System unattended sleep timeout
There is a hidden setting in the Power Options control panel called System unattended sleep timeout. By default it is set to two minutes and is not visible in the control panel. As far as Je sais, a registry tweak is required to make it visible.
The tweak involves changing the value of the "Attributes" key from 1 to 2 in the following location:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\238C9FA8-0AAD-41ED-83F4-97BE242C8F20\7bc4a2f9-d8fc-4469-b07b-33eb785aaca0]
Changing the value back to 1 re-hides the power option.
After making the above registry tweak ouvrez le Options d'alimentation control panel and there should now be a System unattended sleep timeout setting:
A reboot may be a good idea after.
Vous pouvez read more about it here (and also download a .reg patch file if you want):
http://www.sevenforums.com/tutorials/246364-power-options-add-system-unattended-sleep-timeout.html
Console lock display off timeout
There is also a somewhat related setting Console lock display off timeout which also requires a registry tweak to enable. I did not find this tweak necessary to fix my problem but perhaps you may. The tweak again involves changing the value of the "Attributes" key from 1 to 2, this time in the following location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerSettings\7516b95f-f776-4464-8c53-06167f40cc99\8EC4B3A5-6868-48c2-BE75-4F3044BE88A7
And vous pouvez read more about it here:
http://www.eightforums.com/tutorials/8267-power-options-add-console-lock-display-off-timeout.html