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I'm running lubuntu 23.10 (Mantic Minotaur) on an HP Chromebook 11A G8
EE, board name 'BARLA', using the current MrChromebox BIOS.

The thing takes ages (+3 min.) to cold boot and play any video. (Plus
there's no sound from the internal speakers, which I knew about,
separate issue, just noting that here for posterity. I pair with a
Bluetooth headset that works fine.) On boot, before the splash screen, I
see in this order, a soft lockup error, the error in the title of this
post, and errors about the audio.

>From journalctl:

Nov 14 09:33:01 uname-barla kernel: watchdog: BUG: soft lockup - CPU#0 stuck 
for 26s! [(udev-worker):115]
Nov 14 09:33:01 uname-barla kernel: [drm] initializing kernel modesetting 
(STONEY 0x1002:0x98E4 0x1002:0x1EB0 0xEB).
Nov 14 09:33:01 uname-barla kernel: kfd kfd: amdgpu: STONEY not supported in kfd

>From inxi:

System:
 Kernel: 6.5.0-10-generic arch: x86_64 bits: 64 compiler: N/A Desktop: LXQt
 v: 1.3.0 Distro: Ubuntu 23.10 (Mantic Minotaur)
Machine:
 Type: Laptop System: Google product: Barla v: rev7
 serial: <superuser required>
 Mobo: Google model: Barla v: rev7 serial: <superuser required>
 UEFI: coreboot v: MrChromebox-4.21.1 date: 10/29/2023
Battery:
 ID-1: BAT0 charge: 19.4 Wh (41.9%) condition: 46.3/47.4 Wh (97.7%)
 volts: 7.5 min: 7.7 model: 333-1D- GH02047 status: discharging
CPU:
 Info: dual core model: AMD A4-9120C RADEON R4 5 COMPUTE CORES 2C+3G bits: 64
 type: MCP arch: Excavator rev: 0 cache: L1: 192 KiB L2: 2 MiB
 Speed (MHz): avg: 1200 min/max: 1200/1600 boost: enabled cores: 1: 1200
 2: 1200 bogomips: 6387
 Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
Graphics:
 Device-1: AMD Stoney [Radeon R2/R3/R4/R5 Graphics] driver: amdgpu v: kernel
 arch: GCN-3 bus-ID: 00:01.0
 Device-2: Quanta HP TrueVision HD Camera driver: uvcvideo type: USB
 bus-ID: 1-1.1:3
 Display: x11 server: X.Org v: 1.21.1.9 driver: X: loaded: amdgpu
 unloaded: fbdev,modesetting,vesa dri: radeonsi gpu: amdgpu
 resolution: 1366x768~60Hz
 API: EGL v: 1.5 drivers: kms_swrast,radeonsi,swrast platforms:
 active: gbm,x11,surfaceless,device inactive: wayland
 API: OpenGL v: 4.5 vendor: amd mesa v: 23.2.1-1ubuntu3 glx-v: 1.4
 direct-render: yes renderer: AMD Radeon R3 Graphics (stoney LLVM 15.0.7 DRM
 3.54 6.5.0-10-generic)
Audio:
 Device-1: AMD driver: snd_hda_intel v: kernel bus-ID: 00:01.1
 API: ALSA v: k6.5.0-10-generic status: kernel-api
 Server-1: PipeWire v: 0.3.84 status: active
Network:
 Device-1: Realtek RTL8822CE 802.11ac PCIe Wireless Network Adapter
 vendor: Hewlett-Packard driver: rtw_8822ce v: N/A port: 1000 bus-ID: 01:00.0
 IF: wlp1s0 state: up mac: <filter>
Bluetooth:
 Device-1: Realtek Bluetooth Radio driver: btusb v: 0.8 type: USB
 bus-ID: 1-1.2:4
 Report: hciconfig ID: hci0 rfk-id: 2 state: up address: <filter> bt-v: 5.1
 lmp-v: 10
Drives:
 Local Storage: total: 29.12 GiB used: 9.01 GiB (30.9%)
 ID-1: /dev/mmcblk1 vendor: Hynix model: hB8aP size: 29.12 GiB
Partition:
 ID-1: / size: 28.2 GiB used: 9 GiB (31.9%) fs: ext4 dev: /dev/mmcblk1p2
 ID-2: /boot/efi size: 299.4 MiB used: 7.7 MiB (2.6%) fs: vfat
 dev: /dev/mmcblk1p1
Swap:
 Alert: No swap data was found.
Sensors:
 System Temperatures: cpu: 29.8 C mobo: N/A gpu: amdgpu temp: 29.0 C
 Fan Speeds (rpm): N/A
Info:
 Processes: 175 Uptime: 6h 35m Memory: total: 4 GiB note: est.
 available: 3.54 GiB used: 881.3 MiB (24.3%) Init: systemd
 target: graphical (5) Compilers: N/A Packages: 1893 Shell: Bash v: 5.2.15
 inxi: 3.3.31

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
STONEY not supported in kfd
https://bugs.launchpad.net/bugs/2043527
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