15952 - Graphic distortion on scrolling

Status: VERIFIED WORKSFORME

(Core Graveyard :: GFX, defect, P3)

Description

[wmwhite]

When I scroll down in M10 under MacOS 8.6, the browser distorts the bottom of the
page.  It grabs pixels from whatever is behind the browser (ie. The desktop)
and incorporates them in the layout.  This means you cannot view pages that
require you to scroll down.

I have a 7500 with built-in video; I am not using a ATI or other third party
video card.

A workaround is to scroll down, and then windowshade back-and-forth.  This
redraws the image and fixes the distortion.

Comment 1

[Eli Goldberg]

wmwhite, how are you scrolling? are you:

	- dragging the scroll bar?
	- or scrolling by a drag-select (bug #15384)

Thanks! (please add comments directly to the bug report)

Comment 2

[Eli Goldberg]

[adding wmwhite's e-mailed response]

  I am scrolling by dargging the scroll bar.  After playing with it a
while, I discovered that this bug only appears in a specific instance:
If you resize a window small enough, the scroll arrows disappear (They do
not seem to be in sync with the window).  When you scroll with the scroll
bar after this happens, you get the bug.

Comment 3

[Eli Goldberg]

hey petersen,

reproduced this on 1999101208 build at www.mozilla.org, doing horizontal
scrolling. As he said, just make the window very small (e.g. 80x80 pixels), and
then scroll. (I can't make the scroll bar disappear, though.)

Comment 4

[Patrick C. Beard]

I can't reproduce this with a 12/29/99 build.

Comment 5

[Chris Petersen]

With the Jan 03 Mac build, I can't reproduce the original problem mentioned by
the reporter.

Comment 6

[Eli Goldberg]

I can't reproduce this either using the 200010308 Mac OS build.