I had a similar problem with my ryzen 1700/asrock x370 taichi: Every time I left computer idle, when I came back it was frozen. I didn't try pinging to see if i

I had a similar problem with my ryzen 1700/asrock x370 taichi: Every time I left computer idle, when I came back it was frozen. I didn't try pinging to see if it responded. What solved the problem for me completely was blacklisting the nouveau module for nvidia(about two weeks without a single freeze). In my case it was an option because I use an AMD gpu for linux and a nvidia for passthrough, so I have no need for the nouveau module to be loaded. BTW this is where I got the hint: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690085 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690085 What I got from this is that it is not an nouveau driver bug, but rather a hardware bug that has a greater chance of being triggered if the module is loaded. The same thread suggests that disabling ASLR is also a valid workaround.