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            <b><a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [xf86-video-intel] font/image rendering is broken with sna accel method: incorrect detiling"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=91105#c10">Comment # 10</a>
              on <a class="bz_bug_link 
          bz_status_NEEDINFO "
   title="NEEDINFO - [xf86-video-intel] font/image rendering is broken with sna accel method: incorrect detiling"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=91105">bug 91105</a>
              from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
        <pre>(In reply to Edward Sheldrake from <a href="show_bug.cgi?id=91105#c8">comment #8</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=116759" name="attach_116759" title="example screenshot">attachment 116759</a> <a href="attachment.cgi?id=116759&action=edit" title="example screenshot">[details]</a></span>
> example screenshot

> I'm seeing the same thing. GM45, xf86-video-intel latest git, SNA.

> Switching to UXA solves the problem. Don't know if this is related, but I
> recently had to go back to 3GB (2+1) of RAM.</span >

For you 3GiB system, I think you need this kernel patch:

diff --git a/drivers/gpu/drm/i915/i915_gem_tiling.c
b/drivers/gpu/drm/i915/i915_gem_tiling.c
index d16585f788ea..ff96ae9b77bc 100644
--- a/drivers/gpu/drm/i915/i915_gem_tiling.c
+++ b/drivers/gpu/drm/i915/i915_gem_tiling.c
@@ -447,7 +447,10 @@ i915_gem_get_tiling(struct drm_device *dev, void *data,
        }

        /* Hide bit 17 from the user -- see comment in i915_gem_set_tiling */
-       args->phys_swizzle_mode = args->swizzle_mode;
+       if (dev_priv->quirks & QUIRK_PIN_SWIZZLED_PAGES)
+               args->phys_swizzle_mode = I915_BIT_6_SWIZZLE_UNKNOWN;
+       else
+               args->phys_swizzle_mode = args->swizzle_mode;
        if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_17)
                args->swizzle_mode = I915_BIT_6_SWIZZLE_9;
        if (args->swizzle_mode == I915_BIT_6_SWIZZLE_9_10_17)</pre>
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