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Bug 1530006 - KDE on Fedora 27 prefers to use Source Han Serif as Sans
Summary: KDE on Fedora 27 prefers to use Source Han Serif as Sans
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: plasma-desktop
Version: 28
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: KDE SIG
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: F28Blocker-kde, F28Target-kde
TreeView+ depends on / blocked
 
Reported: 2017-12-31 23:54 UTC by Mingye Wang
Modified: 2018-09-14 02:05 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2018-09-13 20:00:23 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Mingye Wang 2017-12-31 23:54:35 UTC 
Description of problem:

On KDE installations Fedora 27

Version-Release number of selected component (if applicable):

-

How reproducible:

Always

Steps to Reproduce:
1. Use the live image
2. Open a Chinese web page (baidu.com for example)
3. Install it, and repeat 2

Actual results:

Chinese characters come with serifs, in title bars and in the browser itself despite a "sans-serif" specification

Expected results:

They should blend in with the sans-serif Latin text 

Additional info:

Migrated from 1529984; screenshot in 1529984.
Comment 1 Mingye Wang 2017-12-31 23:54:56 UTC 
(Use Attachment #1375011 [details] as screenshot)
Comment 2 Zamir SUN 2018-01-01 00:10:10 UTC 
I see the owner is orphan, so I am changing the component to kde-i18n in order to get proper attention. Since I am not a KDE user, I might still be wrong in choosing components.
Comment 3 Peng Wu 2018-01-02 07:34:06 UTC 
FYI, we have both Sans and Serif fonts for Chinese now.

URL: https://fedoraproject.org/wiki/Changes/ChineseSerifFonts
Comment 4 Kevin Kofler 2018-01-23 18:06:17 UTC 
I see now why this happens: the KDE Spin intends to blacklist the default CJK fonts and ship only one minimal CJK font (wqy-microhei-fonts) for size reasons:
https://pagure.io/fedora-kickstarts/blob/f27/f/fedora-kde-common.ks#_47

However, in F27, Source Han Serif fonts were added to the default fonts group in comps:
https://pagure.io/fedora-comps/c/c43473695847873ffbe8cbac9d125f7d86b9fbbf?branch=master

Those fonts are missing in the blacklist in fedora-kde-common.ks and thus get installed, whereas Source Han Sans is still blacklisted.

The fix is to add adobe-source-han-serif-cn-fonts and adobe-source-han-serif-tw-fonts to the blacklist, so that wqy-microhei-fonts gets used as intended.

Unfortunately, I don't think this can be fixed without respinning the live media, which is not going to happen officially for F27.
Comment 5 Rex Dieter 2018-01-23 18:09:36 UTC 
I think it's time to drop the font hacks, and just use the distro defaults moving forward.
Comment 6 Kevin Kofler 2018-01-23 18:22:10 UTC 
See also: https://fedoraproject.org/wiki/Changes/ChineseSerifFonts

Also, FYI, note that the default CJK fonts are changing once again for F28:
https://fedoraproject.org/wiki/Changes/JPDefaultFontsToNoto
https://fedoraproject.org/wiki/Changes/KRDefaultFontsToNoto
https://pagure.io/fedora-comps/c/63630d9a404692ded43ead3ec2dc3daf7d859391?branch=master
Chinese is not being changed, it seems.
Comment 7 Kevin Kofler 2018-01-23 18:22:41 UTC 
FYI, these are the updated blacklists:
https://svn.calcforge.org/viewvc/kannolo?view=revision&revision=292
Comment 8 Peng Wu 2018-01-24 07:37:45 UTC 
FYI, we plan to change Chinese fonts for F28 also.
https://fedoraproject.org/wiki/Changes/ChineseDefaultFontsToNoto
Comment 9 Kevin Kofler 2018-03-29 13:40:35 UTC 
This is the change that was done for Chinese:
https://pagure.io/fedora-comps/c/a99f051020771d2cfba9e895e23afa59f5cc0ba0?branch=master

So the blacklist as it is there now is entirely ineffective, it may as well be removed if you do not update it (and my "updated" blacklist from comment #7 is already outdated as well). (But at least that means that this bug is not going to happen for fresh installations of F28.)
Comment 10 Kevin Kofler 2018-03-29 15:05:56 UTC 
Updated blacklist for F28 and Rawhide:
https://svn.calcforge.org/viewvc/kannolo/trunk/kickstart/kannolo.ks?revision=316&view=markup#l206
Comment 11 Rex Dieter 2018-03-31 14:15:12 UTC 
Opting to omit the erroneous font blacklists for now:

https://pagure.io/fedora-kickstarts/pull-request/372

(at least until there's a consensus on how best to handle the size issue, there's an ongoing thread on -devel list)
Comment 12 Mingye Wang 2018-09-14 02:05:45 UTC 
Wait a sec... If I am reading the blacklists right, it is suggesting that the Fedora spins are installing a Sans to replace some Sans, which should have been mostly acceptable and not intruduce something like a "serif as sans" situation. Seeing the Serif gets used in the presence of WenQuanYi indicates some sort of fontconfig configuration problems in one of these packages. Is WenQuanYi not offering itself as a Sans or is SourceHanSerif somehow yelling about it being a Sans?
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