[Bug 95063] [SKL] random system hang with RC6 enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95063

--- Comment #1 from Gary Wang <gary.c.wang at intel.com> ---
This is Dell's switchable GPU sku (Intel Gen/Nvidia) in SKL platform with
Ubuntu 14.04.4/kernel 3.19+SKL_gfx-driver

It appears following test result for i915 Gfx driver suspend/resume (by echo
'mem' into power state) test,
1. Non-X, kernel with i915 module loaded (more than 5000+ test cycles without
error)
2. xinit simple environment (more than 23000+ test cycles).

Its mesa is mesa-10.1.3. When I run glmark2 based on the second environment, it
got system halt with blank screen within 1 hour. After upgrading to mesa-11.3.0
(5/4/2016), it's working correctly more than 5 hours until now.

Could you help to verify this issue by the latest mesa code and share the test
result with us? Thanks!

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