[Bug 1470509] New: freetype/harfbuzz fc25->fc26 turns to ugly rendering

https://bugzilla.redhat.com/show_bug.cgi?id=1470509

            Bug ID: 1470509
           Summary: freetype/harfbuzz fc25->fc26 turns to ugly rendering
           Product: Fedora
           Version: 26
         Component: freetype
          Severity: medium
          Assignee: mkasik(a)redhat.com
          Reporter: pb(a)bieringer.de
        QA Contact: extras-qa(a)fedoraproject.org
                CC: behdad(a)fedoraproject.org,
                    fonts-bugs(a)lists.fedoraproject.org,
                    kevin(a)tigcc.ticalc.org, mkasik(a)redhat.com



Description of problem:
While on fc25 I have sharp fonts on a 1600x1200 96 dpi display after upgrade to
fc26 the rendering is ugly


Version-Release number of selected component (if applicable):
freetype-2.7.1-9.fc26.x86_64
harfbuzz-1.4.4-1.fc26.x86_64
harfbuzz-icu-1.4.4-1.fc26.x86_64
(from updates-testing)
+ fc26 original


How reproducible:
at least on 2 systems

Steps to Reproduce:
1. upgrade to fc26
2. login


Actual results:
bad system font rendering

Expected results:
same rendering as on fc25


Additional info:
# xrdb -q
Xft.lcdfilter:    lcddefault
Xft.antialias:    0
Xft.hinting:    1
Xft.hintstyle:    hintslight
Xft.rgba:    rgb
Xft.dpi:    96
Xcursor.theme:    default
Xcursor.size:    21
Xcursor.theme_core:    1

after downgrade with fc25 packages: 
freetype-2.6.5-1.fc25.x86_64.rpm
harfbuzz-1.3.2-1.fc25.x86_64.rpm
harfbuzz-icu-1.3.2-1.fc25.x86_64.rpm 

after reboot returns to previous and well rendering behavior.

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