since two weeks, I guess it is since I've updated syncevolution I experience problems connecting the server (see logfile).
I get a 511 error.

I'm using Debian Testing with syncevolution 1.5.3-2

Any hint is very appreciated.

Many thanks


On Mon, 2015-06-08 at 16:00 +0200, Patrick Ohly wrote:
About SyncEvolution

SyncEvolution synchronizes personal information management (PIM) data
via various protocols (SyncML, CalDAV/CardDAV, ActiveSync). It syncs
contacts, appointments, tasks and memos. It syncs to web services or to
SyncML-capable phones via Bluetooth. 

Binaries are available for Linux desktops (using GNOME Evolution, or
KDE's Akonadi), for Maemo (Nokia N900, N9) and Sailfish OS (Jolla

About 1.5.1

Maintenance release. Binaries now also get compiled for Debian 8.0


* avoid time zone issue with Funambol server

  The Funambol iCalendar 2.0 parser fails to handle time zones
  with quotation marks around the TZID value, which is something
  that SyncEvolution started to add in While it is valid
  to quote like that, it is not necessary, so avoid quoting in
  this case to restore interoperability.

* syncevo-http-server: stop using deprecated twisted.web.error (FDO #90419)

  This has become a real problem for example on Fedora 22 where the
  old name is no longer available.

* syncevo-http-server: use TLS instead of SSLv3

  This fixes a potential security risk and connection problems with clients
  that don't support SSLv3 anymore.

* syncing: avoid segfault for invalid text inside items (FDO #90118)

  As reported by Canonical, syncing fails if data items contain
  text which is not correct UTF-8 in one of the fields that
  SyncEvolution logs in the command line output (like SUMMARY of
  a calendar event).

  That is because the byte string coming from the item is passed
  unchecked to the D-Bus implementation for transmission via D-Bus. But
  D-Bus strings must be correct UTF-8, so depending on the D-Bus library
  in use, one gets a segfault (GIO D-Bus, due to an unchecked NULL
  pointer access) or an "out of memory" error (libdbus, which checks for

  SyncEvolution now replaces invalid bytes with a question mark in its
  output while preserving the rest of the text.

* file backend: log item manipulation

  Extracting a meaningful description of each item from the Synthesis
  engine when updating and adding items is easy to do for items of
  certain known types (contacts and calendar items).

* command line: preserve log prefix of target side of local sync

  In some cases, the prefix which was supposed to be embedded
  in the log messages from the target side of a local sync got
  lost on the way to the command line tool.

  Primarily this affected the added/updated/deleted messages, as in:

  [INFO remote@client] @client/addressbook: started
  [INFO remote@client] updating "Joan Doe"
  [INFO remote@client] @client/addressbook: received 1/1

* compile fix: use ${PKG_CONFIG} instead of pkg-config.

  This fixes the build on Exherbo that only has prefixed versions of

* WebDAV: handle 403 during Google OAuth authentication

  When sending an access token with insufficient scope (for example,
  because the Ubuntu Online Accounts service definition was incomplete,
  as documented in FDO #86824), Google responds with a 403 "service
  denied" error.

  This is now dealt with by retrying, just as for a transient 401 error.

* CalDAV: more efficient "is empty" check (FDO #86335)

  Since, syncing WebDAV collections always checks first
  whether there are items in the collections. This was partly done for
  slow sync prevention (which is not necessary for empty collections),
  partly for the "is the datastore usable" check.

  However, this did not take into account that for CalDAV collections,
  the entire content gets downloaded for this check. That is because
  filtering by item type (VEVENT vs. VJOURNAL) is not implemented
  correctly by all servers. So now all CalDAV syncs, whether incremental
  or slow, always transfered all items, which is not the
  intention (incremental syncs should be fast and efficient).

  This release adds a more efficient isEmpty() check: for simple CardDAV
  collections, only luid and etag get transferred, as in
  listAllItems(). This is the behavior from 1.5.

  For CalDAV, a report with a filter for the content type is used and
  the transfer gets aborted after the first item, without actually
  double-checking the content of the item. This is different from
  listAllItems(), which really transfers the content. This extra content
  check would only be needed for some old servers (Radical 0.7) and is
  not essential, because reporting "not empty" even when empty is safe.

* WebDAV: send Basic Auth via http in some cases (FDO #57248)

  It turned out that finding databases on an Apple Calendar server accessed via
  http depends on sending Basic Auth even when the server does not ask for it:
  without authentication, there is no information about the current principal,
  which is necessary for finding the user's databases.

  To make this work again, sending the authentication header is now forced for
  plain http if (and only if) the request which should have returned the
  principal URL fails to include it. This implies sending the same request
  twice, but as this scenario should be rare in practise (was only done for
  testing), this is acceptable.

* Ubuntu Online Accounts: support plain text credentials

  The backend for UOA was rewritten by Alberto Mardegan and now also
  can use plain username/password credentials stored in UOA.

* various compiler error and warning fixes

Source, Installation, Further information


Source code bundles for users are available in

and the original source is in the git repositories

i386, lpia and amd64 binaries for Debian-based distributions are
available via the "stable" syncevolution.org repository. Add the
following entry to your /etc/apt/source.list:
 stable main

The GPG key for the repository needs to be imported as root with:
  apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B2EC3981

Then install "syncevolution-evolution", "syncevolution-kde" and/or

These binaries include the "sync-ui" GTK GUI and were compiled for
Ubuntu 10.04 LTS (Lucid), except for ActiveSync binaries which were
compiled for Debian Wheezy, Ubuntu Saucy, Ubuntu Trusty an Debian
Jessie. The packages mentioned above are meta-packages which pull in
suitable packages matching the distro during installation.

Older distributions like Debian 4.0 (Etch) can no longer be supported
with precompiled binaries because of missing libraries, but the source
still compiles when not enabling the GUI (the default).

The same binaries are also available as .tar.gz and .rpm archives in
. In contrast
to 0.8.x archives, the 1.x .tar.gz archives have to be unpacked and the
content must be moved to /usr, because several files would not be found

After installation, follow the