The locking assertion failure sounds like bug 185311.
Since we're seeing a few issues with traces involving libxcb, I've
prepared a non-xcb-enabled libx11 here:
http://people.ubuntu.com/~bryce/Testing/libx11/ . (I'm not certain I
reverted all the deps correctly, so let me know if there are depend
Further research seems to indicate to me that this is a known issue with
XCB/Xlib since 2004.
http://osdir.com/ml/freedesktop.xcb/2004-03/msg1.html
"So I'm declaring Xlib/XCB usable, aside from one irritating bug that I
haven't figured out how to track down yet (some apps sometimes hang
until
Is it just me, or does this seem to occur more on xubuntu-desktop than
the gnome-desktop?? (It happens on both for me, but is *A LOT* more
frequent on the xubuntu-session for me
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dbus-launch freezes for unknown reason at session start
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** Also affects: dbus via
https://bugzilla.novell.com/show_bug.cgi?id=361180
Importance: Unknown
Status: Unknown
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dbus-launch freezes for unknown reason at session start
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Link to a similar fixed bugreport on opensuse:
https://bugzilla.novell.com/show_bug.cgi?id=361180
The problem was sidesteped, I don't know if this can be done as well here.
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** Changed in: libxcb
Status: Unknown => Confirmed
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Here is dbus-launch wrapped in strace which leads me to believe that
maybe it xcb is returning to dbus.
** Attachment added: "full dbus-launch strace"
http://launchpadlibrarian.net/15424059/dbus-launch.out
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dbus-launch freezes for unknown reason at session start
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Fwiw, there appears to be a rewrite of the socket handling, discussed
here:
http://lists.freedesktop.org/archives/xcb/2008-March/003347.html
However, in reviewing the patches they do not appear to directly relate
to _xcb_in_read_block() or its parents.
** Also affects: libxcb via
https://b
Thanks for attaching the files, I've forwarded the bug upstream at
https://bugs.freedesktop.org/show_bug.cgi?id=16420. Please subscribe to
the upstream bug, so if they have questions or suggestions, they can
reach you directly.
** Changed in: libxcb (Ubuntu)
Importance: Undecided => High
Please try setting this environment variable, to see if the locking logic has
an effect (this change was made in Hardy on March 11th):
export LIBXCB_DISABLE_SLOPPY_LOCK=1
** Changed in: libxcb (Ubuntu)
Status: New => Incomplete
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dbus-launch freezes for unknown reason at session star
Attached is the xfce4 xinitrc script that launches the offending dbus-
launch --sh-syntax --exit-with-session process. You'll notice that my
copy is slightly modified to include debug statement (which were
unhelpful in assisting me locate said offending process as the script
always completed as exp
Here is a copy of my /var/log/Xorg.0.log - note, his bug did not occur
this uptime.
** Attachment added: "/var/log/Xorg.0.log"
http://launchpadlibrarian.net/15420742/Xorg.0.log
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dbus-launch freezes for unknown reason at session start
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The traces so far show libxcb, so it's probably not worth having a
libx11 component open on it.
** Changed in: libx11 (Ubuntu)
Status: New => Invalid
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dbus-launch freezes for unknown reason at session start
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** Also affects: libx11 (Ubuntu)
Importance: Undecided
Status: New
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Correction: In my previous comment, I meant to say gdb and not gdm. :)
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"thread apply all bt" in gdm returns nothing. However, strace outputs:
select(14, [13], NULL, NULL, NULL
and then hangs. This, I believe, means that it is waiting for activity
on fd 13.
Output of lsof follows for the process (full output of lsof attached):
COMMANDPIDUSER FD
Also note, killing the "dbus-launch --sh-syntax --exit-with-session"
with signal 9 works for me and the login process finishes.
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>From bug #232122:
Alex Riesen wrote on 2008-05-27: (permalink)
After a while testing the ssh-agent workaround I have to say that it *does not*
work.
It is harder to get the hanging, but it still happens.
The problem is still there.
** Also affects: linux (Ubuntu)
Importance: Undecided
I can confirm this bug. "dbus-launch --sh-syntax --exit-with-session "
is hanging on __kernel_vsyscall() which usually indicates the problem is
else where and could be a million different things. The select() is on
the fd that is the bidirectional link to the X server - maybe X is not
fully initial
http://ubuntuforums.org/showthread.php?s=e0e7563685c47e976781c3f846c1a6b5&p=4918094#post4918094
seems to be the same issue. The workaround (to disable ssh-agent lines
in /etc/xdg/xfce4/xinitrc) works for me too.
** Also affects: xfce4-session (Ubuntu)
Importance: Undecided
Status: New
Ok, poll does not workaround anything. It just seem make the hang
happen even more seldom, but does not eliminate the problem.
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