Created attachment 144687 [details]
Journalctl, from starting Steam to Magic Sysrq shutdown

I can also confirm this issue, with the same error message in the log.
I can reproduce the issue every single time by trying to start a new game in
"Cities: Skylines".

System information:

```
AMD Ryzen 5 2400G

Linux ZenBox 5.1.15-arch1-1-ARCH #1 SMP PREEMPT Tue Jun 25 04:49:39 UTC 2019
x86_64 GNU/Linux

mesa-19.1.1-1
```