MT7921K high latency when bluetooth headset is used

[Heðin]

When I use onboard WiFi and Bluetooth headset at the same time, the latency goes from ~30-50ms to 200-6500ms

Motherboard: ASUS TUF GAMING X670E-PLUS WIFI
BIOS: 0809

Kernels tested: Ubuntu 22.10 downstream kernel (5.19) and upstream 6.0.[135]

$ lsb_release -rd
Description: Ubuntu 22.10
Release: 22.10

Also made upstream kernel bz: https://bugzilla.kernel.org/show_bug.cgi?id=216668

ProblemType: Bug
DistroRelease: Ubuntu 22.10
Package: bluez 5.65-0ubuntu1
Uname: Linux 6.0.5-060005-generic x86_64
ApportVersion: 2.23.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Nov 6 15:44:14 2022
InstallationDate: Installed on 2022-10-15 (22 days ago)
InstallationMedia: Ubuntu 22.10 "Kinetic Kudu" - Beta amd64 (20220927.1)
InterestingModules: rfcomm bnep btusb bluetooth
MachineType: ASUS System Product Name
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.0.5-060005-generic root=/dev/mapper/vg_system-lv_root_ubuntu ro quiet splash vt.handoff=7
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: bluez
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/23/2022
dmi.bios.release: 8.9
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0809
dmi.board.asset.tag: Default string
dmi.board.name: TUF GAMING X670E-PLUS WIFI
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0809:bd10/23/2022:br8.9:svnASUS:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnTUFGAMINGX670E-PLUSWIFI:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: ASUS
hciconfig:
 hci0: Type: Primary Bus: USB
  BD Address: 10:6F:D9:DD:4A:B0 ACL MTU: 1021:6 SCO MTU: 240:8
  UP RUNNING PSCAN
  RX bytes:23811976 acl:17760 sco:359584 events:24845 errors:0
  TX bytes:22808883 acl:832 sco:352705 commands:4782 errors:0

[hej (hej-linux-kernel-bugs)]

Created attachment 303139
lshw dump with serials redacted

When I use onboard WiFi and Bluetooth headset at the same time, the latency goes from ~30-50ms to 200-6500ms

Motherboard: ASUS TUF GAMING X670E-PLUS WIFI
BIOS: 0809

Kernels tested: Ubuntu 22.10 downstream kernel (5.19) and upstream 6.0.[135]

I have attached the lshw output

[hej (hej-linux-kernel-bugs)]

Created attachment 303140
journalctl -f when connecting headset with bluetooth

[hej (hej-linux-kernel-bugs)]

Created attachment 303141
dmesg

[hej (hej-linux-kernel-bugs)]

Ubuntu BZ on the matter: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1995798

[Daniel van Vugt (vanvugt)]

2.4GHz wifi networks can and will conflict with Bluetooth which shares similar frequencies. Try using 5GHz for the wifi network if you can.