Comment 18 for bug 1729736

this is because lspci reads the config file, which then triggers a full GPU wake up, which is a silly thing to do in the first place.

What we need is something like this in the kernel: https://github.com/karolherbst/linux/commit/cb918e4c926990dfcfce92e1ecd905e0896de605 and then make use of those in userspace, so that we don't need to read config every time anymore.