Black or White bars at top or bottom of screen

Hi all, 

I am technician at an IT company and we are pulling out our hair over an issue with one of our clients using Google Calendar. 
They are 2 users, both using different computers, both running the latest version of Windows 10 and Chrome.
The symptoms happen at different times on both machines. The symptoms can vary but are generally a form of bar on the top or bottom of the browser. They have to restart the computer for the issue to disappear. They can work around it by reducing the screen size from full screen, to something slightly smaller. 

We have tried Firefox, Edge and Chrome Canary with same symptoms, updating all drivers, BIOS, re installation of the OS and still issues are occurring. We originally thought the issues were graphics related, but they seem to only be happening when in Google Calendar. Seems like an OS bug? 

We have also turns hardware acceleration off in the browsers. 

I have included some screenshots as well. The black bars at the top began in Firefox on Google Calendar and have penetrated other windows that have been placed on top (Acrobat in this example). 

We are using an Intel NUC and a Laptop. 

Any advise would be most appreciated. 
Regards, Sam 

 

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Last updated September 16, 2019 Views 10,230 Applies to:

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Sorry, it's not apparent to me from the picture what the problem is.

If it's of any help to you, here is the official Google Calendar Help Forum.

You know the first things they'll ask you ...

... update to the newest version of Chrome

... disable all extensions

... clear the cache

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Just a regular guy, with no fancy titles or boasts.

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I have already posted in the Google Calendar forums and they have said it isn't an issue with Google Calendar. 

And yes, I have disabled all extensions, cleared cache, and used 3 other browsers all with same symptoms. 

To clarify the problem. Basically a white or black bar will suddenly appear in the top or bottom of the browser which then imposes itself onto other tabs and windows. The first example was taken in Google Maps, but you can see the Google Calendar tab/white bar cutting off the bottom of the screen. 

The second example is taken in Adobe Reader, but you can see that Firefox black bar has imposed itself in both left and right section of the screen and parts of the Adobe application are not visible. 

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Does anyone else have any suggestions or has experienced similar issues? 

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I have the exact same problem.

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Same problem here. It happens with Chrome, Firefox. Next time it happens I will try other applications. 

Very annoying and the only solution for me is to reboot.


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I've been getting this on Chrome, Microsoft word and Whatsapp Web recently.

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I have been following this issue in the Google Forum which has been getting much more attention. 

https://productforums.google.com/forum/#!topic/chrome/kztvALbicwE

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Does anyone else have any suggestions or has experienced similar issues? 

I have experience similar issues when I work in "maximized" view - both with internet browsers (Chrome, Internet Explorer, Edge) as well as with File Explorer. Hasn't occurred with MS Office or Adobe products.  Below are screenshots of both a "maximized" and "restore down" view.  If I go to Display Settings, reset the resolution, then revert back, the issue goes away for a while, but has always returned.

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I have found that this isn't a webbrowser related issue. Opening a folder has the same effect.
I believe it's Windows-related, more speficif Outlook-related! It often occurs right after sending an e-mail (at least in my case) and opening a new e-mail doesn't seem to be effected by the bar. 
Still no solution though...

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In an effort to diagnose the issue I uninstalled Chrome and reinstalled (after saving the bookmarks of course) and the issue returned almost immediately.  Then noticed the issue in IE too (yes just doing diagnostics).

Once I rebooted we tested the same sites again and discovered that the horizontal black (or sometimes white) bars were the same size as bars that were popping up.  So our description of the problem became "popup bars are invisible".

Hope this helps (disabling hardware acceleration didn't, and neither did maximizing or restoring with the squre in the underline, square, x, on the top right of the window.  We'll try F11 next time).

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