Comment # 117
on bug 80419
from Kamil Páral
(In reply to Marek Olšák from comment #116) > This thread is too long. Could someone please summarize the issues here? > Also, how does the apitrace crash relate to the GPU hang? I hoped somebody clever would respond, but it seems it'll have to be me. OpenGL layman alert. There were multiple issues discovered in this report: 0. (the core issue) radeonsi hangs the system completely (or sometimes recovers) when playing XCOM, randomly (can be minutes, can be hours) 1. Jose claims XCOM has a bug, issuing invalid OpenGL commands (see comment 115). 2. apitrace is crashing while replaying almost any XCOM trace. My trace from comment 74 is affected by this, so you need a temporary fix from https://github.com/apitrace/apitrace/issues/407#issuecomment-166619366 to stop it from crashing. The fix is not mainlined, because Jose says the purpose of apitrace is to help discover problems, not hide them. 3. Another discovered issue was that apitrace was trimming vertex data too aggressively (comment 113, https://github.com/apitrace/apitrace/issues/407#issuecomment-167866502). That is now fixed in apitrace, but my trace is affected, I'd have to re-record it. The problem is that I was really lucky that I recorded it in the first place, my computer did not hang completely as in 99% of cases, but recovered, and therefore the trace was not cut short. I don't think I'd get that lucky again. Plus Nicolai said he does not need that. The trimmed vertex data does not seem to affect the replay in a negative way, but I assume it might complicate the debugging process. 4. When looping over my trace, I can reproduce the crash pretty quick (i.e. my computer completely hangs), but not deterministically (does not happen on every replay). But it seems there is no further info I could supply from my side to help you debug this. 5. Nicolai said he can reproduce it (probably by running the game, not replaying my trace), but it takes a long time, so he wasn't able to work on this too much.
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