Package: xvfb Version: 2:1.4.2-2 Severity: important I run tests of a project that needs an X server on a nightly basis. For years I've been running them off-screen using Xvfb. I start an instance:
Xvfb :52 -screen 0 1024x768x24 -fbdir /tmp/xvfb.52 -ac and then run tests with "DISPLAY=:52". Recently I updated my debian testing system and the server has started crashing regularly after a few hundred tests have run. I tried building the version of the code being tested to a time before this problem started but it didn't help. Unfortunately I've been unable to reproduce the crash except by running all the tests (and eventually one crashes Xvfb but which one is not repeatable). However, I've localized the problem somewhat. The Xvfb process reports a bunch of these messages (about 1 per test): ---------------------------------------------------------------------- FreeFontPath: FPE "/usr/share/fonts/X11/misc" refcount is 2, should be 1; fixing. ---------------------------------------------------------------------- Later it reports a few messages of this form: ---------------------------------------------------------------------- [config/hal] couldn't initialise context: org.freedesktop.DBus.Error.LimitsExceeded (Connection ":1.20" is not allowed to add more match rules (increase limits in configuration file if required)) ---------------------------------------------------------------------- and then crashes. If I stop the dbus daemon (/etc/init.d/dbus stop) the crash does not occur. I found some discussion about this error here: http://www.nabble.com/org.freedesktop.DBus.Error.LimitsExceeded-td17000158.html but didn't see much about fixing it. I used "apt-get source" for dbus and hal to build them with debug symbols and install them into my home directory. Using LD_LIBRARY_PATH I ran the system's Xvfb installation with my own dbus and hal libraries. Of course it stopped crashing. Then I discovered that if I use --localstatedir=/var when building dbus it crashes again. I'm pretty sure that's because it needs to see the file /var/run/dbus/system_bus_socket Running with debug builds of the dbus and hal libraries let me get a partial backtrace for the segfault: Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x2b8f43d80610 (LWP 1266)] 0x0000000000000020 in ?? () (gdb) where #0 0x0000000000000020 in ?? () #1 0x00002b8f428a8014 in filter_func (connection=0xb9abe0, message=0xb9b060, user_data=0xd2d2b0) at libhal.c:1190 #2 0x00002b8f42ac348b in dbus_connection_dispatch (connection=0xb9abe0) at dbus-connection.c:4385 #3 0x00002b8f42ac3843 in _dbus_connection_read_write_dispatch (connection=0xb9abe0, timeout_milliseconds=0, dispatch=<value optimized out>) at dbus-connection.c:3414 #4 0x00000000004bb0ab in ?? () The line "libhal.c:1190" is inside this a condition and loop: if (dbus_message_is_signal (message, "org.freedesktop.Hal.Device", "PropertyModified")) if (ctx->device_property_modified != NULL) { ... for (i = 0; i < num_modifications; i++) { ... ctx->device_property_modified (ctx, // line 1190 object_path, key, removed, added); It looks like the device_property_modified pointer-to-function is bad. Please let me know if you need more information. FYI, I originally posted the problem to debian-user asking to what package I should report this bug: http://lists.debian.org/debian-user/2008/07/msg02915.html but I have not heard back for a week so I'm guessing xvfb. -- System Information: Debian Release: lenny/sid APT prefers testing APT policy: (989, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 2.6.22-2-amd64 (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages xvfb depends on: ii libc6 2.7-10 GNU C Library: Shared libraries ii libdbus-1-3 1.2.1-2 simple interprocess messaging syst ii libfontenc1 1:1.0.4-3 X11 font encoding library ii libhal1 0.5.11-2 Hardware Abstraction Layer - share ii libpixman-1-0 0.10.0-2 pixel-manipulation library for X a ii libxau6 1:1.0.3-3 X11 authorisation library ii libxdmcp6 1:1.0.2-3 X11 Display Manager Control Protoc ii libxfont1 1:1.3.3-1 X11 font rasterisation library ii x11-common 1:7.3+14 X Window System (X.Org) infrastruc Versions of packages xvfb recommends: ii xbase-clients 1:7.3+14 miscellaneous X clients - metapack ii xfonts-base 1:1.0.0-5 standard fonts for X xvfb suggests no packages. -- no debconf information -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
