Laptop does not suspend

[brahma]

your pc supports only s2idle unfortunately…
you can set it to deep, but it will probably not work:

Freezing after resuming from Sleep

you are on s2idle, even though you have available deep sleep, and that could be the reason for your issue… so change it to deep: kate /etc/default/grub and inside this line: GRUB_CMDLINE_LINUX_DEFAULT inside the quotes add this parameter: mem_sleep_default=deep dont remove anything, just add it to existing parameters; save the file, update grub: sudo update-grub reboot and test