Intel I226-V (M.2 A+E) disappears on kernel 7.0.14-4, works on 6.17.2-1 (Lenovo M710q Tiny)

[kamukamo19]

Hi everyone,

I'm encountering what appears to be a kernel regression affecting an Intel I226-V NIC (m.2 A+E Card) installed in a Lenovo ThinkCentre M710q Tiny.

Hardware
Proxmox VE 9 (pve-no-subscription repository)
Lenovo ThinkCentre M710q Tiny
BIOS: M1AKT5A0 (03/10/2025)
Intel I226-V (M.2 A+E Key adapter)
Management interface connected at 2.5 Gbps

Working kernel
6.17.2-1-pve

Everything works correctly.

uname -r
6.17.2-1-pve

ethtool -i nic0

driver: igc
version: 6.17.2-1-pve
firmware-version: 2017:888d
bus-info: 0000:02:00.0

ethtool nic0

Speed: 2500Mb/s
Duplex: Full
Link detected: yes

The NIC is visible in lspci:

02:00.0 Ethernet controller: Intel Corporation Ethernet Controller I226-V (rev 04)

Problematic kernel
7.0.14-4-pve

After booting this kernel:

Kernel oops occurs in igc_watchdog_task
Local console login hangs after authentication
The I226-V disappears completely
lspci only shows the onboard Intel I219-LM
lsmod | grep igc returns nothing

The kernel command line currently includes:

pcie_aspm.policy=performance pcie_port_pm=off

Those parameters did not change the behavior.

Additional observation

If I boot 7.0.14-4, the I226-V remains missing even after warm rebooting back into 6.17.2-1.

Only after:

Shutting the system completely down
Removing AC power
Waiting a few seconds
Reconnecting power

does the I226-V reappear when booting 6.17.2-1.

This makes me think the newer kernel leaves the device in a bad state that survives warm reboot.

Things already tested
Different Ethernet cable
Verified switch and link
Added:
pcie_aspm.policy=performance
pcie_port_pm=off
Confirmed ASPM is already reported as disabled by lspci -vv
Cold boot vs warm reboot comparison
The adapter consistently works on 6.17.2-1

Questions
Has anyone seen a similar regression with Intel I226-V on the 7.0.x kernels?
Is this a known igc regression?
Are there any additional kernel parameters or debugging steps I should try before filing a bug report?

Thanks in advance.

 

[Impact]

Please share this when the NIC is missing

lspci -vnnk | awk '/Ethernet/{print $0}' RS=
journalctl -g "igc|02:00"
journalctl -krp warning

 

[kamukamo19]

it is just repeating the uncorrectable error

 

[ggoller]

Try adding some kernel parameters -- disabling aspm and disabling the pcie power power management, these sometimes fix pcie errors on intel nics:
pcie_aspm=off pcie_port_pm=off

 

[kamukamo19]

Try adding some kernel parameters -- disabling aspm and disabling the pcie power power management, these sometimes fix pcie errors on intel nics:
pcie_aspm=off pcie_port_pm=off

already tried this and some other workaround to no avail. im currently staying at 6.17.2-1.