Fixed it! However I'm not sure why the file was created when I'm running on AMD hardware and requiring the use of the APU.
The bug is that a blacklist file was created in: /etc/modprobe.d/blacklist-amdgpu.conf With the following line: blacklist amdgpu That obviously prevented the APU drivers to load up, so the HDMI audio sink could be initialised and prevented GPU rendering. This problem could likely affect multiple people and are unaware if they are on a single display and using speakers connected to the motherboard instead of via other means such as the 3.5mm output, optical, or even via Bluetooth. Since the system worked otherwise. The only symptom people on single displays and not using HDMI audio people would experience is when doing anything CPU or GPU intensive, since I can only presume the CPU is doing all the legwork to render the display instead of the APU. For reference the CPU is a AMD Ryzen 5 3400g with Vega 11 APU, and no dedicated graphics card. If anyone needs any additional information, logs, or anything let me know and I'll be happy to help out where I can. I'm just glad that I got this resolved, but I'd hate for others to experience the same issues while updates trickle down (it could also be months before anyone notices on single display and no HDMI audio setups). -- 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/1912773 Title: [MS-7C52, ATI R6xx HDMI, Digital Out, HDMI] No sound at all, second display not working, cpu/agpu performance dropped considerably Status in amd: New Status in Linux Firmware: New Status in Mutter: New Status in linux package in Ubuntu: Incomplete Bug description: After a recent update, I now have a system that can no longer play audio (via HDMI), my second monitor (DVI) is no longer being picked up, and CPU/AGPU usage has lost a lot of performance (OBS is basically unusable at this point). Whatever has happened with the recent updates has caused the AMD drivers (presumably?) to not work correctly - because it is an AMD Ryzen 5 3400g (with no dedicated graphics card). 1) The release of Ubuntu you are using, via 'lsb_release -rd' or System -> About Ubuntu ``` $ lsb_release -rd Description: Ubuntu 20.04.1 LTS Release: 20.04 ``` 2) The version of the package you are using, via 'apt-cache policy pkgname' or by checking in Software Center Not sure which package would be the cause, however these were the version that were working prior to the update: ``` libnss-systemd:amd64=245.4-4ubuntu3.3 libudev1:i386=245.4-4ubuntu3.3 libudev1:amd64=245.4-4ubuntu3.3 libudev-dev:amd64=245.4-4ubuntu3.3 udev=245.4-4ubuntu3.3 systemd-timesyncd=245.4-4ubuntu3.3 systemd-sysv=245.4-4ubuntu3.3 libpam-systemd:amd64=245.4-4ubuntu3.3 systemd=245.4-4ubuntu3.3 libsystemd0:amd64=245.4-4ubuntu3.3 libsystemd0:i386=245.4-4ubuntu3.3 libapt-pkg6.0:amd64=2.0.2ubuntu0.2 apt=2.0.2ubuntu0.2 apt-utils=2.0.2ubuntu0.2 ubuntu-release-upgrader-gtk=1:20.04.29 ubuntu-release-upgrader-core=1:20.04.29 update-manager=1:20.04.10.1 update-manager-core=1:20.04.10.1 python3-distupgrade=1:20.04.29 python3-update-manager=1:20.04.10.1 update-notifier=3.192.30.3 update-notifier-common=3.192.30.3 libnetplan0:amd64=0.100-0ubuntu4~20.04.3 netplan.io=0.100-0ubuntu4~20.04.3 mutter-common=3.36.6-1ubuntu0.20.04.2 gir1.2-mutter-6:amd64=3.36.6-1ubuntu0.20.04.2 libmutter-6-0:amd64=3.36.6-1ubuntu0.20.04.2 jq=1.6-1 libjq1:amd64=1.6-1 linux-firmware=1.187.7 linux-generic-hwe-20.04=5.8.0.38.43~20.04.23 linux-image-generic-hwe-20.04=5.8.0.38.43~20.04.23 linux-headers-generic-hwe-20.04=5.8.0.38.43~20.04.23 linux-headers-generic=5.4.0.62.65 linux-libc-dev:amd64=5.4.0-62.70 mutter=3.36.6-1ubuntu0.20.04.2 ``` This list was generated with the command: `awk 'BEGIN{ start="0" } { if($0 ~ /Log started: 2021-01-20/) { start="1"} if ( start == "1" && $0 ~ /Unpacking.*over/) {gsub(/[\s\t)( ]+/,"",$5); printf("%s=%s ", $2 , $5)}}' /var/log/apt/term.log` 3) What you expected to happen Sound and video working via HDMI on primary monitor, second monitor displaying (extended) video via DVI. CPU and AGPU being able to render via OBS. 4) What happened instead No sound. No second display. Any CPU or AGPU tasks running slower than normal. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: alsa-base 1.0.25+dfsg-0ubuntu5 ProcVersionSignature: Ubuntu 5.8.0-40.45~20.04.1-generic 5.8.18 Uname: Linux 5.8.0-40-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.14 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC3: hazrpg 3344 F.... pulseaudio /dev/snd/controlC2: hazrpg 3344 F.... pulseaudio /dev/snd/controlC0: hazrpg 3344 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Fri Jan 22 11:51:14 2021 InstallationDate: Installed on 2020-05-22 (244 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) PackageArchitecture: all SourcePackage: alsa-driver Symptom: audio Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic failed Symptom_Card: Raven/Raven2/Fenghuang HDMI/DP Audio Controller - HD-Audio Generic Symptom_Jack: Digital Out, HDMI Symptom_Type: No sound at all Title: [MS-7C52, ATI R6xx HDMI, Digital Out, HDMI] No sound at all UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/18/2019 dmi.bios.release: 5.14 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 2.20 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: A320M-A PRO MAX (MS-7C52) dmi.board.vendor: Micro-Star International Co., Ltd. dmi.board.version: 1.0 dmi.chassis.asset.tag: To be filled by O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: Micro-Star International Co., Ltd. dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2.20:bd09/18/2019:br5.14:svnMicro-StarInternationalCo.,Ltd.:pnMS-7C52:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnA320M-APROMAX(MS-7C52):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0: dmi.product.family: To be filled by O.E.M. dmi.product.name: MS-7C52 dmi.product.sku: To be filled by O.E.M. dmi.product.version: 1.0 dmi.sys.vendor: Micro-Star International Co., Ltd. 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