[Bug 91952] [Bisected Regression] Blank screen from boot until any input on X

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91952

--- Comment #7 from João Paulo Rechi Vita <jprvita at gmail.com> ---
I've tested the following diff provided by Maarten on top of v4.2 with no
success:

diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index a387b7db1970..2ba6f10eeca7 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2570,6 +2570,11 @@ intel_find_initial_plane_obj(struct intel_crtc
*intel_crtc,

     kfree(plane_config->fb);

+    if (!drm_mm_initialized(&dev_priv->mm.stolen)) {
+        to_intel_plane(primary)->disable_plane(primary,
                               &intel_crtc->base,
                               true);
+        return;
+    }
+
     /*
      * Failed to alloc the obj, check to see if we should share
      * an fb with another CRTC instead

I'm going to attach a dmesg log with drm.debug=0x1e as requested on IRC.

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