У меня это работало до какого-то из обновлений.
Материнка двухлетней давности от асуса, видео-карточка nvidia 7600 с дровами из репозитория.
Вот вывод:
dima@dima-desktop:~$ sudo /etc/acpi/hibernate.sh
[sudo] password for dima:
ifdown: interface vmnet1 not configured
ifdown: interface vmnet8 not configured
* Shutting down ALSA... [ OK ]
* Saving the system clock
/sbin/s2disk: invalid option -- x
Usage: s2disk [options]
-h, --help this text
-f, --config <config> alternative configuration file.
-r, --resume_device <resume_device> device that contains swap area
-o, --resume_offset <resume_offset> offset of swap file in resume device.
-s, --image_size <image_size> desired size of the image.
Laptop mode disabled, not active.
* Setting the system clock
ifup: interface eth0 already configured
Ignoring unknown interface vmnet1=vmnet1.
Ignoring unknown interface vmnet8=vmnet8.
* Setting up ALSA... [ OK ]
FATAL: Module acpi_sbs not found.
FATAL: Module acpi_sbs not found.