current boot failure on NVME with and after 8e9fe9996a1f

Reply: Kevin Bowling : "Re: current boot failure on NVME with and after 8e9fe9996a1f"
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From: Michael Butler <imb_at_protected-networks.net>
Date: Thu, 13 Aug 2026 19:50:57 UTC
On a Dell Latitude 5540 with two NVME disks, the last working commit 
from bisection is a9752e9ac8a6.

Anything beyond this fails on start up with ..

d5540 kernel: nvme1: Resetting controller due to a timeout.
d5540 kernel: nvme1: event="start"
d5540 kernel: nvme1: event="success"
d5540 kernel: nvme1: aborting outstanding i/o
d5540 kernel: nvme1: done aborting outstanding i/o

It seems that the PCI changes don't work for disks attached in this 
manner ..

imb@d5540:/home/imb> sudo pciconf -l -v
hostb0@pci0:0:0:0:class=0x060000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0xa708 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake-P/U 2p+8e cores Host Bridge/DRAM Controller'
    class      = bridge
    subclass   = HOST-PCI
vgapci0@pci0:0:2:0:class=0x030000 rev=0x04 hdr=0x00 vendor=0x8086 
device=0xa7a1 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake-P [Iris Xe Graphics]'
    class      = display
    subclass   = VGA
none0@pci0:0:4:0:class=0x118000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0xa71d subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake Dynamic Platform and Thermal Framework 
Processor Participant'
    class      = dasp
none1@pci0:0:6:0:class=0x088000 rev=0x00 hdr=0x00 vendor=0x8086 
device=0x09ab subvendor=0x0000 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'RST VMD Managed Controller'
    class      = base peripheral
pcib1@pci0:0:7:0:class=0x060400 rev=0x01 hdr=0x01 vendor=0x8086 
device=0xa76e subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake-P Thunderbolt 4 PCI Express Root Port'
    class      = bridge
    subclass   = PCI-PCI
pcib8@pci0:0:7:1:class=0x060400 rev=0x01 hdr=0x01 vendor=0x8086 
device=0xa73f subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    class      = bridge
    subclass   = PCI-PCI
none2@pci0:0:8:0:class=0x088000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0xa74f subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'GNA Scoring Accelerator module'
    class      = base peripheral
xhci0@pci0:0:13:0:class=0x0c0330 rev=0x01 hdr=0x00 vendor=0x8086 
device=0xa71e subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake-P Thunderbolt 4 USB Controller'
    class      = serial bus
    subclass   = USB
none3@pci0:0:13:2:class=0x0c0340 rev=0x01 hdr=0x00 vendor=0x8086 
device=0xa73e subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake-P Thunderbolt 4 NHI'
    class      = serial bus
    subclass   = USB
pcib9@pci0:0:14:0:class=0x010400 rev=0x00 hdr=0x00 vendor=0x8086 
device=0xa77f subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'RST Volume Management Device Controller'
    class      = mass storage
    subclass   = RAID
none4@pci0:0:18:0:class=0x070000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51fc subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake-P Integrated Sensor Hub'
    class      = simple comms
    subclass   = UART
xhci1@pci0:0:20:0:class=0x0c0330 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51ed subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCH USB 3.2 xHCI Host Controller'
    class      = serial bus
    subclass   = USB
none5@pci0:0:20:2:class=0x050000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51ef subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCH Shared SRAM'
    class      = memory
    subclass   = RAM
iwlwifi0@pci0:0:20:3:class=0x028000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51f1 subvendor=0x8086 subdevice=0x4090
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake PCH CNVi WiFi'
    class      = network
ig4iic0@pci0:0:21:0:class=0x0c8000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51e8 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCH Serial IO I2C Controller'
    class      = serial bus
ig4iic1@pci0:0:21:1:class=0x0c8000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51e9 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCH Serial IO I2C Controller'
