Public bug reported:
Truly grateful for whoever can help
The system experiences intermittent, unrecoverable full system freezes under
amdgpu on a Lenovo ThinkPad T16 Gen 4 with AMD Ryzen AI 7 PRO 350 (Strix Point)
and Radeon 860M (DCN 3.5). The freeze is not reproducible even under sustained
heavy load it occurs unpredictably during light to moderate use (browsing,
video playback). A hard power button reset is required each time. The keyboard
becomes unresponsive during the freeze; the mouse cursor remains partially
active before also freezing or resetting.
Initial investigation confirmed MES ring buffer overflow as the primary cause.
Disabling MES (amdgpu.mes=0) resolved the MES errors but the freeze persists,
now pointing to a separate DCN 3.5 / display scheduler or power state
transition bug. Runtime PM is reported as unavailable for this GPU.
Device Lenovo ThinkPad T16 Gen 4
CPU AMD Ryzen AI 7 PRO 350 (Strix Point)
GPU AMD Radeon 860M (DCN 3.5, RDNA 3.5)
RAM 32 GB + 8 GB swap
OS Zorin OS 18.1 Core
Kernel 6.17.0-1017-oem
Desktop Environment GNOME 46.0 on X11
Session Type X11 (not Wayland)
Display Setup Laptop screen (eDP) + 2x 2560x1440 via DisplayPort MST through
USB dock
Dock Connection USB-C dock - Realtek RTL8153 Ethernet, Genesys Logic USB hubs,
MST display chain
Current Kernel Params amdgpu.mes=0 amdgpu.sg_display=0
DMUB Firmware Version 0x09002C01
VCN Firmware ENC: 1.24 DEC: 9 VEP: 0 Revision: 13
amdgpu DRM Version 3.64.0
• Full system freeze - no input response from keyboard or mouse
• Mouse cursor occasionally remains active briefly before freezing or
resetting
• Keyboard completely unresponsive - Ctrl+Alt+F2 (TTY) and Magic SysRq do
not work
• Freeze is intermittent - NOT reproducible under sustained heavy GPU load
• Occurs during light/moderate use: web browsing, video playback, switching
tabs
• System was stable for 1-2 hours before freezing - pattern suggests power
state transition trigger
• Hard power button reset required every time
• No automatic GPU recovery occurs despite lockup timeout parameters being
set
• amdgpu Runtime PM reported as unavailable on this hardware
amdgpu.mes=0 Resolved MES ring buffer overflow. No MES errors on subsequent
boots. Freeze persists.
amdgpu.sg_display=0 Added as precaution for scatter-gather display issues
on Strix Point. No observable effect on freeze.
amdgpu.gpu_recovery=1 Set previously. GPU reset does not trigger — system
hard freezes before watchdog fires.
amdgpu.lockup_timeout=1000 Set previously. Timeout does not recover system.
Brave hardware accel Disabled in browser settings (brave://settings/system).
Did not prevent freeze.
X11 instead of Wayland Already on X11. Wayland ruled out as cause.
power_dpm_force_performance_level pp_power_profile_mode not available
(likely due to mes=0). DPM tuning limited.
linux-firmware Confirmed up to date. Firmware loads cleanly with no errors.
Screen 0: current 5120 x 1440
eDP-1: connected — 1920x1200 (laptop internal, currently inactive)
DisplayPort-7: connected — 2560x1440+2560+0 @ 59.95Hz (via MST dock)
DisplayPort-8: connected primary — 2560x1440+0+0 @ 59.95Hz (via MST dock)
Note: The two external displays are driven through an MST chain over
DisplayPort via a USB-C dock. The laptop internal display (eDP-1) appears
connected in xrandr but is not active (lid closed during docked use).
CPU (k10temp Tctl) +50.4°C
GPU edge (amdgpu) +48.0°C
GPU PPT 7.02 W
NVMe Composite +39.9°C
Fan 1 / Fan 2 0 RPM (auto mode - normal at this temp)
ACPI CPU +50.0°C
** Affects: linux-oem-6.11 (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "amdgpu_full_report.txt"
https://bugs.launchpad.net/bugs/2148266/+attachment/5961039/+files/amdgpu_full_report.txt
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https://bugs.launchpad.net/bugs/2148266
Title:
amdgpu System Freeze
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