I had similar issue with kernel 4.8.0-42. No Network connectivity after boot, even screen resolution was stuck in 4:3.
Had to go back on 4.8.0-41 and run 'sudo apt-get install linux-generic' that fixed everything Seems like the previous kernel upgrade failed. So, I scan the apt log to find some kernel upgrade errors: Selecting previously unselected package linux-image-4.8.0-42-generic. Preparing to unpack .../13-linux-image-4.8.0-42-generic_4.8.0-42.45_amd64.deb ... Examining /etc/kernel/preinst.d/ run-parts: executing /etc/kernel/preinst.d/intel-microcode 4.8.0-42-generic /boot/vmlinuz-4.8.0-42-generic Done. Unpacking linux-image-4.8.0-42-generic (4.8.0-42.45) ... Selecting previously unselected package linux-signed-image-4.8.0-42-generic. Preparing to unpack .../14-linux-signed-image-4.8.0-42-generic_4.8.0-42.45_amd64.deb ... Unpacking linux-signed-image-4.8.0-42-generic (4.8.0-42.45) ... Setting up linux-image-4.8.0-42-generic (4.8.0-42.45) ... Running depmod. update-initramfs: deferring update (hook will be called later) Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.8.0-42-generic /boot/vmlinuz-4.8.0-42-generic run-parts: executing /etc/kernel/postinst.d/dkms 4.8.0-42-generic /boot/vmlinuz-4.8.0-42-generic Error! Your kernel headers for kernel 4.8.0-42-generic cannot be found. Please install the linux-headers-4.8.0-42-generic package, or use the --kernelsourcedir option to tell DKMS where it's located Error! Your kernel headers for kernel 4.8.0-42-generic cannot be found. Please install the linux-headers-4.8.0-42-generic package, or use the --kernelsourcedir option to tell DKMS where it's located Error! Your kernel headers for kernel 4.8.0-42-generic cannot be found. Please install the linux-headers-4.8.0-42-generic package, or use the --kernelsourcedir option to tell DKMS where it's located Error! Your kernel headers for kernel 4.8.0-42-generic cannot be found. Please install the linux-headers-4.8.0-42-generic package, or use the --kernelsourcedir option to tell DKMS where it's located Not sure why this upgrade failed exactly, but running 'sudo apt-get install linux-generic' command seemed to allowed the previous upgrade to complete manually and fix eveything. Thank you for reporting Jerry, your report helped me quickly fix my system. Maybe this can help find the cause of the kernel issue your having. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1667968 Title: Ubuntu 16.10 kernel 4.8.0-39 No network connectivity To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1667968/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
