** Also affects: fwts/xenial
Importance: Undecided
Status: New
** Description changed:
- == SRU justfication, BIONIC ==
+ == SRU justfication, BIONIC (and XENIAL too) ==
+
+ [ update - doing the SRU for XENIAL too, Fri, 10th Aug 2018 ]
While performing Hibernate stress tests on a device with 18.04 server
installed, we got some failures with FWTS and reported them in
lp:1769809.
Even though some of these original failures are due to a bug in
Checkbox, some others are due to the fact that the Bionic kernel 4.15
has a parameter "pm_debug_messages" that needs to be enabled.
-
- If you run the stress tests on this device, you will end up with 4 PASS and 2
FAIL. But if you run this command before running the stress tests:
+ If you run the stress tests on this device, you will end up with 4 PASS
+ and 2 FAIL. But if you run this command before running the stress tests:
$ echo 1 | sudo tee -a /sys/power/pm_debug_messages
then all tests are marked as PASSED.
(see comment #9 in the bug above for more information)
It looks like this is something that should be taked into account by
FWTS. (but I might be wrong!)
Thanks!
== Fix ==
Upstream commits:
lib: fwts_set: fix API for fwts_set, add fwts_set_int
lib: add small helpers top get/set
acpi: s3: force enable /sys/power/pm_debug_messages (LP: #1772563)
acpi: s4: also check for file based swap files
acpi: s4: force enable /sys/power/pm_debug_messages (LP: #1772563)
acpi: s3power: force enable /sys/power/pm_debug_messages (LP: #1772563)
== Regression Potential ==
Minimal, this fix enables a setting in /sys/power/pm_debug_messages and
then returns it back to the initial saved value. At most this could
leave debug on if fwts aborts during the test, but this will not affect
the behavior of a running system.
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https://bugs.launchpad.net/bugs/1772563
Title:
False alarms raised in bionic because 4.15 kernel needs
"pm_debug_messages" to be enabled
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