Poor / Strange 6900xt performance on kernel 5.14

Hello, currently trouble shooting performance problems on kernel 5.14. I am getting unstable frame-rates and horrible frame-time lag, the frame-time lag is especially interesting as if I move my mouse around frame-time will spike to around 30+ milliseconds, with no mouse movement frame-time settles but overall FPS is about half of what I have been getting prior to 5.14.

I poked around a bit at tried forcing power profiles to high performance with no change. Reverting to kernel 5.13 restores expected performance. I am fine with staying on 5.13 but I am concerned about how long I can if the root issue is not resolved prior to 5.13’s EOL. My hardware does not work well with the latest 5.10 LTS.

I understand this is an upstream issue but I am also unsure about where to file a bug report / or where most of these conversations are happening.

This issue persists. So as I had feared I am stuck between what I think are broken (for 6900xt?) drivers on 5.14, I can no longer use 5.13 due to EOL, and 5.10 is incompatible with my hardware.

inxi (under 5.13)

~]$ inxi --admin --verbosity=7 --filter --no-host --width
System:
  Kernel: 5.13.19-2-MANJARO x86_64 bits: 64 compiler: gcc v: 11.1.0
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.13-x86_64
  root=UUID=967fbe57-dccb-4c21-97c3-6538726a1c72 rw
  cryptdevice=UUID=27fdcc04-1c50-4f1e-8d76-a7df28ed5ac8:luks-27fdcc04-1c50-4f1e-8d76-a7df28ed5ac8
  root=/dev/mapper/luks-27fdcc04-1c50-4f1e-8d76-a7df28ed5ac8 apparmor=1
  security=apparmor
  resume=/dev/mapper/luks-5abbce8b-5d41-49dd-85ee-585f050a6573
  udev.log_priority=3 amdgpu.ppfeaturemask=0xffffffff
  Desktop: KDE Plasma 5.22.5 tk: Qt 5.15.2 wm: kwin_x11 vt: 1 dm: SDDM
  Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Desktop System: ASUS product: N/A v: N/A serial: <filter>
  Mobo: ASUSTeK model: ROG STRIX TRX40-XE GAMING v: Rev 1.xx serial: <filter>
  UEFI: American Megatrends v: 1402 date: 01/15/2021
Memory:
  RAM: total: 125.66 GiB used: 7.85 GiB (6.3%)
  RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: 24-Core (3-Die) model: AMD Ryzen Threadripper 3960X bits: 64
  type: MT MCP MCM arch: Zen 2 family: 17 (23) model-id: 31 (49) stepping: 0
  microcode: 8301039 cache: L2: 12 MiB bogomips: 374544
  Speed: 3900 MHz min/max: 2200/3900 MHz boost: disabled Core speeds (MHz):
  1: 3900 2: 3900 3: 3900 4: 3900 5: 3900 6: 3900 7: 3900 8: 3900 9: 3900
  10: 3900 11: 3900 12: 3900 13: 3900 14: 3900 15: 3900 16: 3900 17: 3900
  18: 3900 19: 3900 20: 3900 21: 3900 22: 3900 23: 3900 24: 3900 25: 3900
  26: 3900 27: 3900 28: 3900 29: 3900 30: 3900 31: 3900 32: 3900 33: 3900
  34: 3900 35: 3900 36: 3900 37: 3900 38: 3900 39: 3899 40: 3900 41: 3900
  42: 3900 43: 3900 44: 3900 45: 3900 46: 3900 47: 3900 48: 3900
  Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1
