This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1965160
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Changed in: linux (Ubuntu Xenial)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1965160
Title:
linux: Fix failure in ubuntu_boot:log_check test
Status in linux package in Ubuntu:
Incomplete
Status in linux source package in Xenial:
Incomplete
Bug description:
SRU Justification
[Impact]
On systems with a broken BIOS that fail to program the APICID_TAG_MAP for DCA,
the dmaengine will print a warning, with stack trace, to the kernel log,
which just adds extra noise to the log and impacts testing on some platforms,
mostly on the older side that will most likely not receive an update to their
BIOS.
[Fix]
A patch from upstream linux changes the call of WARN_TAINT_ONCE() to
pr_warn_once()
and add_taint(). pr_warn_once() will not invoke a warning in the kernel and
instead
just print the associated message.
[Test Case]
The ubuntu_boot log_check test on an affected node, such as
fili:amd64.
[Where problems could occur]
Chance of regression is very low to minimal with this change.
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