Bug 21320

Summary:	Lost keyboard events after starting DBUS
Product:	xorg	Reporter:	Peter Åstrand <astrand>
Component:	Server/Input/Core	Assignee:	Peter Hutterer <peter.hutterer>
Status:	RESOLVED WORKSFORME	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	high	CC:	jeremyhu, peter.hutterer, remi
Version:	7.4 (2008.09)
Hardware:	x86 (IA32)
OS:	Linux (All)
URL:	http://thread.gmane.org/gmane.comp.freedesktop.xorg.devel/609
Whiteboard:	2011BRB_Reviewed
i915 platform:		i915 features:

Description Peter Åstrand 2009-04-21 05:17:30 UTC

As reported on http://thread.gmane.org/gmane.comp.freedesktop.xorg.devel/609, keyboard events are sometimes lost. I've been able to reproduce it on a wide range of Xservers and platforms:

TigerVNC, X.Org 1.5.3: fails
xorg-x11-server-Xvfb-1.6.1-6.fc11.x86_64: fails
xorg-x11-server-Xvfb-1.5.3-15.fc10.i386: fails
xorg-x11-server-Xvfb-1.5.2-6.fc9.x86_64: fails (many events lost)
xorg-x11-server-Xorg-1.6.0-16.fc11.x86_64: fails
xorg-x11-server-Xorg-1.5.2-6.fc9.x86_64: fails
xorg-x11-server-Xorg-1.3.0.0-47.fc8: fails

In the Xvfb case, I was simulating keypresses using XSendEvent. To reproduce:

1. Login on the console, or unset XAUTHORITY.

2. xinit -- :47

3. eval `dbus-launch --sh-syntax --exit-with-session`

4. Start typing,

It seems like the rate of lost keys is basically one per second: By typing one character per second, the problem is most easily triggered.

Using Wireshark, I've seen that all KeyPress events are actually delivered to the application. It happens with both xterm and gnome-terminal, both with bash and csh. I guess what's left is either:

1) A bug that's present in both xterm and gnome-terminal (seems unlikely)

or

2) Some kind of bug in libX11

Comment 1 Jeremy Huddleston Sequoia 2011-10-07 15:35:19 UTC

Is this still an issue with recent bits?

Comment 2 Peter Åstrand 2012-06-27 01:56:19 UTC

(In reply to comment #1)
> Is this still an issue with recent bits?

Probably not, haven't seen it for a while. Feel free to close.

Comment 3 Peter Hutterer 2012-06-27 15:28:34 UTC

thanks, closing.

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