Not sure what to add to this. Running a system with a GeForce GT 1030
GV-N1030SL-2GL. It worked fine when passed through to a Windows VM, but when
attempting to use it as the Linux 4.18.12 GPU, I get this error. I can confirm
that nouveau.runpm=0 has no apparent effect, while nouveau.noaccel=1 eliminates
the error. (startx, of course, fails.)

Running kernel 4.14.74, I'm not sure this error appears. It is as though
nouveau.noaccel=1 is in effect from the beginning. Perhaps the card is "better"
supported with the 4.18 series.