ACPI module-level code (MLC) not working?

[Peter Wu <peter@lekensteyn.nl>]

Hi Lv,

According to some tests, setting acpi_gbl_parse_table_as_term_list to
TRUE does is not effective. The code within the If-block is still not
executed early enough or something else is wrong.

Previously Rick had an issue with an Acer Aspire V7-582PG where the dGPU
could not be powered off and I demonstrated an isolated test case in
http://www.spinics.net/lists/linux-acpi/msg70069.html

In Bartosz's case, the dGPU cannot be powered on (also using nouveau),
preventing suspend from working. Situation is as follows (tested with
Linux 3.16, 4.8.4, 4.9-rc2, 4.9-rc4):

His Lenovo IdeaPad Z510 laptop (BIOS date 2014) enables power resources
and related _PR3 objects under the conditional If(_OSI("Windows 2013")).
Both with and without acpi_gbl_parse_table_as_term_list set to TRUE, the
module-level code is not loaded properly. Via a SSDT override, it was
confirmed that removing the If conditional results in the expected
behavior.

Various details are given in https://github.com/Bumblebee-Project/bbswitch/issues/142
including lots of dmesg logs (see posts at the bottom).
With above MLC flag set (v4.9-rc4): https://pastebin.com/raw/vCEPGezX
With SSDT override (v4.9-rc2): https://pastebin.com/raw/3Fsf2VPU

If you would like a new bugzilla entry or have some patches to test, you
know where to find us :)
-- 
Kind regards,
Peter Wu
https://lekensteyn.nl