Metacity Not Sending ConfigureNotify events

Bug #1675369 reported by Dave Richards on 2017-03-23
This bug affects 1 person
Affects Status Importance Assigned to Milestone
metacity (Ubuntu)

Bug Description

# Impact
When using seamless applications such as Rdesktop, the window manager needs to send ConfigureNotify events. This is specified in ICCCM section 4.1.5. Without it, software will hang and wait for a response.

This greatly impacts corporate and enterprise users that are trying to integrate Microsoft Windows applications using Rdesktop.

# Proposed Fix
A patch has been created here and should be merged:

Patch for 3.18 branch which was used for Xenial upload is here:

# Test Case
Use rdesktop in seamless mode:
rdesktop "%ProgramFiles%\ThinLinc\WTSTools\seamlessrdpshell.exe" -s "notepad" server_ip

This requires server with windows that is setup for remote access. Also extra software is needed:

Opening multiple seamless windows and trying to switch between them should not cause any noticeable delays / hangs.

# Regression Potential
The reporter has verified the fix, and it works. It has also been in Zesty since Mar 20th and so far nobody complained.

description: updated
Changed in metacity (Ubuntu):
status: New → Fix Released
description: updated
Revision history for this message
Brian Murray (brian-murray) wrote :

Could you write a "Test Case" section that follows the SRU procedure? From

[Test Case]

 * detailed instructions how to reproduce the bug

 * these should allow someone who is not familiar with the affected
   package to reproduce the bug and verify that the updated package fixes
   the problem.

Revision history for this message
Alberts Muktupāvels (muktupavels) wrote :

I updated test case, will that be enough or more detailed instructions are required?

description: updated
Revision history for this message
Brian Murray (brian-murray) wrote :

No, that's great thanks.

Changed in metacity (Ubuntu Xenial):
status: New → Fix Committed
tags: added: verification-needed
Revision history for this message
Brian Murray (brian-murray) wrote : Please test proposed package

Hello Dave, or anyone else affected,

Accepted metacity into xenial-proposed. The package will build now and be available at in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See for documentation on how to enable and use -proposed.Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at . Thank you in advance!

Revision history for this message
Dave Richards (drichard) wrote :

I installed this patch on Xenial and it's working. Windows running in seamless mode seem to be properly receiving ConfigureNotify events and are not deadlocking.

tags: added: verification-done
removed: verification-needed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package metacity - 1:3.18.7-0ubuntu0.3

metacity (1:3.18.7-0ubuntu0.3) xenial; urgency=medium

  * Backport upstream commit to fix send synthetic ConfigureNotify events
    when receiving ConfigureRequests (synthetic_configurenotify_events.diff,
    LP: #1675369).

 -- Dmitry Shachnev <email address hidden> Thu, 23 Mar 2017 21:14:52 +0300

Changed in metacity (Ubuntu Xenial):
status: Fix Committed → Fix Released
Revision history for this message
Steve Langasek (vorlon) wrote : Update Released

The verification of the Stable Release Update for metacity has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

Changed in metacity (Ubuntu Yakkety):
status: New → Invalid
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