1494357 - content loads squished in small area at bottom of viewport

Status: UNCONFIRMED

(Core :: Graphics, defect, P3)

Description

[Sam]

Attachment: Upsidedown1.jpg

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:62.0) Gecko/20100101 Firefox/62.0
Build ID: 20180830143136

Steps to reproduce:

Opened a link in a new tab (Facebook). When it loaded incorrectly, tried to navigate to a new link (LinkedIn) to see if it would fix the problem, but the same issues persisted. This has happened to me once before as well (last week, in a different session of Firefox but on the same phone). 

OnePlus 3T
Firefox for Android 63.0b7
Android 8.0.0 
OxygenOS version 5.0.5 
Kernel Version 3.18.66-perf+ 
OnePlus@ubuntu-209 #1 
Thu Aug 16 14:51:42 CST 2018


Actual results:

Page content loaded squished and upside down in a small area at the bottom of the viewport. Page could still be scrolled through.


Expected results:

Page should have loaded normally.

Comment 1

[Sam]

Attachment: Upsidedown2.jpg

Second screenshot example

Comment 2

[Mike Conley (:mconley) (:⚙️) (PTO Dec 22 - Jan 2)]

Thanks, Sam.

This is pretty wild... hey botond, any idea what's going on here?

Comment 3

[Botond Ballo [:botond]]

Afraid not.

Sam, how often does this occur? How easy it is to recover - e.g. if you close the tab and open a new one, is it fine?

Does it happen with the release version of Firefox (62) too, or only Beta (63)?

Comment 4

[Sam]

It hasn't occurred very often - only 3 times so far, all in the past two weeks. When things load improperly, I tend to get a blank white screen instead of this flipped upside down squished page. I also got the blank white screen when I refreshed the squished pages (I'll upload a screenshot to show you what that looks like).    

For context, the white screens tend to happen when I've got a lot of tabs open and I select "open link in new tab". The new tab won't load properly (i.e. all white). After that happens, any new tab I open manually and type a url into will also load all white. This happens fairly often (possibly even daily, if not several times per week for sure), and typically resolves itself if I close Firefox then reopen it. If that fails, I restart my phone which has always fixed the problem. 

I've explained the white screen problem because the squished screen seemed to follow the same pattern - precipitated by a "open link in tab", but then persisted after that, and once refreshed changed to a white screen. This was resolved once I restarted Firefox. 

I don't use release version, only Beta, so I'm not sure if it happens there too, sorry. I can use it for a bit to see if it happens there too if you'd like?

Comment 5

[Sam]

Attachment: Whitescreen1.jpg

Comment 6

[Sam]

Attachment: Whitescreen2.jpg

Comment 7

[Botond Ballo [:botond]]

Hmm, the fact that it happens when you have a lot of tabs open might suggest an out-of-memory issue. Snorp, have you come across any previous reports of either the white screen issue described in comment 4, or the original ("squished rendering") issue?

Comment 8

[James Willcox (:snorp) ([e-mail]) (he/him)]

I think we have seen the white screen issue in low memory situations. Sometimes what happens is the driver runs out of address space to map the texture memory.