Whoever fixed this, I love you! Somewhere in the last 4 updates the problem seems to have been resolved. I updated from beta 40x (I forget exact off the top of my head) to beta build 412 today (installed 4 updates in a row to get there) and Portal 2 actually loaded! I was also able to load Awesomenauts. I was getting pretty solid 59.9x fps. I'll actually test playing a game tomorrow on it for the first time now that it's not crashing every time I attempt to load one. Thanks!
Nothing extracted yet.
Easily Reproducable segfault
dmesg:
X dies
It's worth noting I'm NOT using any X-Box 360 controllers. I'm only using Steam
controllers. I have three. Two are attached to SteamBox. Third is attached to
Steam Link. Turning off controllers plugged into SteamBox still results in
segfault.
xorg log file:
My setup
Syber Steam Machine X: http://www.sybergaming.com/products/steam-machine-x.aspx#more-spec
Steam Link
1G wired networking (tested sustained throughput of 4 times theoretical maximum of 100M using socat)
2 Vizio 50" 2015 Smart TVs
3 Steam Controllers
System Info