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

Aaron Ma aaron.ma at canonical.com
Wed Mar 13 14:43:04 UTC 2019

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

Some systems boot failed at a very early stage, only blackscreen shown.

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.
execute all acpi tables to make system work properly.

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

[Regression Potential]
Upstream fix. Low risk.
Backported changes is one line of debug ouput sentence in nsparse.c:
s/Start table execution pass/Start load pass/

Verified on several laptops. Fix boot failure and no regression found.

This patch is from 4.17-rc1, so only Bionic/OEM 4.15 kernels need it.

Schmauss, Erik (1):
  ACPICA: Integrate package handling with module-level code

 drivers/acpi/acpica/dspkginit.c | 128 ++++++++++++++++++--------------
 drivers/acpi/acpica/dswexec.c   |   6 +-
 drivers/acpi/acpica/nsparse.c   |   4 +-
 drivers/acpi/acpica/pstree.c    |   1 +
 include/acpi/acpixf.h           |   8 +-
 5 files changed, 85 insertions(+), 62 deletions(-)


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