Created attachment 862983 [details]
Journalctl detail

I had two locks whith game PysolFC: the system was totally blocked and I needed
to do a manual reboot.It was when running not loading the game.
In journalctl I found for both locks a general protection fault in kernel

First
Nov 18 21:43:15 hpprol2 kernel: general protection fault, probably for
non-canonical address 0xc17a6cdf29654b1: 0000 [#1] PREEMPT SMP NOPTI
Nov 18 21:43:15 hpprol2 kernel: CPU: 5 PID: 2154 Comm: Xorg.bin Not tainted
6.0.8-1-default #1 openSUSE Tumbleweed 9d20364b934f5aab0a9bdf84e8f45cfdfae39dab
Nov 18 21:43:15 hpprol2 kernel: Hardware name: HP ProLiant ML350p Gen8, BIOS
P72 11/14/2013
Nov 18 21:43:15 hpprol2 kernel: RIP: e030:kmem_cache_alloc_trace+0xe3/0x350
... and much more  (see attachment)

Second
Nov 19 07:56:58 hpprol2 kernel: general protection fault, probably for
non-canonical address 0x305b115c524982e: 0000 [#1] PREEMPT SMP NOPTI
Nov 19 07:56:58 hpprol2 kernel: CPU: 3 PID: 2169 Comm: Xorg.bin Not tainted
6.0.8-1-default #1 openSUSE Tumbleweed 9d20364b934f5aab0a9bdf84e8f45cfdfae39dab
Nov 19 07:56:58 hpprol2 kernel: Hardware name: HP ProLiant ML350p Gen8, BIOS
P72 11/14/2013
Nov 19 07:56:58 hpprol2 kernel: RIP: e030:kmem_cache_alloc_trace+0xe3/0x350
 No more details for the second lock

I use the xen kernel but no VM were running at lock time.
Maybe related to Xorg or nouveau?