[Bug 1595414] Re: Awful system-wise generic selection for CJK

[Gunnar Hjalmarsson]

Hi Mingye,

Trying to understand the issue.

In Ubuntu 14.04 the fonts-droid package is installed by default for
everyone, and also part of the Chinese language support. Droid Sans
Fallback should be the default font for Chinese web contents as far as
fontconfig is concerned.

$ lsb_release -ds
Ubuntu 14.04.4 LTS
$ LC_CTYPE=en_US.UTF-8 fc-match -s | head
DejaVuSans.ttf: "DejaVu Sans" "Book"
DejaVuSans-Bold.ttf: "DejaVu Sans" "Bold"
DejaVuSans-Oblique.ttf: "DejaVu Sans" "Oblique"
DejaVuSans-BoldOblique.ttf: "DejaVu Sans" "Bold Oblique"
n019003l.pfb: "Nimbus Sans L" "Regular"
Waree.ttf: "Waree" "Book"
DroidSansFallbackFull.ttf: "Droid Sans Fallback" "Regular"
ukai.ttc: "AR PL UKai CN" "Book"
ukai.ttc: "AR PL UKai HK" "Book"
uming.ttc: "AR PL UMing CN" "Light"

Is this possibly another Chromium/Chrome specific issue?

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https://bugs.launchpad.net/bugs/1595414

Title:
  Awful system-wise generic selection for CJK

Status in fonts-arphic-ukai package in Ubuntu:
  New
Status in fonts-arphic-uming package in Ubuntu:
  New
Status in language-selector package in Ubuntu:
  New
Status in fonts-arphic-ukai source package in Trusty:
  New
Status in fonts-arphic-uming source package in Trusty:
  New
Status in language-selector source package in Trusty:
  New

Bug description:
  In https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/wily/fonts-
  arphic-ukai/wily/revision/6, UMing and UKai are set as generics for
  fonts. However, this set of generics is completely intolerable --
  setting UKai as a generic is like setting Zapfino and/or Comic Sans as
  a system-wise generic, while UMing as a normal (just a bit thin) serif
  sounds a bit better. This yields terrible results on non-Chinese
  systems with non-Chinese lang-attributed websites, like Twitter, on
  Ubuntu 14.04 LTS after installing Chinese language support which
  includes the two arphic fonts mentioned in this report.

  This problem is similar to
  https://bugs.freedesktop.org/show_bug.cgi?id=20911, a long-standing
  system-global fontconfig non-latin fallback problem. See also bug
  #1560548 where these generic settings are considered as 'redundant'
  and proposed for deletion. I have mentioned a third-person report
  about such selection in #1560548 previously, but I have just
  reproduced this bug by myself by installing zh-cn support by mistake.

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