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I am encountering some very bizarre and difficult to reliably replicate
issues.
I am using a Focusrite Scarlett 2i2 USB audio interface, and am having a
number of issues that I did not have in older version of ubuntu (these
issues started occuring sometime in 19.04-19.10, can't remember which).
I am having three major issues. Number one is, if USB autosuspend is
enabled, it will stop working completely until reboot after anywhere
from a few minutes to several hours. Reconnecting the device does not
fix it and it seems to not power on at all, with dmesg reporting a
"usb_set_interface failed -110" error. Sometimes this bug can be
recreated by manually disconnecting and reconnecting the device, however
I was unable to replicate it in this manner at the time of filing the
bug.
Another (presumably related) issue I am having is that if I reconnect
the device and it doesn't fail, it outputs very crackly audio, as if the
bitrate or sample rate were set incorrectly. This persists until a
restart of pulseaudio. Previously, I had a similar bug where it would
randomly start doing the crackly audio thing until reconnecting the
device and in this case a restart of pulse did *not* fix the problem. I
am unsure if this issue still happens as it was fairly rare.
The third problem is that sometimes when performing a suspend/wake
cycle, the interface will power cycle several times, in intervals of
15-30 seconds or so before staying on properly.
As previously mentioned, these issues are fairly new and did not occur
in older versions of ubuntu. I have confirmed that the audio interface
works fine under windows.
ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun May 10 14:09:28 2020
InstallationDate: Installed on 2020-05-08 (2 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_Card: USB-Audio - microKEY-37
Symptom_PulseAudioLog:
Symptom_Type: Sound works for a while, then breaks
Title: [USB-Audio - Scarlett 2i2 USB, playback] fails after a while
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/19/2018
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P5.40
dmi.board.name: AB350 Gaming K4
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP5.40:bd12/19/2018:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnAB350GamingK4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug focal
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[USB-Audio - Scarlett 2i2 USB, playback] fails after a while
https://bugs.launchpad.net/bugs/1877887
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