I managed to figure out why, I got an error when my PC came out of suspend (sudo journalctl -k -b -1 output).
nvidia-bug-report.log.gz (1.5 MB)
Please ignore API mismatch: the client has the version 515.48.07, but this kernel module has the version 470.129.06. errors, they are caused by old version of NVidia modules installed by flatpak.
Please check with latest 515.57 driver.
Same thing, although I didn’t find an error in dmesg this time. I can’t even get into tty, the system hangs.
nvidia-bug-report.log.gz (1.5 MB)
июл 23 16:14:20 pc kernel: PM: hibernation: hibernation exit
июл 23 16:14:23 pc kernel: nvidia-modeset: WARNING: GPU:0: Lost display notification (0:0x00000000); continuing.
июл 23 16:14:47 pc kernel: NVRM: GPU at PCI:0000:05:00: GPU-039a34f7-087c-dc8f-a607-e0d937443d0f
июл 23 16:14:47 pc kernel: NVRM: Xid (PCI:0000:05:00): 62, pid='<unknown>', name=<unknown>, 0000(0000) 00000000 00000000