[Bug 93652] Random crashes/freezing with amdgpu Fury X mesa 11.1

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93652

--- Comment #6 from Sebastian Jensen <s at gonx.dk> ---
I can also confirm this bug in form of a full system freeze on an AMD 380X on
the latest Mesa revision in addition to running the latest drm-next as of 27th
March 2016.

To put it short, setting R600_DEBUG=nodcc seems to alleviate the crashes, based
on a couple of hours of testing.

For some details, I can confirm the crashes in at least Dota 2, Portal,
Counter-Strike: Global Offensive - all native applications - and under WINE,
Starcraft II and Heroes of the Storm both crash within minutes.

On the contrary, the crash never occured in other programs, like Furmark,
Battleblock Theater, as well as Awesomenauts.

I also tried recording multiple apitraces where the issue occured, but none of
the traces would actually reproduce the hang.

However, what strikes me as most odd is that the hang generally never occured
in games in WINE when using the Gallium Nine patches, while the hangs would
occur within minutes otherwise.

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