[PATCH 0/1] [SRU][B/B-OEM] UBUNTU: SAUCE: Fix ACPI bug that causes boot failure

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1819921

[Impact]
Some lenovo laptops failed to boot at a very early stage, only blackscreen shown.

[Fix]
Some system BIOS set definition in if statement, it would be deferred to
be loaded.
Some devices would not work properly and cause a system lockup.
add a quirk for these laptops to execute all acpi tables and
make system work properly.

[Test]
Tested on several laptops, the laptop that failed to boot boots well.
Other laptops still works fine.

[Regression Potential]
SAUCE patch. Low, specific changes depends on hardware.

Upstream fix:

commit 5a8361f7ecceaed64b4064000d16cb703462be49
Author: Schmauss, Erik <erik.schmauss at intel.com>
Date:   Thu Feb 15 13:09:30 2018 -0800

    ACPICA: Integrate package handling with module-level code

Due to the lots of changes in this commit and other regressions concern
So made a sauce patch in Bionic kernel with the specific BIOS series.
Verified on several laptops. Fix boot failure and no regression found.

The upstream fix is in 4.17-rc1, so only Bionic/OEM 4.15 kernels need it.

Aaron Ma (1):
  UBUNTU: SAUCE: ACPI / bus: Add some Lenovo laptops in list of acpi
    table term list

 drivers/acpi/bus.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

-- 
2.17.1