No resume from deep sleep on i7-8550U w/root on zfs on mantic

[Andrea Ieri]

This is an odd one, and I'm unsure what is causing it.
I have a thinkpad T480s with an i7-8550U that used to sleep and resume well in jammy and lunar.
I have now reinstalled mantic from scratch and I am unable to resume from deep sleep.

What works and what doesn't:
* mantic live USB installer + kernel 6.5.0.9 + deep sleep → WORKS
* mantic installation on nvme w/zfs + kernel 6.5.0.10 + deep sleep → does not resume
* mantic installation on nvme w/zfs + kernel 6.5.0.9 + deep sleep → does not resume
* mantic installation on nvme w/zfs + kernel 6.5.0.10 + s2idle sleep → WORKS

In other words the only differentiator seems to be zfs.
I also have a P14s G4 (Ryzen 7840U) running mantic that sleeps without issue, although only s2idle is available in /sys/power/mem_sleep.

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: linux-image-6.5.0-10-generic 6.5.0-10.10
ProcVersionSignature: Ubuntu 6.5.0-10.10-generic 6.5.3
Uname: Linux 6.5.0-10-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CasperMD5CheckResult: unknown
Date: Fri Nov 17 15:32:59 2023
MachineType: {report['dmi.sys.vendor']} {report['dmi.product.name']}
ProcFB: 0 i915drmfb
ProcKernelCmdLine: root=zfs:zroot/ROOT/ubuntu quiet loglevel=4 spl.spl_hostid=0x00bab10c
RelatedPackageVersions:
 linux-restricted-modules-6.5.0-10-generic N/A
 linux-backports-modules-6.5.0-10-generic N/A
 linux-firmware 20230919.git3672ccab-0ubuntu2.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/14/2023
dmi.bios.release: 1.55
dmi.bios.vendor: LENOVO
dmi.bios.version: N22ET78W (1.55 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20L7CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40709 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.23
dmi.modalias: dmi:bvnLENOVO:bvrN22ET78W(1.55):bd08/14/2023:br1.55:efr1.23:svnLENOVO:pn20L7CTO1WW:pvrThinkPadT480s:rvnLENOVO:rn20L7CTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20L7_BU_Think_FM_ThinkPadT480s:
dmi.product.family: ThinkPad T480s
dmi.product.name: 20L7CTO1WW
dmi.product.sku: LENOVO_MT_20L7_BU_Think_FM_ThinkPad T480s
dmi.product.version: ThinkPad T480s
dmi.sys.vendor: LENOVO