https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251226
Bug ID: 251226
Summary: ixgbe: resume from real S3 suspend resets the whole
system (Intel X520 NIC)
Product: Base System
Version: CURRENT
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: greg@unrelenting.technology
The ix driver seems to have actual suspend-resume support, which is nice.
However..
With this device ("X520"):
ix0@pci0:44:0:0: class=0x020000 rev=0x01 hdr=0x00 vendor=0x8086
device=0x10fb subvendor=0x8086 subdevice=0x0006
vendor = 'Intel Corporation'
device = '82599ES 10-Gigabit SFI/SFP+ Network Connection'
everything works great under debug.acpi.suspend_bounce=1, but resuming from
*real* S3 sleep results in failure — namely instant system reset, without a
coredump :( How to even debug this?
Mainboard LED blinks, GPU LEDs turn on, NIC LEDs turn on and boom reset,
mainboard LED blinks again indicating reboot, system boots again freshly. If
that matters: the platform is AMD X370 (1st gen Ryzen), the NIC is connected to
the bottom (chipset) PCIe slot. However a Mellanox (mlx4en) NIC in the same
slot does survive suspend-resume cycles, apart from panicking sometimes because
there's no actual support for suspend-resume in mlx4 (bug 251154).
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