Bug 86158 - ignoring keyboard and mouse inputs
ignoring keyboard and mouse inputs
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: vnc (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Adam Tkac
David Lawrence
: Reopened
Depends On:
  Show dependency treegraph
Reported: 2003-03-14 21:07 EST by Aaron Straus
Modified: 2013-04-30 19:33 EDT (History)
1 user (show)

See Also:
Fixed In Version: RHBA-2008-0685
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2008-07-24 15:35:50 EDT
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Regression: ---
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Documentation: ---
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
vnc log after server goes into yuck mode (28.65 KB, text/plain)
2003-03-18 09:37 EST, Aaron Straus
no flags Details
Proposed patch (2.46 KB, patch)
2007-07-04 05:35 EDT, Adam Tkac
no flags Details | Diff

  None (edit)
Description Aaron Straus 2003-03-14 21:07:30 EST
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 08:29:27 EST
Please attach the log file that the server creates (in ~/.vnc).
Comment 2 Aaron Straus 2003-03-18 09:37:48 EST
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 10:46:37 EDT
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 13:36:33 EST
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 12:17:27 EST
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 09:01:43 EDT
Please, test if this problem is in latest release of vnc
Comment 7 Aaron Straus 2006-10-27 09:51:21 EDT
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 11:08:15 EST
It happened twice in the last two weeks, so I'd like to re-open the bug.
Comment 9 Radek Vokal 2006-11-29 09:20:19 EST
Comment #7 confuses me. Is this bug still for RHEL3 or RHEL4? 
Comment 10 Aaron Straus 2006-11-29 09:33:28 EST
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 14:07:06 EDT
(In reply to comment #7)
Moving to RHEL 4

Comment 12 Adam Tkac 2007-03-28 15:53:18 EDT
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 2007-03-28 20:07:58 EDT
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 05:35:03 EDT
Created attachment 158509 [details]
Proposed patch
Comment 19 RHEL Product and Program Management 2007-11-28 23:27:26 EST
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 15:35:50 EDT
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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