Trying the amd64 kernels at
http://kernel.ubuntu.com/~kernel-ppa/mainline/
The last 4.8 kernel (linux-image-4.8.17-040817-generic_4.8.17-040817.201701090438_amd64.deb) boots fine. None of the 4.9 kernels I tried (v4.9.1 and v4.9-rc1) boot.
So it seems that this regression was introduced in 4.9
Trying the amd64 kernels at
http:// kernel. ubuntu. com/~kernel- ppa/mainline/
The last 4.8 kernel (linux- image-4. 8.17-040817- generic_ 4.8.17- 040817. 201701090438_ amd64.deb) boots fine. None of the 4.9 kernels I tried (v4.9.1 and v4.9-rc1) boot.
So it seems that this regression was introduced in 4.9