Got sound after resume. Still: here's the output.

11:21:55	Verbose debugging enabled (on console 0)
11:21:55	adding plugin /usr/lib/x86_64-linux-gnu/fwupd-plugins-1/libfu_plugin_steelseries.so
11:21:55	adding plugin /usr/lib/x86_64-linux-gnu/fwupd-plugins-1/libfu_plugin_test.so
11:21:55	performing init() on test
11:21:55	Loading fallback values from /etc/fwupd.conf
11:21:55	adding udev device: /sys/devices/pci0000:00/0000:00:03.0/0000:03:00.0
11:21:55	fixing GUID 0x10de:0x1401->73ac5e23-4c05-513b-8626-d1c942d9f73b
11:21:55	emit added from Udev: ro__sys_devices_pci0000_00_0000_00_03_0_0000_03_00_0
11:21:55	using e975765e-c505-5764-8f9d-3881db20dc21 for USB\VID_1235&PID_801C
11:21:55	emit added from DFU: usb:00:01:01
11:21:55	emit added from UEFI: UEFI-7039436b-6acf-433b-86a1-368ec2ef7e1f-dev0
11:21:55	emit added from USB: usb:00:01:02:03
11:21:55	emit added from USB: usb:00:01:02:02
11:21:55	emit added from USB: usb:00:01:01
11:21:55	already added usb:00:01:01 by DFU, ignoring same device from USB
################################################################################       @0460ms AsStore:load 460ms
################################################################################       @0460ms AsStore:load{per-system} 460ms
##                                                                                     @0016ms AsStore:app-info{/var/lib/app-info/yaml/nl.archive.ubuntu.com_ubuntu_dists_xenial_multiverse_dep11_Components-amd64.yml.gz} 13ms
##                                                                                     @0016ms AsStore:store-from-file 13ms
   ####################                                                                @0138ms AsStore:app-info{/var/lib/app-info/yaml/nl.archive.ubuntu.com_ubuntu_dists_xenial_main_dep11_Components-amd64.yml.gz} 119ms
   ####################                                                                @0138ms AsStore:store-from-file 119ms
                        ####                                                           @0164ms AsStore:app-info{/var/lib/app-info/yaml/nl.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_dep11_Components-amd64.yml.gz} 24ms
                        ####                                                           @0164ms AsStore:store-from-file 24ms
                            ##################################################         @0453ms AsStore:app-info{/var/lib/app-info/yaml/nl.archive.ubuntu.com_ubuntu_dists_xenial_universe_dep11_Components-amd64.yml.gz} 289ms
                            ##################################################         @0453ms AsStore:store-from-file 289ms
                                                                                  ##   @0490ms FuMain:coldplug 17ms
                                                                                  #    @0480ms FuMain:coldplug{Udev} 8ms
                                                                                   #   @0480ms FuProviderUdev:coldplug{pci} 5ms
                                                                                    #  @0490ms FuMain:coldplug{USB} 8ms
11:21:55	FuMain: acquired name: org.freedesktop.fwupd
11:21:55	devices now in store:
11:21:55	1	com.steelseries.rival-legacy.firmware	Rival SteelSeries
11:21:55	2	UEFI-dummy-dev0	UEFI Updates
11:21:55	3	com.via.VL811.firmware	VL811 Firmware
11:21:55	4	com.via.VL811+.firmware	VL811+ Firmware
11:21:55	5	com.via.VL812.firmware	VL812 Firmware
11:21:55	6	com.via.VL812_B2.firmware	VL812 B2 Firmware
11:21:55	7	com.dell.uefi124c207d.firmware	XPS 15 9550/Precision 5510 System Update
11:21:55	8	com.dell.uefi33773727.firmware	XPS 13 9350 System Update
11:21:55	9	com.dell.uefi43ca3264.firmware	OptiPlex 7440 AIO System Update
11:21:55	10	com.dell.uefia0a3aa54.firmware	Embedded Box PC 5000 System Update
11:21:55	11	com.dell.uefiaee2604a.firmware	Embedded Box PC 3000 System Update
11:21:55	12	com.dell.uefie0f614ed.firmware	Edge Gateway 5000/5100 System Update
11:21:55	13	com.hughski.ColorHug.firmware	ColorHug
11:21:55	14	com.hughski.ColorHug2.firmware	ColorHug2
11:21:55	15	com.hughski.ColorHugALS.firmware	ColorHugALS
11:24:08	emit removed from USB: usb:00:01:01
11:24:08	ignoring duplicate removal from USB
11:24:11	using e975765e-c505-5764-8f9d-3881db20dc21 for USB\VID_1235&PID_801C
11:24:11	waiting a small time for other providers
11:24:12	emit added from USB: usb:00:01:01
11:24:12	already added usb:00:01:01 by DFU, ignoring same device from USB