This is what I got after running 1) sudo killall fwupd 2) sudo /usr/lib/x86_64-linux-gnu/fwupd/fwupd -v 2>&1 | tee fwupd_debug.log
21:57:58 Verbose debugging enabled (on console 0) 21:57:58 adding plugin /usr/lib/x86_64-linux-gnu/fwupd-plugins-1/libfu_plugin_steelseries.so 21:57:58 adding plugin /usr/lib/x86_64-linux-gnu/fwupd-plugins-1/libfu_plugin_test.so 21:57:58 performing init() on test 21:57:58 Loading fallback values from /etc/fwupd.conf 21:57:58 adding udev device: /sys/devices/pci0000:00/0000:00:02.0/0000:01:00.0 21:57:58 fixing GUID 0x10de:0x1040->693025a1-4a7d-53b8-864e-c7f3e5866ec0 21:57:58 emit added from Udev: ro__sys_devices_pci0000_00_0000_00_02_0_0000_01_00_0 Failed to coldplug: UEFI firmware updating not supported *** 21:57:58 Failed to coldplug: UEFI firmware updating not supported *** 21:57:58 emit added from USB: usb:00:04 21:57:58 emit added from USB: usb:00:03 ############################################################################### @0551ms AsStore:load 551ms ############################################################################### @0551ms AsStore:load{per-system} 551ms # @0005ms AsStore:app-info{/usr/share/app-info/xmls/org.freedesktop.fwupd.xml} 5ms # @0022ms AsStore:app-info{/var/lib/app-info/yaml/in.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_dep11_Components-amd64.yml.gz} 11ms # @0022ms AsStore:store-from-file 11ms ### @0046ms AsStore:app-info{/var/lib/app-info/yaml/in.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_dep11_Components-amd64.yml.gz} 23ms ### @0046ms AsStore:store-from-file 23ms ########################################################## @0452ms AsStore:app-info{/var/lib/app-info/yaml/in.archive.ubuntu.com_ubuntu_dists_xenial_universe_dep11_Components-amd64.yml.gz} 406ms ########################################################## @0452ms AsStore:store-from-file 406ms ############# @0547ms AsStore:app-info{/var/lib/app-info/yaml/in.archive.ubuntu.com_ubuntu_dists_xenial_main_dep11_Components-amd64.yml.gz} 94ms ############# @0547ms AsStore:store-from-file 94ms ### @0593ms FuMain:coldplug 24ms ## @0584ms FuMain:coldplug{Udev} 15ms # @0578ms FuProviderUdev:coldplug{usb} 9ms # @0584ms FuProviderUdev:coldplug{pci} 5ms # @0593ms FuMain:coldplug{USB} 8ms # @0593ms FuProviderUsb:added{258a:0001} 5ms 21:57:58 FuMain: acquired name: org.freedesktop.fwupd 21:57:59 devices now in store: 21:57:59 1 com.steelseries.rival-legacy.firmware Rival SteelSeries 21:57:59 2 UEFI-dummy-dev0 UEFI Updates 21:57:59 3 com.via.VL811.firmware VL811 Firmware 21:57:59 4 com.via.VL811+.firmware VL811+ Firmware 21:57:59 5 com.via.VL812.firmware VL812 Firmware 21:57:59 6 com.via.VL812_B2.firmware VL812 B2 Firmware 21:57:59 7 com.dell.uefi124c207d.firmware XPS 15 9550/Precision 5510 System Update 21:57:59 8 com.dell.uefi33773727.firmware XPS 13 9350 System Update 21:57:59 9 com.dell.uefi43ca3264.firmware OptiPlex 7440 AIO System Update 21:57:59 10 com.dell.uefia0a3aa54.firmware Embedded Box PC 5000 System Update 21:57:59 11 com.dell.uefiaee2604a.firmware Embedded Box PC 3000 System Update 21:57:59 12 com.dell.uefie0f614ed.firmware Edge Gateway 5000/5100 System Update 21:57:59 13 com.hughski.ColorHug.firmware ColorHug 21:57:59 14 com.hughski.ColorHug2.firmware ColorHug2 21:57:59 15 com.hughski.ColorHugALS.firmware ColorHugALS -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to alsa-driver in Ubuntu. https://bugs.launchpad.net/bugs/1574079 Title: USB audio device is not recognized after startup in 16.04 Status in alsa-driver package in Ubuntu: Invalid Status in fwupd package in Ubuntu: Confirmed Bug description: Hi @all, I used the same USB audio device in all previous Ubuntu versions (Focusrite Scarlet 2i2). It is supposed to be class compliant and works an all distros flawless (even RPI2 and OSMC). After upgrading from 15.10 to 16.04 it stopped to work: after start-up it does not show up as an audio device at all (also not recognized by aplay -l). I can workaround this by unplugging it and plugging it in again after Ubuntu booted up (strangely 2 times unplug/re-plug). After 2nd time plugging it in again it shows up and works great without any further issues until next restart. Maybe worth to note that I recognized today that fwupd uses continuously 100% CPU load, so I just killed it today. My Hardware (Main-board/CPU) is a bit older (Intel E8400), so could probably be some compatibility issue... regards, Tobias ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic i686 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.1-0ubuntu2 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/pcmC1D0p: tobias 1553 F...m pulseaudio /dev/snd/controlC1: tobias 1553 F.... pulseaudio /dev/snd/controlC0: tobias 1553 F.... pulseaudio /dev/snd/controlC2: tobias 1553 F.... pulseaudio CurrentDesktop: Unity Date: Sat Apr 23 20:09:04 2016 InstallationDate: Installed on 2015-09-19 (217 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422) PackageArchitecture: all SourcePackage: alsa-driver UpgradeStatus: Upgraded to xenial on 2016-04-22 (0 days ago) dmi.bios.date: 09/30/2008 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 1238 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: P5B-Deluxe dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Asset-1234567890 dmi.chassis.type: 3 dmi.chassis.vendor: Chassis Manufacture dmi.chassis.version: Chassis Version dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1238:bd09/30/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B-Deluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion: dmi.product.name: System Product Name dmi.product.version: System Version dmi.sys.vendor: System manufacturer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1574079/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp