[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

QA Administrators  changed:

   What|Removed |Added

 Status|NEEDINFO|RESOLVED
 Resolution|--- |INSUFFICIENTDATA

--- Comment #14 from QA Administrators  ---
Dear Bug Submitter,

Please read this message in its entirety before proceeding.

Your bug report is being closed as INSUFFICIENTDATA due to inactivity and
a lack of information which is needed in order to accurately
reproduce and confirm the problem. We encourage you to retest
your bug against the latest release. If the issue is still
present in the latest stable release, we need the following
information (please ignore any that you've already provided):

a) Provide details of your system including your operating
   system and the latest version of LibreOffice that you have
   confirmed the bug to be present

b) Provide easy to reproduce steps – the simpler the better

c) Provide any test case(s) which will help us confirm the problem

d) Provide screenshots of the problem if you think it might help

e) Read all comments and provide any requested information

Once all of this is done, please set the bug back to UNCONFIRMED
and we will attempt to reproduce the issue. Please do not:

a) respond via email 

b) update the version field in the bug or any of the other details
   on the top section of our bug tracker

Warm Regards,
QA Team

MassPing-NeedInfo-20180404

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #13 from QA Administrators  ---
Dear Bug Submitter,

This bug has been in NEEDINFO status with no change for at least
6 months. Please provide the requested information as soon as
possible and mark the bug as UNCONFIRMED. Due to regular bug
tracker maintenance, if the bug is still in NEEDINFO status with
no change in 30 days the QA team will close the bug as INSUFFICIENTDATA
due to lack of needed information.

For more information about our NEEDINFO policy please read the
wiki located here:
https://wiki.documentfoundation.org/QA/Bugzilla/Fields/Status/NEEDINFO

If you have already provided the requested information, please
mark the bug as UNCONFIRMED so that the QA team knows that the
bug is ready to be confirmed.

Thank you for helping us make LibreOffice even better for everyone!

Warm Regards,
QA Team

MassPing-NeedInfo-Ping-20180302

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

Xisco Faulí  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEEDINFO
 CC||xiscofa...@libreoffice.org
 Ever confirmed|0   |1

--- Comment #12 from Xisco Faulí  ---
Could you please try to reproduce it with the latest version of LibreOffice
from https://www.libreoffice.org/download/libreoffice-fresh/ ?
I have set the bug's status to 'NEEDINFO'. Please change it back to
'UNCONFIRMED' if the bug is still present in the latest version.

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #11 from Aron Budea  ---
Seems like there's nothing I can do here, but that's a lot of helpful details,
thank you for the exhaustive update.

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #10 from Luke Kendall  ---
Created attachment 125027
  --> https://bugs.documentfoundation.org/attachment.cgi?id=125027=edit
Two more screenshots of other open docs, before restarting LO

Here's a little more data: of the 7 or 8 documents I had open, more than half
displayed correctly; three in total had the wrong fonts being used, and one of
these had the wrong font and even the wrong characters displayed.  See the
additional two screenshots.

None of these other documents were "modified" (I had saved them all and they
had been unchanged for days), so it seems very interesting to me that some
displayed quite correctly, some badly, and that the document I was mainly
working on was lonly using the wrong font in the page header - and also
corrected itself with no action from me (apart from bringing its window to the
front)!

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #9 from Luke Kendall  ---
When I said "title" I meant to say "page header". Also, I see it's not only the
style, but the font itself that is wrong (it should be Times New Roman).

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #8 from Luke Kendall  ---
Created attachment 125026
  --> https://bugs.documentfoundation.org/attachment.cgi?id=125026=edit
Screenshots during and after problem, confirms previous comment

I wasn't sure if it was relevant when I started making this comment, but I just
now approved some updates, with LO open, and weird things are happening now.  I
managed to add one sentence to my long document, and then the LO window was
greyed out (indication by Metacity desktop that the process is CPU bound).  I
noticed that the Adobe Flash update included a mention of an update to the
noto-sans (IIRC) font.  I also saw from ps that "unity-settings" and "fc-cache"
were about 95% busy.

