[Bug 1770047] New: Subpixel rendering failure in Fedora 31 for right-aligned windows on a multihead machine.
7:03 p.m.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
Bug ID: 1770047
Summary: Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
Product: Fedora
Version: 31
Hardware: x86_64
OS: Linux
Status: NEW
Component: freetype
Severity: medium
Assignee: mkasik(a)redhat.com
Reporter: alastair(a)d-silva.org
QA Contact: extras-qa(a)fedoraproject.org
CC: ajax(a)redhat.com, caillon+fedoraproject(a)gmail.com,
fonts-bugs(a)lists.fedoraproject.org,
gnome-sig(a)lists.fedoraproject.org,
john.j5live(a)gmail.com, kevin(a)tigcc.ticalc.org,
mclasen(a)redhat.com, mkasik(a)redhat.com,
rhughes(a)redhat.com, rstrode(a)redhat.com,
sandmann(a)redhat.com
Target Milestone: ---
Classification: Fedora
Description of problem:
I have a 3 monitor setup:
Left: Dell 3007WFP 2560x1600
Middle: Seiki 40" 4K TV 3840x2160
Right: Thinkpad T480 builtin 2048x1152
When a Firefox instance (or Gnome Text Editor window) is right aligned
(meta-right) on the middle screen, it displays properly. However, after
switching virtual consoles (ctrl-alt-up/down/left/right), and returning back,
the right aligned window show subpixel rendering artifacts.
I've attached screenshots before & after switching consoles, the window that
displays the problem is the right browser in the middle screen (visiting
Opencores).
This problem did not occur in Fedora 30, only after upgrading to Fedora 31.
The problem also does not occur if I move the window away from the edge of the
centre display.
Version-Release number of selected component (if applicable):
freetype.x86_64 2.10.0-3.fc31 @fedora
How reproducible:
Every time, with my display configuration
Steps to Reproduce:
1. Launch Gnome Text Editor, ensure it is on the middle screen and enter some
text
2. Right align the window (meta-right)
3. Shift away and back to the virtual console
4. Observe text that was currectly rendered in the text editor now has
artifacts
Actual results:
Poorly rendered text
Expected results:
Correctly rendered text
Additional info:
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7:05 p.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
--- Comment #1 from Alastair D'Silva <alastair(a)d-silva.org> ---
Created attachment 1633830
--> https://bugzilla.redhat.com/attachment.cgi?id=1633830&action=edit
Correct rendering before switching workspaces
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7:06 p.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
--- Comment #2 from Alastair D'Silva <alastair(a)d-silva.org> ---
Created attachment 1633831
--> https://bugzilla.redhat.com/attachment.cgi?id=1633831&action=edit
Faulty rendering after switching virtual workspaces
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7:06 p.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
--- Comment #3 from Alastair D'Silva <alastair(a)d-silva.org> ---
Created attachment 1633832
--> https://bugzilla.redhat.com/attachment.cgi?id=1633832&action=edit
Xrandr output describing the monitor layout
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10:32 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
Marek Kašík <mkasik(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fmuellner(a)redhat.com,
| |jadahl(a)redhat.com,
| |otaylor(a)redhat.com,
| |philwyett(a)kathenas.org,
| |walters(a)redhat.com
Component|freetype |mutter
Assignee|mkasik(a)redhat.com |fmuellner(a)redhat.com
--- Comment #4 from Marek Kašík <mkasik(a)redhat.com> ---
Hi,
this is probably an issue in mutter. It seems like scaling between DPIs goes
wrong. This affects also other graphics elements, not just text.
I'm reassigning this to mutter for further investigation.
Btw, there is one possible duplicate of this - #1770148.
Regards
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8:56 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
Jiri Eischmann <jeischma(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jeischma(a)redhat.com
--- Comment #5 from Jiri Eischmann <jeischma(a)redhat.com> ---
Created attachment 1664430
--> https://bugzilla.redhat.com/attachment.cgi?id=1664430&action=edit
Distorted font
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8:57 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
--- Comment #6 from Jiri Eischmann <jeischma(a)redhat.com> ---
I'm experiencing what seems to be the same problem:
I've got two monitors: one 4k on the left, one FullHD on the right (primary).
When there is a window on the primary display that has the left side on the
edge of the two displays, its content is rendered incorrectly, most visible on
the font (see on the attached screenshot). If I move the window somewhere else,
the rendering is fixed.
I'm using Fedora 31 (GNOME on Wayland), but as I just tested the same problem
stays in Fedora 32.
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9:01 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
Olivier Fourdan <ofourdan(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ofourdan(a)redhat.com
--- Comment #7 from Olivier Fourdan <ofourdan(a)redhat.com> ---
https://gitlab.gnome.org/GNOME/mutter/issues/804 ?
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9:04 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
Jiri Eischmann <jeischma(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Link ID| |GNOME Gitlab
| |GNOME/mutter/issues/804
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9:06 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
Jiri Eischmann <jeischma(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jhorak(a)redhat.com
--- Comment #8 from Jiri Eischmann <jeischma(a)redhat.com> ---
*** Bug 1770148 has been marked as a duplicate of this bug. ***
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9:32 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
--- Comment #9 from Kevin Kofler <kevin(a)tigcc.ticalc.org> ---
Note that, unlike the OP's screenshot and the bug subject, Jiri Eischmann's
screenshot is NOT subpixel-antialiased, only grayscale. But it looks similarly
wrong.
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11:05 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
--- Comment #10 from Ben Cotton <bcotton(a)redhat.com> ---
This message is a reminder that Fedora 31 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora 31 on 2020-11-24.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with
a
Fedora 'version' of '31'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version'
to a later Fedora version.
Thank you for reporting this issue and we are sorry that we were not
able to fix it before Fedora 31 is end of life. If you would still like
to see this bug fixed and are able to reproduce it against a later version
of Fedora, you are encouraged change the 'version' to a later Fedora
version prior this bug is closed as described in the policy above.
Although we aim to fix as many bugs as possible during every release's
lifetime, sometimes those efforts are overtaken by events. Often a
more recent Fedora release includes newer upstream software that fixes
bugs or makes them obsolete.
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10:18 a.m.
New subject: [Bug 1770047] Subpixel rendering failure in Fedora 31 for
right-aligned windows on a multihead machine.
https://bugzilla.redhat.com/show_bug.cgi?id=1770047
Ben Cotton <bcotton(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |CLOSED
Resolution|--- |EOL
Last Closed| |2020-11-24 16:18:45
--- Comment #11 from Ben Cotton <bcotton(a)redhat.com> ---
Fedora 31 changed to end-of-life (EOL) status on 2020-11-24. Fedora 31 is
no longer maintained, which means that it will not receive any further
security or bug fix updates. As a result we are closing this bug.
If you can reproduce this bug against a currently maintained version of
Fedora please feel free to reopen this bug against that version. If you
are unable to reopen this bug, please file a new report against the
current release. If you experience problems, please add a comment to this
bug.
Thank you for reporting this bug and we are sorry it could not be fixed.
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