Samsung PM991a drive issues

Windows 10 22H2 + Ubuntu 2404.01

Windows is outdated / unsupported; thats ok, I do not have issues with that anyway

Framework Laptop 16

Two related symptoms:
One.
After I added the MZ9LQ512 SSD to the system, Ubuntu 2404 cannot sleep. Or rather, it can, but it cannot wake up (some kind of kernel lock).

I am unable to get any log on Windows, not even a unsuccessful shutdown.
On Linux, I don’t know how to look for any log, not even a “entering sleep/suspend” one.

Windows will wake up, for 2 second, then hang, and hard reserts (cold boot). Disabling LSPM/ASPM in BIOS does fix it for Windows, but not Linux.

Two.
If I put the MZ9LQ512 on the bottom slot (in the dual m.2 carrier), it does not show up (at all). The slot still works, if I just revert the two spots.

Using dual SSD adapter.
SSDs are:
SAMSUNG MZ9LQ512HBLU-00B00 (FXM7601Q) (expansion bay far)
TEAM TM8FP6002T (SN10660) (expansion bay near)
P0327 Phison 512GB (27030101)
TEAM TM8FP6002T (SN10660)

The SAMSUNG is the one that “has issues”. It was in a USB enclosure for the longest time, and the one having the Windows install. The Linux install is on the Phison.

This is with BIOS 3.0.7.

If I put the WD SN530 in place of the Samsung (991a), it immediately show up (ddual SSD carrier, near slot). I might try different slots, like on the main board

So it’s always just this, eh?