    class      = serial bus
none6@pci0:0:22:0:class=0x078000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51e0 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCH HECI Controller'
    class      = simple comms
pcib12@pci0:0:29:0:class=0x060400 rev=0x01 hdr=0x01 vendor=0x8086 
device=0x51b1 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCI Express x1 Root Port'
    class      = bridge
    subclass   = PCI-PCI
isab0@pci0:0:31:0:class=0x060100 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x519d subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake LPC/eSPI Controller'
    class      = bridge
    subclass   = PCI-ISA
hdac0@pci0:0:31:3:class=0x040380 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51ca subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake-P/U/H cAVS'
    class      = multimedia
    subclass   = HDA
ichsmb0@pci0:0:31:4:class=0x0c0500 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51a3 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCH-P SMBus Host Controller'
    class      = serial bus
    subclass   = SMBus
none7@pci0:0:31:5:class=0x0c8000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x51a4 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake-P PCH SPI Controller'
    class      = serial bus
em0@pci0:0:31:6:class=0x020000 rev=0x01 hdr=0x00 vendor=0x8086 
device=0x0dc5 subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Ethernet Connection (23) I219-LM'
    class      = network
    subclass   = ethernet
pcib2@pci0:1:0:0:class=0x060400 rev=0x03 hdr=0x01 vendor=0x8086 
device=0x0b26 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Goshen Ridge 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib3@pci0:2:0:0:class=0x060400 rev=0x03 hdr=0x01 vendor=0x8086 
device=0x0b26 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Goshen Ridge 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib4@pci0:2:1:0:class=0x060400 rev=0x03 hdr=0x01 vendor=0x8086 
device=0x0b26 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Goshen Ridge 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib5@pci0:2:2:0:class=0x060400 rev=0x03 hdr=0x01 vendor=0x8086 
device=0x0b26 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Goshen Ridge 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib6@pci0:2:3:0:class=0x060400 rev=0x03 hdr=0x01 vendor=0x8086 
device=0x0b26 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Goshen Ridge 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib7@pci0:2:4:0:class=0x060400 rev=0x03 hdr=0x01 vendor=0x8086 
device=0x0b26 subvendor=0x8086 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Thunderbolt 4 Bridge [Goshen Ridge 2020]'
    class      = bridge
    subclass   = PCI-PCI
pcib10@pci65526:224:6:0:class=0x060400 rev=0x01 hdr=0x01 vendor=0x8086 
device=0xa74d subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Intel Corporation'
    device     = 'Raptor Lake PCI Express 4.0 Graphics Port'
    class      = bridge
    subclass   = PCI-PCI
none8@pci65526:224:28:0:class=0x088000 rev=0x00 hdr=0x00 vendor=0x8086 
device=0x09ab subvendor=0x0000 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'RST VMD Managed Controller'
    class      = base peripheral
pcib11@pci65526:224:28:4:class=0x060400 rev=0x01 hdr=0x01 vendor=0x8086 
device=0x51bc subvendor=0x0000 subdevice=0x0000
    vendor     = 'Intel Corporation'
    device     = 'Alder Lake PCI Express x4 Root Port'
    class      = bridge
    subclass   = PCI-PCI
nvme0@pci65526:225:0:0:class=0x010802 rev=0x01 hdr=0x00 vendor=0x1344 
device=0x5416 subvendor=0x1344 subdevice=0x1100
    vendor     = 'Micron Technology Inc'
    device     = '2550 NVMe SSD (DRAM-less)'
    class      = mass storage
    subclass   = NVM
nvme1@pci65526:226:0:0:class=0x010802 rev=0x03 hdr=0x00 vendor=0x1344 
device=0x5413 subvendor=0x1344 subdevice=0x2b00
    vendor     = 'Micron Technology Inc'
    device     = '2400 NVMe SSD (DRAM-less)'
    class      = mass storage
    subclass   = NVM
rtsx0@pci0:113:0:0:class=0xff0000 rev=0x01 hdr=0x00 vendor=0x10ec 
device=0x525a subvendor=0x1028 subdevice=0x0c05
    vendor     = 'Realtek Semiconductor Co., Ltd.'
    device     = 'RTS525A PCI Express Card Reader'