** Summary changed:

- upgrading font causes interface text to be replaced by squares
+ upgrading Cantarell causes visual glitches in GNOME Shell until restarted

** Bug watch added: Debian Bug tracker #788791
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=788791

** Also affects: fonts-cantarell (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=788791
   Importance: Unknown
       Status: Unknown

** Description changed:

+ Upgrading fonts-cantarell may cause visual glitches in GNOME Shell. You
+ need to restart your computer after upgrading this font.
+ 
+ Original Bug Report
+ ===================
+ 
  Hello,
  
  On Ubuntu 16.04 LTS, with unattended upgrades, using gnome3 as desktop
  environment, I have just witnessed the following problem :
  
  - The upgrade to the latest release occurred a few minutes ago :
  
  $ tail /var/log/apt/history.log
  [...]
  Start-Date: 2016-07-08  11:10:07
  Commandline: /usr/bin/unattended-upgrade
  Upgrade: fonts-cantarell:amd64 (0.0.21-1, 0.0.24-1~ubuntu16.04.0), 
lsb-release:amd64 (9.20160110ubuntu0.1, 9.20160110ubuntu0.2), lsb-base:amd64 
(9.20160110ubuntu0.1, 9.20160110ubuntu0.2), tzdata:amd64 (2016d-0ubuntu0.16.04, 
2016f-0ubuntu0.16.04)
  End-Date: 2016-07-08  11:10:15
  
  - Instantly, all characters in the top bar (open windows, date, dropdown
  menus) have been replaced by small solid rectangles (sorry, did not
  think of capturing a screenshot). If important : language is french
  (locale : fr_FR.UTF-8)
  
  - Logging out from my gnome3 session, and then logging back in fixes the
  problem.
  
  I would have expected the font package upgrade to go more smoothly
  (possibly refresh the gnome3 interface at the end of the process ?)
  
  Thanks for your efforts,

** Changed in: fonts-cantarell (Ubuntu)
       Status: Confirmed => Triaged

** Changed in: fonts-cantarell (Ubuntu)
   Importance: Undecided => Medium

** No longer affects: ubuntu-gnome

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https://bugs.launchpad.net/bugs/1600160

Title:
  upgrading Cantarell causes visual glitches in GNOME Shell until
  restarted

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