I took the *-116 kernel a few days ago on my 16.04.3 desktop, got a
mouse freeze after booting, and went back to *-112.

I see from my dpkg.log that version 5.4.0-6ubuntu1~16.04.9 of gcc
installed over a day before the *-116 kernel.  I see also from
5_5.4.0-6ubuntu1~16.04.9_amd64.deb.html that the .8 version added
support for thunk-extern, which is needed to build the Spectre retpoline
changes.  So at least in my case, the gcc version seemed sufficient to
build DKMS drivers at the time of the *-116 kernel upgrade.

I also am seeing kernel panics from other DKMS drivers on the *-116
kernel, and on other kernels that have merged the Spectre retpoline

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  4.4.0-116 Kernel update on 2/21 breaks Nvidia drivers (on 14.04 and

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