My X13G3 does not have such a setting in EFI setup but the fancy power management setups that come with most (if not all DEs) does not seem to play well with it, it seems to wait for some processes to finish before sleeping even though those processes have already been suspended and will not finish, so it never goes fully to sleep even though the laptop's lid LED says it is suspended. I never investigated this issue since I was just seeing how KDE and XFCE had progressed since my last try of them. Have not had any issues with it using old fashioned suspend setups with just a WM and no DE.

Other things; it really did not play well with the 5.x LTS kernel of slackware 15, poor performance all around but switching to slackware current with its 6.x kernel solved that. KDE also used the GPU which decreased battery life but was still good, certainly better than the Windows that it came with which had abysmal battery life. I think the DEs also played with the CPU governor, at least with KDE, seem to recall that it reved up to full speed long before it needed to but don't quite remember.

Overall, love the X13, especially the 16:10 screen ratio, but I think the G1s had a 16:9?

Edit: With the DEs my X13 also goes into a half awake state when you plug it in when suspended. Generally not an issue but it will stay in that half suspended state until the lid is opened and then reclosed which means if you just unplug it and toss it into your bag, it is still in that half suspended state and will eat the battery. Another thing which I never investigated because I don't use DEs.