  bmi2 bpext cat_l3 cdp_l3 clflush clflushopt clwb clzero cmov cmp_legacy
  constant_tsc cpb cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total cqm_occup_llc
  cr8_legacy cx16 cx8 de decodeassists extapic extd_apicid f16c flushbyasid
  fma fpu fsgsbase fxsr fxsr_opt ht hw_pstate ibpb ibs irperf lahf_lm lbrv lm
  mba mca mce misalignsse mmx mmxext monitor movbe msr mtrr mwaitx nonstop_tsc
  nopl npt nrip_save nx osvw overflow_recov pae pat pausefilter pclmulqdq
  pdpe1gb perfctr_core perfctr_llc perfctr_nb pfthreshold pge pni popcnt pse
  pse36 rdpid rdpru rdrand rdseed rdt_a rdtscp rep_good sep sev sev_es sha_ni
  skinit smap smca sme smep ssbd sse sse2 sse4_1 sse4_2 sse4a ssse3 stibp
  succor svm svm_lock syscall tce topoext tsc tsc_scale umip v_spec_ctrl
  v_vmsave_vmload vgif vmcb_clean vme vmmcall wbnoinvd wdt xgetbv1 xsave
  xsavec xsaveerptr xsaveopt xsaves
  Vulnerabilities: Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: spec_store_bypass
  mitigation: Speculative Store Bypass disabled via prctl and seccomp
  Type: spectre_v1
  mitigation: usercopy/swapgs barriers and __user pointer sanitization
  Type: spectre_v2 mitigation: Full AMD retpoline, IBPB: conditional, STIBP:
  conditional, RSB filling
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: AMD Navi 21 [Radeon RX 6900 XT] vendor: XFX Limited driver: amdgpu
  v: kernel bus-ID: 03:00.0 chip-ID: 1002:73af class-ID: 0300
  Display: x11 server: X.Org 1.20.13 compositor: kwin_x11 driver:
  loaded: amdgpu,ati unloaded: modesetting,radeon alternate: fbdev,vesa
  display-ID: :0 screens: 1
  Screen-1: 0 s-res: 4480x1440 s-dpi: 96 s-size: 1185x381mm (46.7x15.0")
  s-diag: 1245mm (49")
  Monitor-1: DisplayPort-0 res: 2560x1440 hz: 60
  Monitor-2: DisplayPort-1 res: 1920x1080 dpi: 93 size: 527x296mm (20.7x11.7")
  diag: 604mm (23.8")
  OpenGL: renderer: AMD Radeon RX 6900 XT (SIENNA_CICHLID DRM 3.41.0
  5.13.19-2-MANJARO LLVM 12.0.1)
  v: 4.6 Mesa 21.2.3 direct render: Yes
Audio:
  Device-1: AMD Navi 21 HDMI Audio [Radeon RX 6800/6800 XT / 6900 XT]
  driver: snd_hda_intel v: kernel bus-ID: 03:00.1 chip-ID: 1002:ab28
  class-ID: 0403
  Device-2: AMD Starship/Matisse HD Audio vendor: ASUSTeK driver: N/A
  alternate: snd_hda_intel bus-ID: 22:00.4 chip-ID: 1022:1487 class-ID: 0403
  Device-3: Sennheiser EPOS GSA 70 type: USB
  driver: hid-generic,snd-usb-audio,usbhid bus-ID: 9-2.2:5 chip-ID: 1395:0300
  class-ID: 0300 serial: <filter>
  Device-4: ASUSTek USB Audio type: USB
  driver: hid-generic,snd-usb-audio,usbhid bus-ID: 9-6:7 chip-ID: 0b05:1917
  class-ID: 0300
  Sound Server-1: ALSA v: k5.13.19-2-MANJARO running: yes
  Sound Server-2: JACK v: 1.9.19 running: no
  Sound Server-3: PulseAudio v: 15.0 running: yes
  Sound Server-4: PipeWire v: 0.3.38 running: yes
Network:
  Device-1: Realtek RTL8125 2.5GbE vendor: ASUSTeK driver: r8169 v: kernel
  port: c000 bus-ID: 43:00.0 chip-ID: 10ec:8125 class-ID: 0200
