1195400 - 2x vertical text scaling while scrolling on various websites.

Status: VERIFIED FIXED

(Core :: Panning and Zooming, defect)

Description

[Mike Hoye [:mhoye]]

While scrolling (in particular on Metafilter, but lots of places) the text will periodically double in vertical size during the scrolling before snapping back to regular text after a brief pause. 

This doesn't occur on all sites, but the ones on which it does occur, it occurs consistently.

I can reproduce this at will, on current OSX and current Nightly, with no zoom.

I've left it as normal severity, but the effect is really hideous, seriously.

Comment 1

[Mike Hoye [:mhoye]]

This is with E10S activated.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

Can you please provide a specific URL you're seeing this on?

Comment 3

[Botond Ballo [:botond]]

Mike, could you also say whether disabling the pref 'layers.async-pan-zoom.enabled' makes the problem go away?

Comment 4

[Mike Hoye [:mhoye]]

Metafilter.com

Comment 5

[Mike Hoye [:mhoye]]

On its own, no, but disabling it and restarting the browser does.

Comment 6

[Botond Ballo [:botond]]

Yeah, sorry, I should've mentioned that pref requires a restart to take effect. Thanks for testing!

I can't repro the problem on Linux with APZ enabled, so it might be something Mac-specific.

Comment 7

[Kartikaya Gupta (email:[e-mail])]

I'm not able to reproduce the issue on my OS X nightly build on metafilter.com. There are probably more factors involved here (and therefore it may not be Mac-specific).

Comment 8

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

I can reproduce this too, but it only seems to happen if I'm on the integrated Intel GPU.

Comment 9

[Brad Lassey [:blassey] (use needinfo?)]

I have seen this while scrolling hotel.com's results page and when loading an etherpad.

Comment 10

[Kartikaya Gupta (email:[e-mail])]

CC'ing nical and dvander as this is most likely a problem somewhere in the gfx layers/tiling code, considering comment 8.

Comment 12

[Markus Stange [:mstange]]

Attachment: testcase

Comment 13

[Markus Stange [:mstange]]

This happens because we try to create an untiled layer larger than the maximum texture size.

Comment 14

[Markus Stange [:mstange]]

Attachment: MozReview Request: Bug 1195400 - Don't use SingleTiledContentClient for layers that are larger than the maximum texture size. r?mattwoodrow

Bug 1195400 - Don't use SingleTiledContentClient for layers that are larger than the maximum texture size. r?mattwoodrow

Comment 15

[Markus Stange [:mstange]]

Attachment: MozReview Request: Bug 1195400 - Check ancestor geometry roots when determining scrollability of a layer. r?mattwoodrow

Bug 1195400 - Check ancestor geometry roots when determining scrollability of a layer. r?mattwoodrow

Comment 16

[Matt Woodrow (:mattwoodrow)]

Comment on attachment 8663426 [details]
MozReview Request: Bug 1195400 - Don't use SingleTiledContentClient for layers that are larger than the maximum texture size. r?mattwoodrow

https://reviewboard.mozilla.org/r/19797/#review17847

::: python/mozbuild/mozbuild/base.py:601
(Diff revision 1)
> +            # print "validating make:", make

I assume this isn't meant to be part of the patch

Comment 17

[Matt Woodrow (:mattwoodrow)]

Comment on attachment 8663427 [details]
MozReview Request: Bug 1195400 - Check ancestor geometry roots when determining scrollability of a layer. r?mattwoodrow

https://reviewboard.mozilla.org/r/19799/#review17849

Comment 18

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/17a4283a8b6f
https://hg.mozilla.org/integration/mozilla-inbound/rev/0a34ebc90b12

Comment 19

[Pulsebot]

Backout:
https://hg.mozilla.org/integration/mozilla-inbound/rev/69881ac19fc0

Comment 20

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/mozilla-central/rev/0a34ebc90b12

Comment 21

[u279076]

Mike, could you please verify this is fixed in the next Nightly build?

Comment 22

[Mike Hoye [:mhoye]]

I'm on 44.0a1 (2015-09-23) and I can't reproduce this anymore. Thanks!

Comment 24

[Mike Hoye [:mhoye]]

As of current nightly I have started seeing this behavior again on this page:

https://medium.com/working-parents-in-america/beyond-doing-half-the-parenting-d92996d7a106 

Should this be reopened, or a new bug?

Comment 25

[Markus Stange [:mstange]]

Eek! New bug, please.

Comment 26

[Mike Hoye [:mhoye]]

bug 1210418 filed, thanks.