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[Bug 1512111] Re: "Ubuntu Light" font has heavier weight than "Ubuntu"


The test case suggests a change to 'Ubuntu Mono', but the
'Ubuntu_0.831.zip' I have here doesn't have any Ubuntu Mono (nor source,
nor changelog, nor scripting, nor test cases, nor any contextual
information).  I can see:

  2016-01-04 11:31  Zip file (repacked today?)
  2015-12-04 10:55  .ttfs
  2015-12-04 10:53:12..10:53:39, internal timestamps (three-second intervals)

The two positive takeaways are that the version debug glyph shows 0.831,
and from the close-interval timestamps we can deduce that the change(s)
were made in an automated fashion.  The question remains *what those
changes are*.

We can see eg:

  $ otfinfo -s {,/usr/share/fonts/truetype/ubuntu-font-

That the 0.84 files already out in the real world have flags indicating
'Hebrew' and 'Default', which these don't.  Since these support less
than than the higher-numbered version out there, it remains:

  * What are these files for.  What is their purpose, what is supposed to be tested.
  * Are they even targetted for distribution.  If so what are we supposed to do with them when they have a lower version number and less functionality.

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sources in Ubuntu.

  "Ubuntu Light" font has heavier weight than "Ubuntu"

Status in One Hundred Papercuts:
  In Progress
Status in Ubuntu Font Family:
  In Progress
Status in ubuntu-font-family-sources package in Ubuntu:
  In Progress
Status in ubuntu-font-family-sources source package in Wily:

Bug description:
  After upgrading from Vivid to Wily, pages using the "Ubuntu light" font actually renders with a weight heavier than the regular one in web pages.
  This happens with Chrome/Chromium and also the Ubuntu browser.

  After manually reinstalling the 0.80-0ubuntu6 version from Vivid (in
  place of 0.83-0ubuntu1), the issue is fixed.

  See the attached screenshot showing the result seen browing

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: ttf-ubuntu-font-family 0.83-0ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
  Uname: Linux 4.2.0-17-generic x86_64
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Nov  1 17:55:19 2015

  InstallationDate: Installed on 2014-10-14 (382 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140923)
  PackageArchitecture: all
  SourcePackage: ubuntu-font-family-sources
  UpgradeStatus: Upgraded to wily on 2015-10-31 (0 days ago)

  IMPACT: Ubuntu Light font renders incorrectly for all 15.10 users
  which impacts the usability and visual design.

  The new version of font package (0.831) corrects the relationship
  between Light and Medium weight to follow the commonly used naming

  Ubuntu Light	Light	Light Italic		
  Ubuntu	Regular	Italic	Bold	Bold Italic
  Ubuntu Medium	Medium	Medium Italic		
  Ubuntu Condensed	Regular			
  Ubuntu Mono	Regular	Italic	Bold	Bold Italic

  TEST CASE: in 15.10, go to

  If the Light weight renders heavier than Normal weight, the bug is in


  0.831 was tested by manually running in 15.10 and no regression was
  noticed, while the bug was fixed. The potential for regression is

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