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phetsims / greenhouse-effect

"Greenhouse Effect" is an educational simulation in HTML5, by PhET Interactive Simulations.
GNU General Public License v3.0
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Photons disappeared #348

Open KatieWoe opened 1 year ago

KatieWoe commented 1 year ago

Test device iPad 6th Gen Operating System iPadOS 16.6 Browser Safari Problem description For https://github.com/phetsims/qa/issues/970. The photons on the second screen disappeared. The temperature and sound still behaved as expected, but no photons appeared. This was seen after the sim had been open for at least 10 minutes and locked for most of that time (I had stepped out of the office for a minute). The photons on the third page still showed up. Only refreshing the whole sim fixed this, and I haven't been able to reproduce it so far.

Visuals IMG_0113

jbphet commented 1 year ago

@jonathanolson - I'm using sprites to display the photons, and I believe this uses the graphics coprocessor. Is it possible that iOS turned something off to save power and its state wasn't subsequently restored correctly? Is there anything we can do about a situation like this?

jbphet commented 1 year ago

@arouinfar - I'd like to request your input as to whether this is blocking for an RC in case we don't hear from @jonathanolson or if there aren't any good ideas on how to address it.

arouinfar commented 1 year ago

@arouinfar - I'd like to request your input as to whether this is blocking for an RC

No, I wouldn't consider this blocking, especially since @KatieWoe hasn't found a reproducible case. It seems likely that this bug exists in the published version of the sim too.

jonathanolson commented 1 year ago

Do you know if it's possible to tether to the iPad to see if there are console errors?

KatieWoe commented 1 year ago

I haven't done so in awhile, but we could do it if there was a reproducible case. As it is, I only saw this once.