I bought a new Toshiba Satellite C870-15J with Windows 7 installed.
Made a dual boot with Xubuntu 12.04.
When I shut down Xubuntu, the system seems to turn itself completely off, but after some seconds I hear a click, and the system reboots itself.
The same when I shut down via the terminal with "sudo shutdown -h now".
In the power manager I changed the value for the onn-off button to shut off, but still the same problem.
I also entered the bios and made sure every Wake-on-LAN-like-function is disabled.
In grub I changed GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="acpi=force quiet splash" as suggested in another thread. To no avail...
When I use the "Windows-side" and shut off, it stays off, which is why I think it can't be a hardware problem.
Can anybody help me? It is a new laptop and it's rather annoying it won't work as it should...