1209903 - Display problem. The invalidated region is not updated until another event nudges the draw method

Status: UNCONFIRMED

(SeaMonkey :: General, defect)

Description

[LJHeal]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0 SeaMonkey/2.38
Build ID: 20150923195647

Steps to reproduce:

Display a web page (bugzilla is a good example); didn't notice until last seamonkey update.
This is a very basic programming problem; the invalidated region is not updated until another event nudges the draw method.  If a sub-menu, actually drag the mouse into the black area; if a window, drag the hot point into the blank area, or resize the window - larger.  


Actual results:

black rectangle not updated, sometimes white rectangle not updated, left blank.
Works okay on the other Windows 7 desktop in my stable; this is a Dell Precision M2400 refurbished; who knows what installer reinstalled Windows 7 but I was left to download all the drivers but that did not change the bug


Expected results:

I haven't set up the source code for debugging, but someone isn't posting an update for the erased rectangle.

Comment 1

[Philip Chee]

Troubleshooting steps:
1. Go to about:config
2. Filter for layers.offmainthreadcomposition.enabled
3. Toggle this to false.

Comment 2

[LJHeal]

After doing the above and restarting Seamonkey, I see no artifacts.

Comment 3

[Philip Chee]

(In reply to LJHeal from comment #2)
> After doing the above and restarting Seamonkey, I see no artifacts.
1. This might be a video driver problem. Try updating your video driver.
2. Go to about:support (that is type "about:support" into the address bar)
Scroll down to the Graphics section.
Cut and paste that section into a comment here.