[Bug 744812] Re: FontConfig/Qt stack choke on Ubuntu Medium font meta-data (No medium in Inkscape and too bold in Qt apps)

[Michał Sawicz]

We've made some progress with three possible versions of the patch:
QML:
unpatched:         http://ubuntuone.com/7a8TfmDRaYUaRYWZUtRmuW
medium:            http://ubuntuone.com/0sZZPdbwYeG9iSIcvMZtSe
medium+demibold/2: http://ubuntuone.com/1Iurc6svseVNZ31sTEjs81
demibold:          http://ubuntuone.com/5fJQHga4xfZiXGuBAIoNO8

Qt GUI:
unpatched:         http://ubuntuone.com/2QVRUraAPK5pr7VlbHmJG1
medium:            http://ubuntuone.com/4ef1K6IseimToUsbGj5ghB
medium+demibold/2: http://ubuntuone.com/0a5N1ArQQbEy0xoxy1RzId
demibold:          http://ubuntuone.com/1xz9HLhm7hYg5s4Vf6NiZo

It seems that the "medium" one is the least wrong, but changes behaviour
for DemiBold for fonts that only have Regular and Bold.

I'm not sure why "medium+demibold/2" for DemiBold selects a font heavier
than Bold. Will investigate as fixing that could yield best results with
smallest behaviour change.

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https://bugs.launchpad.net/bugs/744812

Title:
  FontConfig/Qt stack choke on Ubuntu Medium font meta-data (No medium
  in Inkscape and too bold in Qt apps)

Status in Linux Libertine:
  Unknown
Status in Ubuntu Font Family:
  Invalid
Status in “fontconfig” package in Ubuntu:
  Confirmed
Status in “ubuntu-font-family-sources” package in Ubuntu:
  Confirmed
Status in “fontconfig” source package in Natty:
  Confirmed
Status in “ubuntu-font-family-sources” source package in Natty:
  Fix Released
Status in “fontconfig” source package in Oneiric:
  Confirmed
Status in “ubuntu-font-family-sources” source package in Oneiric:
  Fix Released
Status in “fontconfig” source package in Precise:
  Confirmed
Status in “ubuntu-font-family-sources” source package in Precise:
  Fix Released
Status in “fontconfig” source package in Quantal:
  Confirmed
Status in “ubuntu-font-family-sources” source package in Quantal:
  Confirmed

Bug description:
  [Kubuntu natty up-to-date]
  Hi,
  Without any change on my system, I noticed some days ago that my default font (ubuntu) changed. Some odd behaviour appeared : ubuntu medium 10 pt was ok but ubuntu medium 11pt was bold (-> in my taskbar clock or in kpackapgekit). In fact, after some play with kcm kubuntu font manager, the ubuntu medium 10pt was wrong, since kcm module shows the true appearance of ubuntu medium, which is quite bold. I swapped to ubunu light font
  SO ! I changed font hinting to light (default in kubuntu seems to be medium) and it seems to have solved bugs.
  Anyway, "ubuntu font" management by KDE seems to be strange, and firefox 4 font rendering is worse (imho) with light hinting (but maybe because of unselected "system default" parameter in fonts kcm).

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