Bug 399107 - micro symbol (mu) missing
Summary: micro symbol (mu) missing
Status: RESOLVED NOT A BUG
Alias: None
Product: okular
Classification: Applications
Component: PDF backend (show other bugs)
Version: 1.5.1
Platform: Other Linux
: NOR normal
Target Milestone: ---
Assignee: Okular developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2018-09-26 14:18 UTC by Kamesh
Modified: 2018-09-30 23:06 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
attachment showing the issue (780.71 KB, image/png)
2018-09-26 14:18 UTC, Kamesh 		Details
fonts in the pdf (339.49 KB, image/png)
2018-09-28 11:38 UTC, Kamesh 		Details
fonts 2 (332.23 KB, image/png)
2018-09-28 11:38 UTC, Kamesh 		Details
fonts 3 (339.71 KB, image/png)
2018-09-28 11:38 UTC, Kamesh 		Details
fonts 4 (333.07 KB, image/png)
2018-09-28 11:38 UTC, Kamesh 		Details
View All Add an attachment

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Description Kamesh 2018-09-26 14:18:42 UTC 
Created attachment 115249 [details]
attachment showing the issue

SUMMARY
micro symbol (mu) missing in the pdf.

STEPS TO REPRODUCE
1. open pdf from http://www.ti.com/lit/ug/spruhz6j/spruhz6j.pdf
2. Scroll to page 5603
3. the mu symbol in the table is missing. Where as firefox seems to be display it properly. 

OBSERVED RESULT
The mu symbol in the table is missing. 

EXPECTED RESULT
Should be able to display the symbol. I did not check for other Greek alphabets. 

SOFTWARE VERSIONS
(available in About System)
KDE Plasma Version: 5.13.5
KDE Frameworks Version: 5.50.0
Qt Version: 5.11.1

ADDITIONAL INFORMATION

I am on KDE neon 5.13
Comment 1 Luigi Toscano 2018-09-26 14:32:50 UTC 
I can see the mu symbol (500 μs, etc).

This is most likely a font replacement problem, outside the domain of Okular. Not all fonts in the document are embedded. Apart from Embededded fonts, which fonts are used for the document in your case? (see File->Properties->Fonts)? Here I have roughly:
Helvetica, almost all Arial variants -> Arimo (some variant of it)
Times New Roman,Bold -> Tinos-Bold
ArialMT and CourierNewPSMT -> DejaVuSans
Comment 2 Kamesh 2018-09-28 11:38:02 UTC 
Created attachment 115292 [details]
fonts in the pdf
Comment 3 Kamesh 2018-09-28 11:38:19 UTC 
Created attachment 115293 [details]
fonts 2
Comment 4 Kamesh 2018-09-28 11:38:32 UTC 
Created attachment 115294 [details]
fonts 3
Comment 5 Kamesh 2018-09-28 11:38:49 UTC 
Created attachment 115295 [details]
fonts 4
Comment 6 Kamesh 2018-09-28 11:39:49 UTC 
I am attaching some more screenshots which details all the fonts in the document.
Comment 7 Luigi Toscano 2018-09-28 12:06:55 UTC 
99% is a problem with the TeX Gyre Heros font. Please try to remove it. The package name is called fonts-texgyre.
Comment 8 Kamesh 2018-09-28 12:44:25 UTC 
Perfect. That is it. I can now see the mu symbol. Thank you so much. 

Strange to see that an existing obscure font can cause a missing font issue.