1034952 - Content disappears temporarily when scrolling in item with overflow scroll

Status: RESOLVED INCOMPLETE

(Core :: Graphics, defect)

Description

[Sam H]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:30.0) Gecko/20100101 Firefox/30.0 (Beta/Release)
Build ID: 20140605174243

Steps to reproduce:

Went to https://www.digitalocean.com/community/tutorials/how-to-configure-a-mail-server-using-postfix-dovecot-mysql-and-spamassasin

Right under "Step 1: Install Packages", I scrolled the code block horizontally.


Actual results:

The content disappeared for a few seconds.


Expected results:

Content should not disappear.

Comment 1

[Andre Klapper]

Not reproducible - probably specific to your graphics.

Comment 2

[:Gijs (he/him)]

Can you copy/paste the graphics section of the page from Help > Troubleshooting information into this bug?

Comment 3

[Sam H]

Device ID	0x 640
GPU Accelerated Windows	1/1 OpenGL (OMTC)
Vendor ID	0x10de
WebGL Renderer	NVIDIA Corporation -- NVIDIA GeForce GT 120 OpenGL Engine
windowLayerManagerRemote	true
AzureCanvasBackend	quartz
AzureContentBackend	quartz
AzureFallbackCanvasBackend	none
AzureSkiaAccelerated	0

Comment 4

[:Gijs (he/him)]

(In reply to [e-mail] from comment #3)
> Device ID	0x 640
> GPU Accelerated Windows	1/1 OpenGL (OMTC)
> Vendor ID	0x10de
> WebGL Renderer	NVIDIA Corporation -- NVIDIA GeForce GT 120 OpenGL Engine
> windowLayerManagerRemote	true
> AzureCanvasBackend	quartz
> AzureContentBackend	quartz
> AzureFallbackCanvasBackend	none
> AzureSkiaAccelerated	0

Thanks! I forgot to ask something else: if you go into the preferences, under "Advanced", and toggle off hardware acceleration and then restart, does the problem go away?

Comment 5

[Sam H]

Why yes it does!

Comment 6

[Sam H]

Though I'd like to point out that previous to version 30, I had hardware acceleration on and did not have this problem.

Comment 7

[:Gijs (he/him)]

(In reply to [e-mail] from comment #6)
> Though I'd like to point out that previous to version 30, I had hardware
> acceleration on and did not have this problem.

That's also good to know!

And it's still a bug that you're seeing what you're seeing (on 30) when hardware acceleration is turned on, so we should fix that... can you doublecheck against a copy of nightly (33, https://nightly.mozilla.org/ ) that we've not fixed it already (probably best to use a new profile for it, see https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles )? :-)

Comment 8

[:Gijs (he/him)]

Milan, looks like the geforce chip is on 2009-model mac pros...

I don't know what the best way forward here is, although I'm somewhat interested because the symptoms sound similar to stuff that I and others have seen intermittently on our more recent mbps, with bits of the tab bar going blank occasionally (for which we have no solid STR - not even sure there's an existing bug).

Can you help move this further? :-)

Comment 9

[Sam H]

Works perfectly in the nightly version. Any hope of someone retrofixing it for earlier versions of Firefox?

Comment 10

[:Gijs (he/him)]

(In reply to [e-mail] from comment #9)
> Works perfectly in the nightly version. Any hope of someone retrofixing it
> for earlier versions of Firefox?

Ah, hrm. That depends how it got fixed... this might be a dupe of bug 987497, in which case it should be fixed in Firefox 31 as well? You'd have to give that a shot yourself, as I can't reproduce on Firefox 30 on my machine ( downloads are available from https://beta.mozilla.org/ ). If not, we'd have to figure out what fixed it. The easiest way to do that is using mozregression ( http://mozilla.github.io/mozregression/ ) from Terminal.app .

Comment 11

[:Gijs (he/him)]

(31 beta will be released as 'stable' in just over 2 weeks, and because this issue is relatively minor, corrects itself, and doesn't affect too many people, it's probably not worth doing another 30.0.1 release or something of that sort to backport the fix if it's already fixed on 31)

Comment 12

[Sam H]

True, I can just leave hardware acceleration disabled till it's fixed. Not a big deal. Thanks for all your help, Gijs!

Comment 13

[:Gijs (he/him)]

(In reply to [e-mail] from comment #12)
> True, I can just leave hardware acceleration disabled till it's fixed. Not a
> big deal. Thanks for all your help, Gijs!

Wait, does that mean it's fixed on 31? :-)

Comment 14

[Sam H]

Not sure, don't know how to grab version 31.

Comment 15

[:Gijs (he/him)]

(In reply to [e-mail] from comment #14)
> Not sure, don't know how to grab version 31.

From https://beta.mozilla.org/ . :-)

Comment 16

[Sam H]

Nope, not fixed in 31.

Comment 17

[:Gijs (he/him)]

(In reply to [e-mail] from comment #16)
> Nope, not fixed in 31.

Hrm. Well, in that case, it would perhaps be nice if we knew what fixed this on Nightly... you could find out using mozregression if you're comfortable with using Terminal.app? (see comment #10 for the link)

Comment 18

[Sam H]

I can no longer replicate this. I suppose it was fixed? Or something else was causing it and I removed the culprit.. I don't remember.