Hi folks, setup: kernel 5.18.14 (built from git) Qnap TS-559 Pro II, 4*3.5 HDD + 1 SSD, /boot is on USB stick Intel(R) Atom(TM) CPU D525 Debian Sid On a reboot after some runtime my Qnap TS-559 Pro II shuts down cleanly, but after the kernel and initrd are loaded again it writes an endless stream of messages to the console pcieport 0000:00:1c:0: pciehp: Slot(0): Card present pcieport 0000:00:1c:0: pciehp: Slot(0): No link pcieport 0000:00:1c:0: pciehp: Slot(0): Card present pcieport 0000:00:1c:0: pciehp: Slot(0): No link pcieport 0000:00:1c:0: pciehp: Slot(0): Card present pcieport 0000:00:1c:0: pciehp: Slot(0): No link pcieport 0000:00:1c:0: pciehp: Slot(0): Card present pcieport 0000:00:1c:0: pciehp: Slot(0): No link pcieport 0000:00:1c:0: pciehp: Slot(0): Card present pcieport 0000:00:1c:0: pciehp: Slot(0): No link pcieport 0000:00:1c:0: pciehp: Slot(0): Card present pcieport 0000:00:1c:0: pciehp: Slot(0): No link Appr. 2 lines per second. I get an emergency console to login, but it is garbled. If I wait a few minutes to let the qnap cool down it boots again. # lspci 00:00.0 Host bridge: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx DMI Bridge (rev 02) 00:02.0 VGA compatible controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller (rev 02) 00:02.1 Display controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller (rev 02) 00:1a.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 (rev 02) 00:1a.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 (rev 02) 00:1a.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 (rev 02) 00:1a.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 (rev 02) 00:1c.0 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 (rev 02) 00:1c.1 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 (rev 02) 00:1c.2 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 (rev 02) 00:1c.3 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 (rev 02) 00:1c.4 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 5 (rev 02) 00:1c.5 PCI bridge: Intel Corporation 82801I (ICH9 Family) PCI Express Port 6 (rev 02) 00:1d.0 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 (rev 02) 00:1d.1 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 (rev 02) 00:1d.2 USB controller: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 (rev 02) 00:1d.7 USB controller: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 92) 00:1f.0 ISA bridge: Intel Corporation 82801IR (ICH9R) LPC Interface Controller (rev 02) 00:1f.2 SATA controller: Intel Corporation 82801IR/IO/IH (ICH9R/DO/DH) 6 port SATA Controller [AHCI mode] (rev 02) 00:1f.3 SMBus: Intel Corporation 82801I (ICH9 Family) SMBus Controller (rev 02) 01:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9125 PCIe SATA 6.0 Gb/s controller (rev 11) 02:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9125 PCIe SATA 6.0 Gb/s controller (rev 11) 03:00.0 SATA controller: Marvell Technology Group Ltd. 88SE9125 PCIe SATA 6.0 Gb/s controller (rev 11) 04:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection 05:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection 06:00.0 USB controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 03) # lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Address sizes: 36 bits physical, 48 bits virtual Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Vendor ID: GenuineIntel BIOS Vendor ID: Intel Model name: Intel(R) Atom(TM) CPU D525 @ 1.80GHz BIOS Model name: Intel(R) Atom(TM) CPU D525 @ 1.80GHz To Be Filled By O.E.M. CPU @ 1.8GHz BIOS CPU family: 43 CPU family: 6 Model: 28 Thread(s) per core: 2 Core(s) per socket: 2 Socket(s): 1 Stepping: 10 BogoMIPS: 3591.07 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm const ant_tsc arch_perfmon pebs bts nopl cpuid aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dtherm Caches (sum of all): L1d: 48 KiB (2 instances) L1i: 64 KiB (2 instances) L2: 1 MiB (2 instances) NUMA: NUMA node(s): 1 NUMA node0 CPU(s): 0-3 Vulnerabilities: Itlb multihit: Not affected L1tf: Not affected Mds: Not affected Meltdown: Not affected Mmio stale data: Not affected Retbleed: Not affected Spec store bypass: Not affected Spectre v1: Not affected Spectre v2: Not affected Srbds: Not affected Tsx async abort: Not affected Every helpful hint is highly appreciated. Harri