Bug 86158 - ignoring keyboard and mouse inputs
Summary: ignoring keyboard and mouse inputs
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: vnc
Version: 4.4
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Adam Tkac
QA Contact: David Lawrence
Depends On:
TreeView+ depends on / blocked
Reported: 2003-03-15 02:07 UTC by Aaron Straus
Modified: 2013-04-30 23:33 UTC (History)
1 user (show)

Fixed In Version: RHBA-2008-0685
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2008-07-24 19:35:50 UTC
Target Upstream Version:

Attachments (Terms of Use)
vnc log after server goes into yuck mode (28.65 KB, text/plain)
2003-03-18 14:37 UTC, Aaron Straus
no flags Details
Proposed patch (2.46 KB, patch)
2007-07-04 09:35 UTC, Adam Tkac
no flags Details | Diff

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2008:0685 0 normal SHIPPED_LIVE vnc bug fix update 2008-07-23 15:48:46 UTC

Description Aaron Straus 2003-03-15 02:07:30 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (compatible; Konqueror/3.1; Linux)

Description of problem:
the vnc server suddenly starts ignoring all mouse/keyboard inputs.  this has happened across multiple machines (all running RH8) and with many different vnc clients.  after reconnecting it continues to ignore inputs.  it happens when 1 or more clients are connected, but we haven't seen it without a client connected.   it also only seems to happen when a client is actually active i.e somebody is moving the mouse or typing.

we also run RH 7.3/7.1 and have not seen this bug.

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

How reproducible:

Steps to Reproduce:

Additional info:

Comment 1 Tim Waugh 2003-03-18 13:29:27 UTC
Please attach the log file that the server creates (in ~/.vnc).

Comment 2 Aaron Straus 2003-03-18 14:37:48 UTC
Created attachment 90640 [details]
vnc log after server goes into yuck mode

here is the log after the server goes into the no-input mode.

Comment 3 Aaron Straus 2003-09-03 14:46:37 UTC
We've noticed we can recover the session by killing the application in the 
foreground.   As soon as that application is dead, mouse/kbd input is accepted 
Also seen in RH9 on a completely up2date machine.  Killing the application in 
the foreground (evolution) seemed to bring everything back again.  

Comment 4 Aaron Straus 2005-03-02 18:36:33 UTC
Well here's an update.

We switched to KDE on our Redhat 8 box and never had it happen again (only in

However, recently we did have exactly the same symptoms occur on a RHEL3 WS U4
completely up2date box running KDE, so I guess this bug is still around :(?

Comment 5 Tim Waugh 2005-03-07 17:17:27 UTC
The recent 4.1 release of VNC has some changes to
xc/programs/Xserver/vnc/XserverDesktop.cc which look like they might be aimed at
this problem: specifically, the addition of a XserverDesktop::deferUpdate function.

Comment 6 Adam Tkac 2006-10-27 13:01:43 UTC
Please, test if this problem is in latest release of vnc

Comment 7 Aaron Straus 2006-10-27 13:51:21 UTC
Hi.  We've seen it with the latest release of VNC on RHEL 4 WS i386 (running KDE
in the VNC).  It happens pretty infrequently now (once every six months or so).  

Comment 8 Aaron Straus 2006-11-14 16:08:15 UTC
It happened twice in the last two weeks, so I'd like to re-open the bug.

Comment 9 Radek Vokál 2006-11-29 14:20:19 UTC
Comment #7 confuses me. Is this bug still for RHEL3 or RHEL4? 

Comment 10 Aaron Straus 2006-11-29 14:33:28 UTC
We upgraded to RHEL4 from RHEL3 and continue to see the bug.  We've seen it in
every release since good old RH8.

Comment 11 Adam Tkac 2007-03-28 18:07:06 UTC
(In reply to comment #7)
Moving to RHEL 4

Comment 12 Adam Tkac 2007-03-28 19:53:18 UTC
I've tried backport patch for this issue to rhel4. Could you please test
proposed update package and tell me your impressions?

Regards, Adam

Comment 13 Aaron Straus 2007-03-29 00:07:58 UTC
I'll take a look, but unfortunately we mostly see this bug in production where I
can't easily update the VNC.  I'll give it a try on a non-production box though.

Comment 17 Adam Tkac 2007-07-04 09:35:03 UTC
Created attachment 158509 [details]
Proposed patch

Comment 19 RHEL Program Management 2007-11-29 04:27:26 UTC
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update

Comment 23 errata-xmlrpc 2008-07-24 19:35:50 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.


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