[Bug 84082] [IVB/HSW Bisected ppgtt]Show Black screen during running OglMultithread

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84082

--- Comment #8 from lili <lilix.cheng at intel.com> ---
(In reply to Chris Wilson from comment #7)
> I've run this on a couple of ivb full-ppgtt machines and seen a slowly
> updating window. Do you have any more specifics on how to reproduce?


When running case OglMultithread, the issue happened.
after about 2~3s, there will be black screen, then the program will exit. it
can be reproduced 100%.

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