Bug 795463

Summary:	menu hides when mouse cursor moves to next menuitem
Product:	Red Hat Enterprise Linux 6	Reporter:	Aleš Mareček <amarecek>
Component:	firefox	Assignee:	Martin Stransky <stransky>
Status:	CLOSED WONTFIX	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	high	Docs Contact:
Priority:	unspecified
Version:	6.2	CC:	ryan.stanyan, stransky, tpelka
Target Milestone:	rc	Keywords:	Regression
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-06 11:06:13 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:

Description Aleš Mareček 2012-02-20 15:52:20 UTC

Description of problem:
There is a problem with menu of Firefox (and also Thunderbird) when mouse cursor moves to next menuitem - it hides. It is possible to select menuitem with arrows of keyboard but not with mouse. I ran it via vnc, versions of 3.x.y work well.

Version-Release number of selected component (if applicable):
firefox-10.0.1-1.el6_2, thunderbird-10.0.1-3.el6_2 (and also 5_8 versions)

How reproducible:
Always

Steps to Reproduce:
1. Install FF10
2. Connect computer via VNC
3. Try to click on some menuitem inside menu "File' / 'Edit' / ...
  
Actual results:
Menu hides.

Expected results:
Possible to click on any menuitem.

Additional info:
I also got an error: "Failed to create drawable", but FF10 and TB10 have been installed with any problem.

Comment 5 Ryan Stanyan 2012-04-06 01:04:32 UTC

I seem to be having a similar problem with 10.0.3 on RHEL 6.2.  After not using Firefox for a while using the drop-down menus disappear when you try to select them.  I can stop this behaviour temporarily when I minimize and restore the window.

I am suspecting this might have something to do with hardware acceleration since I can't duplicate it when desktop effects are off.  Firefox also has a hardware acceleration feature that you can access by the following:

Edit > Preferences > Advanced > General > Use hardware acceleration when available

I'm going to try this out and hopefully it will solve what I'm seeing.

I don't use Thunderbird but there might be something similar there.