Comment 6 for bug 1843144

I "applied" the patch by commenting out the line in /usr/src/nvidia-430.50/nvida/nv.c that is referred to in the link AceLan posted, then I used apt-get install --reinstall on the nvidia-dkms package to see if that would make the system compile and install the edited source files.

After that it seems the power drain issue is fixed.