On Tue, 2023-02-21 at 09:25 +0100, Oleksandr Natalenko wrote: > > > Right, sorry. Here it is: http://ix.io/4oLq $ echo `grep ^00000001 4oLq | cut -c36-37` 00 02 04 06 08 0a 0c 0e 10 12 14 16 18 1a 1c 1e 01 03 05 07 09 0b 0d 0f 11 13 15 17 19 1b 1d 1f Well they look sane enough. All even APIC IDs and then all the odd ones is a topology that isn't massively surprising. Does it match what you get *before* suspend/resume? Obviously we could stick our fingers in our ears and go "la la la" and just disable it for non-X2APIC, for AMD without X2APIC, or perhaps disable it on *resume* but still use it at boot. But I'd really like to understand what's going on and not do voodoo. Thanks for helping!