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JopSchouten
Community Member

Minus signs disappear in Quizzes

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Problem: in several different Quizzes, the minus signs in my Math equation disappear. The problem occurs randomly on different computers, different days and even on the same day, same webbrowser, it can differ whether you can see the minus sign or not.

I use the Formula Editor to copy my LaTeX math equations. See below for a screenshot: the minus sign is missing, while it is inserted in the math equation: \int_{ -1 }. It also happen with more simple equations...

I hope one of you can help me to solve this issue! It is really important that I can trust the Formula Editor and that students see the same things while making their exams!

Thanks!

Minteken bug Canvas.PNG

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4 Solutions

Accepted Solutions
dpbrock
Community Member

Some of my students are having the same issue. Here is picture of what happens.  Of all the symbols, why the minus sign??  Most figure out the minus for the 1, but not all notice there should be a minus in front of the 3 as well.

Canvas Issue Minus Sign.jpg

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mramir11
Community Participant

Someone emailed me this regarding the negative sign display yesterday: 

There is a known issue some are experiencing in which negative or minus signs are not displaying correctly in Canvas. Right-clicking the equation and opening it in a new tab or zooming in on the image fixes the issue, but if you want to avoid the issue altogether then you can disable hardware acceleration in Google Chrome

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cdavis1921
Community Participant

I have used the Wiris Chem editor in my Canvas courses to enter equations, polyatomic ions, etc. The app is available in the app list in course settings. I haven’t received any reports from students about negative/minus signs not appearing.

http://www.wiris.com/solutions/chemistry

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KOliveras
Community Participant

Try updating Chrome to version 88 (recently released).  This may be related to a bug in Chrome where certain svg lines were not rendering correctly.  I was experienceing this issue over the last few weeks and updated my browser yesterday.  The minus signs seem to have reappeared.  Yay!

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19 Replies
mramir11
Community Participant

I am having the same problem, the negatives are showing up fine for me and several of my students, but this issue is happening to other teachers and some of my students. This is occurring on multiple Canvas infrastructures too. (Arlington and UT Austin)

dpbrock
Community Member

Some of my students are having the same issue. Here is picture of what happens.  Of all the symbols, why the minus sign??  Most figure out the minus for the 1, but not all notice there should be a minus in front of the 3 as well.

Canvas Issue Minus Sign.jpg

View solution in original post

0 Kudos
mramir11
Community Participant

Someone emailed me this regarding the negative sign display yesterday: 

There is a known issue some are experiencing in which negative or minus signs are not displaying correctly in Canvas. Right-clicking the equation and opening it in a new tab or zooming in on the image fixes the issue, but if you want to avoid the issue altogether then you can disable hardware acceleration in Google Chrome

View solution in original post

sjones11
Community Participant

I had a similar issue with a teacher and she cleared it up by updating Chrome and then also clearing out the browsing data.  

imlearning
Community Member

Is this a new bug? Students have only started messaging me about this problem recently. Do we know if there will be a global fix?

mramir11
Community Participant

I'm not sure if there will be a global fix for this anytime soon, but I do know that this is an issue across multiple Canvas instructures (I use both Arlington ISD and UT Austin Canvas Instructures), for now, changing the zoom option (ctrl +/-) usually fixes the issue temporarily.  

kaw
Community Participant

Solutions given by CANVAS to STEM issues are at best untenable.  A solution is given here about right-clicking the image and opening in a new window - how is the student supposed to know - they deserve better.  I tried using textbf and it is a temporary solution.  

\displaystyle\sum_{i=1}^{i=n \ \textbf - \ 1 } i^2

kaw
Community Participant

Try \displaystyle\4x \ \textbf - \ 1 }

 

mranney
Community Member

I followed your directions and I turned off the Hardware Accelerator in my Google Chrome.  Do I also need to have my students do the same or will it correct the problem for my students if I just do it on my end?