  IF: enp67s0 state: down mac: <filter>
  Device-2: Intel I211 Gigabit Network vendor: ASUSTeK driver: igb v: kernel
  port: b000 bus-ID: 44:00.0 chip-ID: 8086:1539 class-ID: 0200
  IF: enp68s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
  broadcast: <filter>
  IP v6: <filter> type: noprefixroute scope: link
  Device-3: Intel Wi-Fi 6 AX200 driver: iwlwifi v: kernel bus-ID: 45:00.0
  chip-ID: 8086:2723 class-ID: 0280
  IF: wlp69s0 state: down mac: <filter>
  WAN IP: <filter>
Bluetooth:
  Device-1: Intel AX200 Bluetooth type: USB driver: btusb v: 0.8 bus-ID: 7-6:5
  chip-ID: 8087:0029 class-ID: e001
  Report: rfkill ID: hci0 rfk-id: 1 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
  Device-1: luks-27fdcc04-1c50-4f1e-8d76-a7df28ed5ac8 maj-min: 254:0
  type: LUKS dm: dm-0 size: 1.68 TiB
  Components:
  p-1: nvme0n1p2 maj-min: 259:2 size: 1.68 TiB
  Device-2: luks-5abbce8b-5d41-49dd-85ee-585f050a6573 maj-min: 254:1
  type: LUKS dm: dm-1 size: 138.3 GiB
  Components:
  p-1: nvme0n1p3 maj-min: 259:3 size: 138.3 GiB
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 1.82 TiB used: 811.07 GiB (43.5%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Western Digital
  model: WDS200T1X0E-00AFY0 size: 1.82 TiB block-size: physical: 512 B
  logical: 512 B speed: 63.2 Gb/s lanes: 4 type: SSD serial: <filter>
  rev: 613000WD temp: 48.9 C scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 1.68 TiB size: 1.66 TiB (98.37%) used: 811.07 GiB (47.8%)
  fs: ext4 dev: /dev/dm-0 maj-min: 254:0
  mapped: luks-27fdcc04-1c50-4f1e-8d76-a7df28ed5ac8 label: N/A
  uuid: 967fbe57-dccb-4c21-97c3-6538726a1c72
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
  used: 440 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
  label: NO_LABEL uuid: 9F26-5C4D
Swap:
  Kernel: swappiness: 60 (default) cache-pressure: 100 (default)
  ID-1: swap-1 type: partition size: 138.3 GiB used: 0 KiB (0.0%) priority: -2
  dev: /dev/dm-1 maj-min: 254:1
  mapped: luks-5abbce8b-5d41-49dd-85ee-585f050a6573 label: N/A
  uuid: fc800bb8-e5cb-4537-a792-053289270b01
Unmounted:
  Message: No unmounted partitions found.
USB:
  Hub-1: 1-0:1 info: Full speed (or root) Hub ports: 2 rev: 2.0
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-2: 2-0:1 info: Full speed (or root) Hub ports: 1 rev: 3.1 speed: 10 Gb/s
  chip-ID: 1d6b:0003 class-ID: 0900
  Hub-3: 3-0:1 info: Full speed (or root) Hub ports: 2 rev: 2.0
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-4: 4-0:1 info: Full speed (or root) Hub ports: 2 rev: 3.1 speed: 10 Gb/s
  chip-ID: 1d6b:0003 class-ID: 0900
  Hub-5: 5-0:1 info: Full speed (or root) Hub ports: 2 rev: 2.0
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-6: 6-0:1 info: Full speed (or root) Hub ports: 2 rev: 3.1 speed: 10 Gb/s
  chip-ID: 1d6b:0003 class-ID: 0900
  Hub-7: 7-0:1 info: Full speed (or root) Hub ports: 6 rev: 2.0
