Bug 190895

Summary:	bzflag locks keyboard
Product:	[Fedora] Fedora	Reporter:	Pedro Matiello <pmatiello>
Component:	bzflag	Assignee:	Nils Philippsen <nphilipp>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	5
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	f7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-11-08 12:41:40 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Pedro Matiello 2006-05-06 01:09:39 UTC

Description of problem:
After some time of playing (can be from few minutes to about an hour), bzflag
locks the keyboard. Mouse keeps moving, but clicks are ignored. I can't even
switch to another terminal with CTRL+ALT+Fn or kill X with CTRL+ALT+BACKSPACE.

Version-Release number of selected component (if applicable):
bzflag-2.0.4-3

How reproducible:
Always, if I play enough time.

Steps to Reproduce:
1. Just play
2.
3.
  
Actual results:
Keyboard locks.

Expected results:


Additional info:
Not sure if it's relevant, but I have an ATI card. I'm NOT using ATI proprietary
drivers, but the free driver that comes with fc5.

If some other info is needed, please let me know and I will provide it.

Comment 1 Pedro Matiello 2006-05-06 04:03:00 UTC

I've done some research and it seems to be just a bug in bzflag that makes it
freeze. As bzflag grabs the keyboard, when it freezes the keyboard gets locked
because bzflag is holding it.

I found a way to take the keyboard focus away from bzflag. These lines have to
be added to xorg.conf:

Section "ServerFlags"
        Option "AllowDeactivateGrabs" "true"
EndSection

Then, you can send the keyboard focus to X by hiting CTRL+ALT+Numpad-/. After
that, it's possible to CTRL+ALT+Fn or even ALT+F2 and then kill bzflag.

Maybe these lines shoud be added by default to xorg.conf?

Comment 2 Nils Philippsen 2007-11-07 16:59:13 UTC

While this is a feasible workaround, I don't think adding that to the default X
configuration is the right thing to do. Do you still experience these problems
with current Fedora versions (F7 or F8)?

Comment 3 Pedro Matiello 2007-11-07 20:47:56 UTC

I haven't tried Fedora 8 yet (I'll download the final release tomorrow), but the
problem seems to be gone in Fedora 7.

Anyway, the xorg fix proposed would work as a workaround for any misbehaving
application that locks input and it has no side effects. I see it as an useful
addition to the default configuration regardless of bzflag being fine now. I
believe it should be considered, but I can live without that. :)

Comment 4 Nils Philippsen 2007-11-08 12:41:40 UTC

(In reply to comment #3)

> Anyway, the xorg fix proposed would work as a workaround for any misbehaving
> application that locks input and it has no side effects. I see it as an useful
> addition to the default configuration regardless of bzflag being fine now. I
> believe it should be considered, but I can live without that. :)

The problem is that AllowDeactivateGrabs and AllowClosedownGrabs are potentially
harmful. You and I may know what we do if we activate these, but your uncle and
my aunt surely don't (I can vouch for my aunt here). Bearing that in mind, I
don't see how you could convince the Xorg maintainers to enable this as default.