This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:
apport-collect 1545542
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
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https://bugs.launchpad.net/bugs/1545542
Title:
Enable arm64 emulation of removed ARMv7 instructions
Status in linux package in Ubuntu:
Confirmed
Bug description:
Linux now supports emulation of three deprecated ARMv7 features that
were removed from ARMv8: SWP(B), CP15ISB/DSB/DMB, and SETEND. At least
CP15DMB is used by some armhf archive binaries (notably pandoc), so we
need emulation enabled on the kernels that scalingstack uses.
I haven't checked which version added which, but they appeared some
time between 3.13 and 4.2, and I only care about 4.2 onwards. So
please enable ARMV8_DEPRECATED, SWP_EMULATION, CP15_BARRIER_EMULATION
and SETEND_EMULATION in arm64 kernels for wily onwards.
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