For example, if your kernel boot line in grub.cfg were to look like the following:
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linux /kernel-genkernel-x86_64-3.6.0-sabayon ro init=/linuxrc splash=silent,theme:sabayon video=vesafb:ywrap,mtrr:3 vga=791 gfxpayload=1024x768x16 console=tty1 quiet dokeymap keymap=uk domdadm resume=swap:UUID=21d41eeb-fdbb-4722-a766-00f64b857ef6 real_resume=UUID=21d41eeb-fdbb-4722-a766-00f64b857ef6 root=UUID=fd1b4e08-fc28-4a2b-898a-a729887ea756 docrypt
you would make it look like the following:
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linux /kernel-genkernel-x86_64-3.6.0-sabayon ro init=/linuxrc splash=silent,theme:sabayon video=vesafb:ywrap,mtrr:3 vga=791 gfxpayload=1024x768x16 console=tty1 quiet dokeymap keymap=uk domdadm resume=swap:UUID=21d41eeb-fdbb-4722-a766-00f64b857ef6 real_resume=UUID=21d41eeb-fdbb-4722-a766-00f64b857ef6 root=UUID=fd1b4e08-fc28-4a2b-898a-a729887ea756 docrypt acpi=on
It would be sensible for you to make a backup of grub.cfg before you edit it:
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cp /boot/grub/grub.cfg /boot/grub/grub.cfg.bak
If that works, later on you can add the parameter to /etc/default/sabayon-grub so that it gets added automatically if you, or (SL) ever execute the grub2-mkconfig command in future.


