882348 - Windows Server 2013 reftest failures

Status: RESOLVED WORKSFORME

(Core :: Layout, defect)

Description

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

On Windows Server 2013 over RDP with RemoteFX software GPU and D3D10, DirectWrite, and Direct2D enabled, we fail a number of reftests:

css-gradient:  linear-diagonal-9a, radial-2[abcdef], aja-linear-2[abd], aja-linear-6a
text-overflow/aligned-baseline.html
image-element/gradient-html-07b.html

They all look visually identical and correct to the reftests; max difference is 1 (2 in aligned-baseline).  I'm guessing the pixel rendering is just slightly different between the two rendering approaches.  Just add fuzz?

Comment 1

[Jim Mathies [:jimm]]

We still have a couple failing ref tests on our new win hardware with win8, you might find some dupes there - bug 847447.

Comment 2

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Could be -- only dependencies there are intermittent test failures.  I didn't see any of those, but I also didn't have too many runs.

Comment 3

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Note -- all of these reftest failures might be due to different settings for RDP, e.g. with font smoothing disabled.  I've asked for them to be set to a fixed set in bug 886640 comment #26.

Comment 4

[Chris Peterson [:cpeterson]]

None of these tests are disabled on Win64 today (skip-if processor == "x86_64"), so presumably these tests are no longer failing on Win64.

searchfox.org/mozilla-central/search?q=skip-if.*processor&regexp=true