Comment 11 for bug 1364748

The BIOS updates are available @ http://support.lenovo.com/en/downloads/ds037576.
The system is currently running on 1.09 which is oldest one, and 2.18 added a hybrid graphic fix (see below and http://download.lenovo.com/ibmdl/pub/pc/pccbbs/mobiles/gluj15uc.txt), but again I do not have the required battery pack for updating the BIOS.

<2.18>
 UEFI: 2.18 / ECP: 1.08
- (New) Added support for Hybrid Graphics on Windows 8.1 for NVIDIA graphics
        models.
        Note:
        To support this, uninstall and re-install the NVIDIA graphics driver
        after updating the UEFI BIOS from the version 1.18 or lower.

If someone in community can help comment or upload acpidump file, I can do more analysis. If that's not the case, I would suggest to "won't fix" this bug as it seems not affect any function.