDE with the webcam plugged in, then I can log out, and into xfce4. Then there is sound devices again. The sound devices stays on if I then log out off xfce4 and into KDE again. While in xfce4 my volume control does not work. But it does i KDE.

I have noticed that my system some times shows "usb device fail" at startup some times after I got my webcam. But not allways.

[Stevo]

If you want to try installing an additional kernel like Liquorix 5.2 and testing it when running that, we could rule out it being related to the kernel version.

Otherwise, we could investigate if killing and restarting pulseaudio is any help, or if any error messages show up in the boot log or dmesg when booting with it plugged in.

[Shase]

I think there might be a hint in my boot log since I saw the usb fail message. I have tried to copy some of it here:

put/input29
[ 3.683481] usbcore: registered new interface driver uvcvideo
[ 3.683481] USB Video Class driver (1.1.1)
[ 3.888199] usbcore: registered new interface driver snd-usb-audio
[ 5.000924] Adding 2097148k swap on /dev/sdc3. Priority:-2 extents:1 across:2097148k SSFS
[ 5.010712] EXT4-fs (sdc2): re-mounted. Opts: (null)
[ 5.092233] device-mapper: uevent: version 1.0.3
[ 5.092279] device-mapper: ioctl: 4.39.0-ioctl (2018-04-03) initialised: dm-devel@redhat.com
[ 5.192296] lp: driver loaded but no devices found
[ 5.205702] ppdev: user-space parallel port driver
[ 5.234066] loop: module loaded
[ 5.259586] nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 390.116 Sun Jan 27 06:30:32 PST 2019
[ 5.282939] [drm] [nvidia-drm] [GPU ID 0x00000200] Loading driver
[ 5.282940] [drm] Initialized nvidia-drm 0.0.0 20160202 for 0000:02:00.0 on minor 0
[ 5.407154] RPC: Registered named UNIX socket transport module.
[ 5.407154] RPC: Registered udp transport module.
[ 5.407155] RPC: Registered tcp transport module.
[ 5.407155] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 5.410301] FS-Cache: Loaded
[ 5.418128] FS-Cache: Netfs 'nfs' registered for caching
[ 5.426313] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
[ 5.529646] input: ACPI Virtual Keyboard Device as /devices/virtual/input/input30
[ 6.696967] alg: No test for fips(ansi_cprng) (fips_ansi_cprng)
[ 6.713183] Bluetooth: Core ver 2.22
[ 6.713195] NET: Registered protocol family 31
[ 6.713196] Bluetooth: HCI device and connection manager initialized
[ 6.713198] Bluetooth: HCI socket layer initialized
[ 6.713200] Bluetooth: L2CAP socket layer initialized
[ 6.713204] Bluetooth: SCO socket layer initialized
[ 6.723078] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 6.723079] Bluetooth: BNEP filters: protocol multicast
[ 6.723082] Bluetooth: BNEP socket layer initialized
[ 6.773860] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 6.774264] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[ 6.775039] alx 0000:04:00.0 eth0: NIC Up: 1 Gbps Full
[ 6.775253] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 7.241727] resource sanity check: requesting [mem 0x000c0000-0x000fffff], which spans more than PCI Bus 0000:00 [mem 0x000d0000-0x000d3fff window]
[ 7.241854] caller _nv001168rm+0xe3/0x1d0 [nvidia] mapping multiple BARs
[ 19.912582] fuse init (API version 7.27)
[ 22.509818] usb 2-6: reset high-speed USB device number 5 using xhci_hcd
[ 22.636971] usb 2-6: device firmware changed
[ 22.636997] usb 2-6: USB disconnect, device number 5
[ 22.638834] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.638851] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.638864] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.638948] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639011] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639183] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639196] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639207] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639261] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639320] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639542] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639587] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639629] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639713] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.639797] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640096] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640143] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640185] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640263] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640348] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640448] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640461] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640472] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640524] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640583] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640679] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640691] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640702] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640753] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640811] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640949] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.640988] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641026] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641100] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641183] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641387] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641430] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641470] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641550] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641636] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641860] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641873] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641884] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641936] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.641995] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642201] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642214] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642225] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642277] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642336] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642583] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642623] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642674] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642765] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.642849] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.643208] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.643277] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.643344] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.643451] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.643539] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646076] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646090] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646102] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646154] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646213] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646305] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646317] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646328] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646379] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646438] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646577] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646617] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646662] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646754] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.646846] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.647075] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.647119] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.647160] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.647258] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.647348] usb 2-6: 3:3: usb_set_interface failed (-19)
[ 22.762645] usb 2-6: new high-speed USB device number 6 using xhci_hcd
[ 22.892699] usb 2-6: New USB device found, idVendor=046d, idProduct=085c, bcdDevice= 0.16
[ 22.892700] usb 2-6: New USB device strings: Mfr=0, Product=2, SerialNumber=1
[ 22.892701] usb 2-6: Product: C922 Pro Stream Webcam
[ 22.892702] usb 2-6: SerialNumber: 4CF2907F
[ 22.893319] uvcvideo: Found UVC 1.00 device C922 Pro Stream Webcam (046d:085c)
[ 22.894217] uvcvideo 2-6:1.0: Entity type for entity Processing 3 was not initialized!
[ 22.894218] uvcvideo 2-6:1.0: Entity type for entity Extension 6 was not initialized!
[ 22.894219] uvcvideo 2-6:1.0: Entity type for entity Extension 12 was not initialized!
[ 22.894220] uvcvideo 2-6:1.0: Entity type for entity Camera 1 was not initialized!
[ 22.894221] uvcvideo 2-6:1.0: Entity type for entity Extension 8 was not initialized!
[ 22.894221] uvcvideo 2-6:1.0: Entity type for entity Extension 9 was not initialized!
[ 22.894222] uvcvideo 2-6:1.0: Entity type for entity Extension 10 was not initialized!
[ 22.894223] uvcvideo 2-6:1.0: Entity type for entity Extension 11 was not initialized!
[ 22.894265] input: C922 Pro Stream Webcam as /devices/pci0000:00/0000:00:14.0/usb2/2-6/2-6:1.0/input/input31
[ 44.578042] snd_hda_codec_hdmi hdaudioC1D0: HDMI: invalid ELD data byte 7
[ 70.975417] snd_hda_codec_hdmi hdaudioC1D0: HDMI: invalid ELD data byte 5
[ 97.631019] resource sanity check: requesting [mem 0x000c0000-0x000fffff], which spans more than PCI Bus 0000:00 [mem 0x000d0000-0x000d3fff window]
[ 97.631140] caller _nv001168rm+0xe3/0x1d0 [nvidia] mapping multiple BARs
[ 836.603608] usb 2-6: reset high-speed USB device number 6 using xhci_hcd

[Shase]

Tried installing Liquorix kernel 5.2. There my computer loads the start-up screen, then says "usb 2.6.1 device load error". Then nothing more happens. It just hangs at start-up.

[Stevo]

Well, yes, since you're using the Nvidia driver, you need to upgrade that to our patched 4.18.74 version from the test repo. You got an error message saying that the driver build failed with the new kernel install terminal word salad that flew by, but maybe you missed it.

You should be able to upgrade it by using the MX package installer, test repo tab, and search for "nvidia" and look for the upgrades to installed packages.

[Shase]

Ok. I would never have thought of the nvidia driver. Was sure it was an audio related problem.

I will try the test driver.

Thank you for the suggestion.

[Stevo]

I mean that you can't get a GUI with the new 5.2 kernel until you get a version of the Nvidia video driver you're using to build on it. I don't think it has anything to do with the audio problem.