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[Iain Lane <iain@xxxxxxxxxxxxxxxxxxx>]

I think you can define a font family like in the attached file - which
I've eliminated the Google fonts from, so we're only using the files
shipped in  Ubuntu. This file renders "as expected" in epiphany (webkit)
and Firefox, but not in Chromium (as is the case for the previous
example given).

It *feels* from those results like a problem in Chrome/Chromium, but
maybe not - if Olivier has some time, perhaps he could have a look ... ?
I'm not a HTML/CSS expert so I could just be understanding it wrong and
I'm getting some undefined behaviour cross-browser. If you use Firefox's
inspector you can see that it finds Ubuntu / Ubuntu Light / Ubuntu Bold
properly. Unfortunately it looks like Chromium's only shows the family
so you can't see in great detail what it's doing.

** Attachment added: "test.html"
   https://bugs.launchpad.net/ubuntu/+source/ubuntu-font-family-sources/+bug/1512111/+attachment/5040935/+files/test.html

** Also affects: chromium-browser (Ubuntu)
   Importance: Undecided
       Status: New

** No longer affects: chromium-browser (Ubuntu Wily)

** Changed in: chromium-browser (Ubuntu)
     Assignee: (unassigned) => Olivier Tilloy (osomon)

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https://bugs.launchpad.net/bugs/1512111

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

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

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
  https://www.google.com/fonts#UsePlace:use/Collection:Ubuntu

  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
  Dependencies:

  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
  standards:

  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
  https://www.google.com/fonts#UsePlace:use/Collection:Ubuntu

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

  REGRESSION POTENTIAL

  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
  small.

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