Finally it works!
The bootsplash stops people from asking
should your laptop do that? I've got the same and that one doesn't do that
I added the CONFIG_HOTPLUG_CPU (aka SUSPEND_SMP) option.
I also compiled in all the acpi modules.
Now I'm using klaptop_acpi_helper to take care of the suspend.
BTW to work in kde, klaptop_acpi_helper needs chmod +s .
The dialog to do that in KDE complains about klaptop_acpi_helper not having the same size and checksum as it had when it was compiled. It also did that under 11.0