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 7-1:2 info: Logitech M105 Optical Mouse type: Mouse
  driver: hid-generic,usbhid interfaces: 1 rev: 2.0 speed: 1.5 Mb/s
  power: 100mA chip-ID: 046d:c077 class-ID: 0301
  Device-2: 7-3:3 info: Corsair K95 RGB Platinum Keyboard [RGP0056]
  type: Keyboard,HID driver: hid-generic,usbhid interfaces: 3 rev: 2.0
  speed: 12 Mb/s power: 500mA chip-ID: 1b1c:1b2d class-ID: 0300
  serial: <filter>
  Hub-8: 7-5:4 info: Genesys Logic Hub ports: 4 rev: 2.0 speed: 480 Mb/s
  power: 100mA chip-ID: 05e3:0610 class-ID: 0900
  Device-1: 7-5.3:6 info: NZXT USB Device type: HID driver: hid-generic,usbhid
  interfaces: 1 rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 1e71:2007
  class-ID: 0300 serial: <filter>
  Device-2: 7-6:5 info: Intel AX200 Bluetooth type: Bluetooth driver: btusb
  interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 100mA chip-ID: 8087:0029
  class-ID: e001
  Hub-9: 8-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.1 speed: 10 Gb/s
  chip-ID: 1d6b:0003 class-ID: 0900
  Hub-10: 9-0:1 info: Full speed (or root) Hub ports: 6 rev: 2.0
  speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-11: 9-1:2 info: Genesys Logic Hub ports: 4 rev: 2.0 speed: 480 Mb/s
  power: 100mA chip-ID: 05e3:0610 class-ID: 0900
  Hub-12: 9-2:3 info: ASMedia ASM1074 High-Speed hub ports: 4 rev: 2.1
  speed: 480 Mb/s power: 100mA chip-ID: 174c:2074 class-ID: 0900
  Device-1: 9-2.2:5 info: Sennheiser EPOS GSA 70 type: Audio,HID
  driver: hid-generic,snd-usb-audio,usbhid interfaces: 6 rev: 2.0
  speed: 12 Mb/s power: 96mA chip-ID: 1395:0300 class-ID: 0300
  serial: <filter>
  Device-2: 9-4:4 info: ASUSTek AURA LED Controller type: HID
  driver: hid-generic,usbhid interfaces: 1 rev: 2.0 speed: 12 Mb/s
  power: 100mA chip-ID: 0b05:1872 class-ID: 0300 serial: <filter>
  Device-3: 9-5:6 info: ASUSTek AURA LED Controller type: HID
  driver: hid-generic,usbhid interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 16mA
  chip-ID: 0b05:18f3 class-ID: 0300 serial: <filter>
  Device-4: 9-6:7 info: ASUSTek USB Audio type: Audio,HID
  driver: hid-generic,snd-usb-audio,usbhid interfaces: 8 rev: 2.0
  speed: 480 Mb/s power: 100mA chip-ID: 0b05:1917 class-ID: 0300
  Hub-13: 10-0:1 info: Full speed (or root) Hub ports: 4 rev: 3.1
  speed: 10 Gb/s chip-ID: 1d6b:0003 class-ID: 0900
  Hub-14: 10-2:2 info: ASMedia ASM1074 SuperSpeed hub ports: 4 rev: 3.0
  speed: 5 Gb/s power: 8mA chip-ID: 174c:3074 class-ID: 0900
Sensors:
  System Temperatures: cpu: 50.2 C mobo: 35.0 C gpu: amdgpu temp: 56.0 C
  mem: 58.0 C
  Fan Speeds (RPM): fan-1: 0 fan-2: 1155 fan-3: 2319 fan-5: 0 fan-6: 0
  fan-7: 1027 gpu: amdgpu fan: 0
Info:
  Processes: 743 Uptime: 11m wakeups: 1 Init: systemd v: 249 tool: systemctl
  Compilers: gcc: 11.1.0 clang: 12.0.1 Packages: 1448 pacman: 1436 lib: 382
  flatpak: 6 snap: 6 Shell: Bash v: 5.1.8 running-in: konsole inxi: 3.3.07