25915 - scroll bar doesn't allways work

Status: VERIFIED DUPLICATE of bug 26658

(Core :: XUL, defect, P4)

Description

[thue]

With M13
At apperantly random a page will seem to render normally, but when using the
scrollbar the page isn't scrolled. Also, the curser doesn't change when hovering
over a link. I marked the bug as critical as it happens pretty often.
I noticed that the page blinks gray just before the rendering is finished.

Clicking links work.
Reloading the page solves the problem.
Other open mozilla windows are not affected.(I tend to have severel windows open
at a time, maybe that influences.)

Comment 1

[chris hofmann]

guessing trudelle.

Comment 2

[Peter Trudelle]

Please, one defect per bug report.  We're going to treat the comment on hovering
as an associated symptom, if you want it treated as a separate defect then open
another bug.  Changing summary to reflect one problem.

Also, this is not critical severity, that is reserved for crash, data loss or
severe leak. High frequency does not justify a high severity. Since there is a
simple workaround, I'm changing severity to 'normal', although if you weren't
seeing it a lot it would be 'minor'. 

This isn't really reproducible as written, so any further details would help
justify our spending some time on it.  for now, assigning to evaughan as p4 for
M16.

Comment 3

[thue]

It is only one bug. All the symptons appear at once and only at once. And it is
popping up _very_ regularly.

Comment 4

[Peter Trudelle]

In that case,it should be possible to isolate a set of steps to reproduce.

Comment 5

[thue]

Ok - I got it reproducible at last.
-Go to www.kdevelop.org
-Open screenshot1 in a new window  (rightclick - new window)
-opdate or go to a new page in the old window
-close the old new window
-the old window should now be frozen as reported in the original bug report.

It freezes on lots of other pages, bug the above strategy doesn't work for all
pages.

Comment 6

[thue]

*sigh* it should read
"-close the new window"
as step 4

Comment 7

[thue]

Just want to add that it also freezes in some situations that don't involve
closing a window; but the freezes allways seem to happen when you are loading in
multiple windows simultaneously

Comment 8

[thue]

I have designed a minimalistic test-case.
1) go to http://hjem.get2net.dk/thue_janus_kristensen/test1.html
2) rigth-click link and choose open new window
3) push reload-button on old page (test1.html)
4) close the second window
5) old page should be frozen; try scrooling down or letting the mouse hower over
the link

Again; this is not the only situation it freezes in

Comment 9

[thue]

turning off gfx scroolbars makes the problem go away...

Comment 10

[thue]

Just want to say that it is still there in the feb 21 build, and annoying as
ever (I have to reload ~50% of all pages)

viewmaneger 2 does NOT make the problem go away

Comment 11

[shrirang khanzode]

*** This bug has been marked as a duplicate of 26658 ***

Comment 12

[leger]

Marking Verified as a dup.

Comment 13

[Pulsebot]

Pushed by ffxbld-merge:
https://hg.mozilla.org/releases/mozilla-beta/rev/51611ef7d521
[fenix] For https://github.com/mozilla-mobile/fenix/issues/25915: Remove the hard coded default browser message