Could you try to add the following option to /etc/modprobe.d/options:
options libata noacpi=1
Then run 'update-initramfs -u' and see whether that changes anything? Thanks.
** Changed in: linux (Ubuntu)
Status: In Progress => Incomplete
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System do not function properly after suspend and resume (Weybridge)
https://bugs.launchpad.net/bugs/175828
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