Comment 16 for bug 1777586

I also have this issue after upgrading to 18.04.2 LTS with a host with an Adaptec 5805 and linux-image-4.15.0-46-generic.

Machine hangs on boots and starts returning
aacraid: Host Adapter abort request.
aacraid: Outstanding commands on (0,2,223,0):
aacraid: Host Adapter abort request.
aacraid: Outstanding commands on (0,2,224,0):
aacraid: Host Adapter abort request.
aacraid: Outstanding commands on (0,2,225,0):
etc

First I upgraded the FW on the controller to 19204 (from 19176) no improvement

Rolled back to linux-image-4.15.0-45-generic no change.

I tried mainline kernels
linux-image-unsigned-5.0.0-050000-generic_5.0.0-050000.201903032031_amd64.deb
and
linux-image-unsigned-4.20.14-042014-generic_4.20.14-042014.201903051334_amd64.deb
and issue persisted

But if i roll back to 4.4.0-142-generic no problems.