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    <p><tt>The good news is:</tt></p>
    <p><tt>I downloaded cairo source 1.14.12 and compiled it on RHEL
        7.5, which creates libcairo.so.2.11400.12</tt></p>
    <p><tt>If I throw this into /usr/lib64 and run ldconfig, the problem
        goes away.</tt></p>
    <p><tt>Font size varies in steps as it should.</tt></p>
    <p><tt><br>
      </tt><tt>[alois@as80 devlop]$ ctest1</tt><tt>  bitmap<br>
      </tt><tt>9.0 pt on  Size: 49x7    9.0 pt off  Size:
        45.4966x6.80713</tt><tt><br>
      </tt><tt>9.1 pt on  Size: 49x7    9.1 pt off  Size:
        46.0021x6.88276</tt><tt><br>
      </tt><tt>9.2 pt on  Size: 49x7    9.2 pt off  Size: 46.5076x6.9584</tt><tt><br>
      </tt><tt>9.3 pt on  Size: 49x7    9.3 pt off  Size:
        47.0131x7.03403</tt><tt><br>
      </tt><tt>9.4 pt on  Size: 49x7    9.4 pt off  Size:
        47.5187x7.10967</tt><tt><br>
      </tt><tt>9.5 pt on  Size: 51x7    9.5 pt off  Size: 48.0242x7.1853</tt><tt><br>
      </tt><tt>9.6 pt on  Size: 51x7    9.6 pt off  Size:
        48.5297x7.26094</tt><tt><br>
      </tt><tt>9.7 pt on  Size: 51x7    9.7 pt off  Size:
        49.0352x7.33657</tt><tt><br>
      </tt><tt>9.8 pt on  Size: 51x7    9.8 pt off  Size:
        49.5407x7.41221</tt><tt><br>
      </tt><tt>9.9 pt on  Size: 51x7    9.9 pt off  Size:
        50.0462x7.48784</tt><tt><br>
      </tt><tt>10.0 pt on  Size: 51x7    10.0 pt off  Size:
        50.5518x7.56348</tt></p>
    <p><tt></tt><tt>[alois@as80 devlop]$ ctest2</tt><tt>  PDF<br>
      </tt><tt>9.0 pt on  Size: 45.4966x6.80713    9.0 pt off  Size:
        45.4966x6.80713</tt><tt><br>
      </tt><tt>9.1 pt on  Size: 46.0021x6.88276    9.1 pt off  Size:
        46.0021x6.88276</tt><tt><br>
      </tt><tt>9.2 pt on  Size: 46.5076x6.9584    9.2 pt off  Size:
        46.5076x6.9584</tt><tt><br>
      </tt><tt>9.3 pt on  Size: 47.0131x7.03403    9.3 pt off  Size:
        47.0131x7.03403</tt><tt><br>
      </tt><tt>9.4 pt on  Size: 47.5187x7.10967    9.4 pt off  Size:
        47.5187x7.10967</tt><tt><br>
      </tt><tt>9.5 pt on  Size: 48.0242x7.1853    9.5 pt off  Size:
        48.0242x7.1853</tt><tt><br>
      </tt><tt>9.6 pt on  Size: 48.5297x7.26094    9.6 pt off  Size:
        48.5297x7.26094</tt><tt><br>
      </tt><tt>9.7 pt on  Size: 49.0352x7.33657    9.7 pt off  Size:
        49.0352x7.33657</tt><tt><br>
      </tt><tt>9.8 pt on  Size: 49.5407x7.41221    9.8 pt off  Size:
        49.5407x7.41221</tt><tt><br>
      </tt><tt>9.9 pt on  Size: 50.0462x7.48784    9.9 pt off  Size:
        50.0462x7.48784</tt><tt><br>
      </tt><tt>10.0 pt on  Size: 50.5518x7.56348    10.0 pt off  Size:
        50.5518x7.56348</tt><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 29.09.18 11:25, Alois Treindl wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:2d99b847-3691-b2b1-8bbc-620b0fcc1082@astro.ch">
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      <p>It is important to know which version of cairo I am using.</p>
      <p>The sample I posted earlier is run on
        cairo-1.14.8-2.el7.x86_64on RHEL7.5</p>
      <p>The problem appeared only with the update of Redhat Linux from
        RHEL6 to RHEL7.</p>
      <p>If I run the samples on the old machine, which has
        cairo-1.10.2-1.el6.x86_64, the fonts scale properly:</p>
      <br>
    </blockquote>
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