[Bug 94433] GPU HANG: ecode 7:0:0x85fffffc, in kscreenlocker_g [14201], reason: Ring hung, action: reset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94433

--- Comment #1 from Martin <bugs at mrvanes.com> ---
My problems are solved by reverting the change that made IvyBridge fall back to
BCS flips in intel_display.c causing it to use RCS instead again.

--- intel_display.org   2016-03-10 21:26:35.257802164 +0100
+++ intel_display.c     2016-03-10 08:38:30.039530733 +0100
@@ -11498,8 +11498,8 @@
                if (obj->tiling_mode !=
intel_fb_obj(work->old_fb)->tiling_mode)
                        /* vlv: DISPLAY_FLIP fails to change tiling */
                        ring = NULL;
-       } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
-               ring = &dev_priv->ring[BCS];
+//     } else if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev)) {
+//             ring = &dev_priv->ring[BCS];
        } else if (INTEL_INFO(dev)->gen >= 7) {
                ring = i915_gem_request_get_ring(obj->last_write_req);
                if (ring == NULL || ring->id != RCS)

/proc/cpuinfo
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 58
model name      : Intel(R) Core(TM) i7-3537U CPU @ 2.00GHz
stepping        : 9
microcode       : 0x1b
...

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