Impact: A 4.18-based hwe kernel has been introduced into bionic. However some of the firmware files it requires are missing from bionic's linux-firmware, rendering the relevant hardware inoperable.
Fix: Add the missing firmware files.
Regression Potential: Most of these files will not be used by the existing kernels in xenial. A few may be, and while regressions are not expected it's possible that new firmware versions might introduce regressions.
SRU Justification
Impact: A 4.18-based hwe kernel has been introduced into bionic. However some of the firmware files it requires are missing from bionic's linux-firmware, rendering the relevant hardware inoperable.
Fix: Add the missing firmware files.
Regression Potential: Most of these files will not be used by the existing kernels in xenial. A few may be, and while regressions are not expected it's possible that new firmware versions might introduce regressions.