After some testing on older kernels I was indeed able to recreate these issues. The only thing I can think of is that somehow the hardware has partially degraded such that it causes some issues with however the drivers are implemented in linux but not in windows. I think it may have something to do with current protection, because when reconnecting it to the same port it does not power back on, but if I switch ports it does. Although, if I switch ports it still does not work even though it does power on. It also causes pulseaudio to lock up until I disconnect the device, which causes many other applications to hang when they try to play audio.
I was able to get it working well enough by dedicating a powered USB hub to the audio interface, it has been a couple days with no issues, which is what leads me to believe it is something related to power. I'm not sure if this issue is fixable, or even worth dedicating resources to, but if this points to some deficiency in the kernel seeing as it *does* work fine in windows, I would be happy to provide any further diagnostics required to get a better idea of what's happening. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1877887 Title: [USB-Audio - Scarlett 2i2 USB, playback] fails after a while Status in linux package in Ubuntu: Incomplete Bug description: 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. EDIT: Ignore the two more issue below, however I'm leaving them in the post in case they end up being relevant. 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. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27 Architecture: amd64 CasperMD5CheckResult: skip DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2020-05-08 (2 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) IwConfig: enp37s0 no wireless extensions. lo no wireless extensions. MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-29-generic root=UUID=6108192f-9dc3-480d-9a32-517609064dcd ro rootflags=subvol=@ quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30 RelatedPackageVersions: linux-restricted-modules-5.4.0-29-generic N/A linux-backports-modules-5.4.0-29-generic N/A linux-firmware 1.187 RfKill: Tags: focal Uname: Linux 5.4.0-29-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: sudo WifiSyslog: _MarkForUpload: True 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. 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