Looks like disabling the camera fixes the hangs. The culprit should be the small camera overlay that is attached to the controller.
Sorry it looks like it was just accidentally working when I tried several times.
I get GPU hangs even with the camera support completely disabled.
I'm relatively sure that this does not happen with up to date drivers anymore.
Seems to be rare now, but I just got another one:
Apr 17 21:56:09 c-pc kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, signaled seq=9420039, emitted seq=9420041
Apr 17 21:56:09 c-pc kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR* Process information: process vrdashboard pid 7059 thread vrdashboar:cs0 pid 7130
I have not seen this in a long time.
Nothing extracted yet.
This has been an issue for a few weeks so I don't have precise version info. As soon as I open the dashboard, a GPU hang happens and I have to reboot.
It happens on mesa git 96063100812d1de46f4146fde92975c98e78c3ce + llvm 8 git 0d758b2e709. but it does not happen on mesa 18.3.1 with the same llvm 8 build.
In the end I maybe have to bisect mesa.
On mesa 18.3.1 where I don't have the GPU hang, I have another issue, but it's happening maybe 1/5 of the time I start steamvr and it's seemingly random:
Not sure if it's related.