Hi there, I’m experiencing the same issue on my SER9 AMD Ryzen “AI” HX 370 w/ Radeon 890M under BIOS version SER9T204. I am willing to try a new BIOS to fix the issue. Is a new BIOS available for my particular unit?
Details below.

Symptoms summary
When booted into Linux, pressing the power button briefly (< 0.5 s) has no effect whatsoever. I would expect it to shut the machine down in a default configuration.
When booted into Linux, issuing systemctl suspend does not suspend the device. Instead, the fan starts running at 100% permanently, the suspend attempt fails, and ethernet[1] is disconnected until the next reboot. The system becomes unworkable as a network device, but can still be accessed from the console and shut down manually with shutdown.
[1]: and WiFi too apparently, but I’m not testing that yet. The log lines show that something bad is happening to both r8169 and iwlwifi involving power states at suspend time.
Log messsages
[ 0.205400] acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
[ 0.205400] PCI: ECAM [mem 0xe0000000-0xefffffff] (base 0xe0000000) for domain 0000 [bus 00-ff]
[ 0.205400] PCI: Using configuration type 1 for base access
[ 0.205400] kprobes: kprobe jump-optimization is enabled. All kprobes are optimized if possible.
[ 0.205400] HugeTLB: registered 1.00 GiB page size, pre-allocated 0 pages
[ 0.205400] HugeTLB: 16380 KiB vmemmap can be freed for a 1.00 GiB page
[ 0.205400] HugeTLB: registered 2.00 MiB page size, pre-allocated 0 pages
[ 0.205400] HugeTLB: 28 KiB vmemmap can be freed for a 2.00 MiB page
[ 0.205400] ACPI: Added _OSI(Module Device)
[ 0.205400] ACPI: Added _OSI(Processor Device)
[ 0.205400] ACPI: Added _OSI(Processor Aggregator Device)
*[ 0.208184] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.SBRG.EC0], AE_NOT_FOUND (20240827/dswload2-162)
[ 0.208192] ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20240827/psobject-220)
[ 0.208194] ACPI: Skipping parse of AML opcode: OpcodeName unavailable (0x0010)
[ 0.208831] ACPI: 31 ACPI AML tables successfully acquired and loaded
[ 0.214895] ACPI: USB4 _OSC: OS supports USB3+ DisplayPort+ PCIe+ XDomain+
[ 0.214895] ACPI: USB4 _OSC: OS controls USB3+ DisplayPort+ PCIe+ XDomain+
[ 0.214895] ACPI: Interpreter enabled
[ 0.214895] ACPI: PM: (supports S0 S4 S5)
[ 0.214895] ACPI: Using IOAPIC for interrupt routing
[ 0.216210] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[ 0.216211] PCI: Ignoring E820 reservations for host bridge windows
[ 0.216332] ACPI: Enabled 3 GPEs in block 00 to 1F
[ 0.217156] ACPI: \_SB_.PCI0.GPP0.PWRS: New power resource
[ 0.217475] ACPI: \_SB_.PCI0.GPP0.SWUS.PWRS: New power resource
[ 0.217790] ACPI: \_SB_.PCI0.GPP1.PWRS: New power resource
[ 0.218090] ACPI: \_SB_.PCI0.GPP1.SWUS.PWRS: New power resource
[ 0.218183] ACPI: \_SB_.PCI0.GPP3.P0NV: New power resource
[ 0.218382] ACPI: \_SB_.PCI0.GPP4.PWSR: New power resource
[ 0.218654] ACPI: \_SB_.PCI0.GPP5.PWSR: New power resource
[ 0.218861] ACPI: \_SB_.PCI0.GPP6.PWSR: New power resource
[ 0.219047] ACPI: \_SB_.PCI0.GPP7.P0WW: New power resource
[ 0.219237] ACPI: \_SB_.PCI0.GPPA.PWRS: New power resource
[ 0.219309] ACPI: \_SB_.PCI0.GPPA.VGA_.PWRS: New power resource
[ 0.219410] ACPI: \_SB_.PCI0.GPPA.ACP_.PWRS: New power resource
[ 0.219562] ACPI: \_SB_.PCI0.GPPA.AZAL.PWRS: New power resource
[ 0.219661] ACPI: \_SB_.PCI0.GPPA.HDAU.PWRS: New power resource
[ 0.219776] ACPI: \_SB_.PCI0.GPPA.XHC1.PWRS: New power resource
[ 0.220103] ACPI: \_SB_.PCI0.GPPC.XHC0.PWRS: New power resource
[ 0.220661] ACPI: \_SB_.PCI0.GPPC.XHC3.PWRS: New power resource
[ 0.220963] ACPI: \_SB_.PCI0.GPPC.XHC4.PWRS: New power resource
[ 0.221267] ACPI: \_SB_.PCI0.GPPC.NHI0.PWRS: New power resource
[ 0.221450] ACPI: \_SB_.PCI0.GPPC.NHI1.PWRS: New power resource
[ 0.223406] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[ 0.223410] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI HPX-Type3]
[ 0.223443] acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug SHPCHotplug PME AER PCIeCapability LTR]
Lines prefixed with a * are the telltale “(bug)” lines.
[ 94.808222] PM: suspend entry (s2idle)
[ 94.810913] Filesystems sync: 0.002 seconds
[ 94.813020] Freezing user space processes
[ 94.814113] Freezing user space processes completed (elapsed 0.001 seconds)
[ 94.814116] OOM killer disabled.
[ 94.814116] Freezing remaining freezable tasks
[ 94.815171] Freezing remaining freezable tasks completed (elapsed 0.001 seconds)
[ 94.815173] printk: Suspending console(s) (use no_console_suspend to debug)
[ 94.817869] r8169 0000:c2:00.0 enp194s0: Link is Down
*[ 95.743320] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.SBRG.ECOK], AE_NOT_FOUND (20240827/psargs-332)
[ 95.743341] ACPI Error: Aborting method \_SB.PCI0.GPP7.WOFF due to previous error (AE_NOT_FOUND) (20240827/psparse-529)
[ 95.743394] ACPI Error: Aborting method \_SB.PCI0.GPP7.P0WW._OFF due to previous error (AE_NOT_FOUND) (20240827/psparse-529)
*[ 95.743494] ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.SBRG.EC0.GPO3], AE_NOT_FOUND (20240827/psargs-332)
[ 95.743508] ACPI Error: Aborting method \_SB.PCI0.GPP5.P_OF due to previous error (AE_NOT_FOUND) (20240827/psparse-529)
[ 95.743514] ACPI Error: Aborting method \_SB.PCI0.GPP5.PWSR._OFF due to previous error (AE_NOT_FOUND) (20240827/psparse-529)
[ 97.711243] pcieport 0000:00:02.5: Data Link Layer Link Active not set in 100 msec
[ 97.711360] iwlwifi 0000:c3:00.0: Unable to change power state from D3cold to D0, device inaccessible
[ 97.718823] pcieport 0000:00:02.3: Data Link Layer Link Active not set in 100 msec
[ 97.718885] r8169 0000:c2:00.0: Unable to change power state from D3cold to D0, device inaccessible
[ 97.780222] r8169 0000:c2:00.0 enp194s0: rtl_ocp_gphy_cond == 1 (loop: 10, delay: 25).
[ 97.785309] [drm] PCIE GART of 512M enabled (table at 0x00000080FFB00000).
[ 97.785434] amdgpu 0000:c4:00.0: amdgpu: SMU is resuming...
[ 97.790592] amdgpu 0000:c4:00.0: amdgpu: SMU is resumed successfully!
Lines prefixed with a * are the telltale “(bug)” lines.