1014166 - Window does not repaint properly

Status: RESOLVED DUPLICATE of bug 1012213

(Core :: Graphics, defect)

Description

[Marc Auslander]

Attachment: PrtScr of garbled page

I've seen this for a few days.  Sometimes when I page up, the window is not painted correctly with some lines repeated over other lines (I think).  I've seen it in the add-ons page but can't reproduce.  However, this seems repeatable.

visit nytimes.com
page down
open any link in a new tab.  (If necessary, select the new tab)
close the tab
page up in the original tab

verified on an empty profile

Comment 1

[Marc Auslander]

It appears that the 5/15 nightly is good and the 5/16 nightly is bad.

Comment 2

[Ben Kelly [:bkelly, not reviewing]]

Marc, do your broken builds have layers.offmainthreadcomposition.enabled set to true in about:config?

Also, do you see the corruption correct itself after a few seconds?

Just wondering if this is the same as bug 1014138.

Comment 3

[Marc Auslander]

OMTC can be either on or off - fails both ways.  It's normally on now.
Corruption does not correct until something repaints - like switching to another tab and back or page down page up.

Another curiosity.  Moving the window up or down a bit with the up/down arrow keys does not clear this.

Comment 5

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

(In reply to Marc Auslander from comment #10 in bug #1012213)
> Bug 1014166 can be reproduced with layers.offmainthreadcomposition.enabled
> false.  Is this pref still operative or is the old code gone?

Can you still reproduce it after landing the patch from bug #1012213 ?

Comment 6

[Marc Auslander]

This has been fixed as of yesterday.  Thanks.