$ ps ax | egrep -i "(unity-sett|fc-cache)"
 2555 ?Ssl   12:13 /usr/lib/unity-settings-daemon/unity-settings-daemon
 2626 ?Sl 0:00 /usr/lib/unity-settings-daemon/usd-printer
 2672 ?Sl 0:05
/usr/lib/unity-settings-daemon/unity-fallback-mount-helper
21865 pts/25   RN+0:46 fc-cache -s -v
21884 pts/2S+ 0:00 grep -E -i (unity-sett|fc-cache)
/home/..1../books/leeth$ ps ax | egrep -i "(unity-sett|fc-cache)"
 2555 ?Ssl   12:13 /usr/lib/unity-settings-daemon/unity-settings-daemon
 2626 ?Sl 0:00 /usr/lib/unity-settings-daemon/usd-printer
 2672 ?Sl 0:05
/usr/lib/unity-settings-daemon/unity-fallback-mount-helper
22134 pts/2S+ 0:00 grep -E -i (unity-sett|fc-cache)

soffice got the bulk of the rest of the CPU time.  When those two processes
finished running (after several minutes), soffice went to 100% CPU.  As it's
currently stopped me from working, I thought I may as well take the time to
report it, as it may be related.

Ah ha!  Yes, I just noticed that the page header text on display has changed
(wrong character style within my name).  It's also now locked up completely -
I'm going to have to kill it.  The window got obscured while I was making this
report, and when I just brought it back to the foreground, it displays with the
overlapping contents of the windows in front of it: it can't even refresh
properly.  (So: locked up for about 15 mins.)

I did manage to grab a stack backtrace; it's below.  Oh, and how fortunate that
I took the time needed to do this, live: LO has *just now* returned to normal
(apparently) without me needing to kill it.  And without me doing anything, the
title is now drawing correctly.  By great good luck, I got screenshots of LO's
window, both messed-up and recovered-by-itself, which I have attached.
(LO-97958.zip)



0x7ff23b6a9c21 in
psp::PrintFontManager::fillPrintFontInfo(psp::PrintFontManager::PrintFont*,
psp::FastPrintFontInfo&) const ()
   from /usr/lib/libreoffice/program/libmergedlo.so
(gdb) where
#0  0x7ff23b6a9c21 in
psp::PrintFontManager::fillPrintFontInfo(psp::PrintFontManager::PrintFont*,
psp::FastPrintFontInfo&) const ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#1  0x7ff23b6a9e8f in psp::PrintFontManager::getFontFastInfo(int,
psp::FastPrintFontInfo&) const () from
/usr/lib/libreoffice/program/libmergedlo.so
#2  0x7ff23b6dbcfa in
CairoTextRender::GetDevFontList(PhysicalFontCollection*) () from
/usr/lib/libreoffice/program/libmergedlo.so
#3  0x7ff23b4b1073 in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#4  0x7ff23b4b0fbd in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#5  0x7ff23b4b0fbd in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#6  0x7ff23b4b0fbd in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#7  0x7ff23b4b0fbd in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#8  0x7ff23b4b0fbd in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#9  0x7ff23b4b0fbd in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#10 0x7ff23b4b0fbd in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#11 0x7ff23b4b1959 in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#12 0x7ff23b4b42fc in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#13 0x7ff23b4140ed in ?? ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#14 0x7ff23b67b596 in SalGenericDisplay::DispatchInternalEvent() ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#15 0x7ff2251f1ee9 in ?? ()
   from /usr/lib/libreoffice/program/libvclplug_gtklo.so
#16 0x7ff2251f1f61 in ?? ()
   from /usr/lib/libreoffice/program/libvclplug_gtklo.so
#17 0x7ff234c74fda in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x7ff234c75380 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x7ff234c7542c in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x7ff2251f1407 in ?? ()
   from /usr/lib/libreoffice/program/libvclplug_gtklo.so
#21 0x7ff23b60c45c in Application::Reschedule(bool) ()
   from /usr/lib/libreoffice/program/libmergedlo.so
#22 

[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #7 from Luke Kendall  ---
Yes.  I'm now on version 5.1.2.2, but still using it on Ubuntu 16.04 with
Metacity (traditional, non-Unity) desktop.

