OK, it sounds like this might be a kernel regression. Please try downgrading to kernel 4.10 or earlier:
http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D
and then select it at boot time.
Kernel 4.10 is what Ubuntu 17.04 had where you said it was working.
OK, it sounds like this might be a kernel regression. Please try downgrading to kernel 4.10 or earlier:
http:// kernel. ubuntu. com/~kernel- ppa/mainline/ ?C=N;O= D
and then select it at boot time.
Kernel 4.10 is what Ubuntu 17.04 had where you said it was working.