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It sometimes happens, just like now, that I am unable to play any
youtube or local file - when I click play, the progress bar does not
move and there is no sound. I have to unplug and plug in the USB cable
of the Saffire one time or several times to make it work again.

It happened again and the report was made at that moment.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.8.0-59.66~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-59-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC2:  michal     1327 F.... pulseaudio
 /dev/snd/pcmC2D0p:   michal    52842 F...m speaker-test
 /dev/snd/controlC0:  michal     1327 F.... pulseaudio
 /dev/snd/controlC1:  michal     1327 F.... pulseaudio
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sat Jul 17 18:49:15 2021
InstallationDate: Installed on 2021-06-16 (30 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 
(20210209.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:USB failed
Symptom_AlsaPlaybackTestStderr: F a i l u r e   t o   r e s u m e :   I n v a l 
i d   a r g u m e n t
Symptom_Card: Saffire 6 - Saffire 6 USB
Symptom_Type: No sound at all
Title: [USB-Audio - Saffire 6 USB, playback] No sound at all
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/25/2019
dmi.bios.release: 5.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.80
dmi.board.asset.tag: Default string
dmi.board.name: Z390-A PRO (MS-7B98)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr1.80:bd12/25/2019:br5.13:svnMicro-StarInternationalCo.,Ltd.:pnMS-7B98:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnZ390-APRO(MS-7B98):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:
dmi.product.family: Default string
dmi.product.name: MS-7B98
dmi.product.sku: Default string
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.

** Affects: alsa-driver (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal
-- 
[USB-Audio - Saffire 6 USB, playback] No sound at all - unable to play any 
audio, but it works after unplugging and plugging in the device
https://bugs.launchpad.net/bugs/1936721
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