It seems to happen if I have LO running and an update to font utilities or font
libraries occur.  By that I mean, each time it happens (and it's occurred four,
maybe six times now), it's after I have approved some recommended upgrades to
sets of packages, and I remember there were some font-ish packages mentioned.

Sorry I can't be more explicit than that.  My *guess* is that something
invalidates a font cache, and LO has pointers to the wrong font renderings,
since exiting LO and reopening all the files that were open works around the
problem.

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

Aron Budea  changed:

   What|Removed |Added

 CC||ba...@caesar.elte.hu

--- Comment #6 from Aron Budea  ---
Luke, did you encounter font display issues since your last comment?

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #5 from Luke Kendall  ---
Oh, and quitting LO and restarting (re-opening each document) fixed the font
display problem.

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #4 from Luke Kendall  ---
I've been working heavily with 5.1.0.3 since Feb 20th, with no repeat of the
problem until today, when it became egregious. But this time it was obvious why
- I just accepted the installation of a whole swathe of package updates from
Ubuntu's Update Manager, and afterwards, everything was horrible. (Ubuntu
16.04.)

Also of possible interest was that after the update, I opened a new text
document and typed three letters, then changed the Text Body paragrpah style to
use Time New Roman 14pt, then zoomed the text, then dragged the bottom edge of
the window larger by about 1cm so I could see the whole page.  And with that
final operation, LO locked up completely, going approx. 100% CPU bound. 
Instead of panicking, though, I did soemthing else for 45mins and noticed that:
1) LO was responsive again
2) LO was far from CPU bound
3) Test was displaying with bizarre/random fonts

My guess is that some fonts or some font libraries were replaced, and that
perhaps LO went busy while it recalculated (and ruined) its font cache?

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

--- Comment #3 from Luke Kendall  ---
Okay, I have upgraded t o5.1 just now, and I'll be working on the files heavily
from tomorrow, so I'll let you know what happens.

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

Beluga  changed:

   What|Removed |Added

 CC||todven...@suomi24.fi

--- Comment #2 from Beluga  ---
Could you test with LibreOffice 5.1.0, just to check?
https://wiki.documentfoundation.org/Installing_in_parallel/Linux

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[Libreoffice-bugs] [Bug 97958] Sometimes, display of font goes badly wrong, depending on zoom factor

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=97958

Luke Kendall  changed:

   What|Removed |Added

 CC||l...@zeta.org.au

--- Comment #1 from Luke Kendall  ---
Created attachment 122747
  --> https://bugs.documentfoundation.org/attachment.cgi?id=122747=edit
Some more screenshots, after closed and re-opened

I spoke too soon when I said that closing and re-opening the file solved the
problem. When I scrolled down and re-commenced my work, some characters were
displayed wrongly: at first, I noticed that just all the Regular "P" characters
were being displayed as Italic (screenshot LO-fonts-bizarre-5.png) - three
instances. But again, depending on the zoom factor, different characters
displayed wrongly. It may be interesting that in this case, the only errors
were the Italic/Regular style being wrong. 

LO-fonts-bizarre-8.png is the only zoom factor showing correct rendering of the
text (maybe showing correct selection of bitmaps from a font cache?).

This time, closing and re-opening the file did *not* correct the problem.

I had three documents open: after exiting from LO completely and then
re-opening all three documents, the incorrect character display went away.

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