[REGRESSION] No tray icon; permanent dialogue box

[protist]

I've been using DavMail successfully for several years on a Linux desktop. In DavMail 6.6.0, the tray icon is no longer visible. However, when I launch DavMail, I get the following dialogue box appearing.

I don't entirely understand what it means, but if I close the window, DavMail quits. Hence I have to have it open all the time. Both changes are new to me in DavMail 6.6.0. Here is the top of my config, which is unchanged since the last version of DavMail.

davmail.server=false
davmail.mode=O365Interactive
davmail.url=https://outlook.office365.com/EWS/Exchange.asmx

I also enabled log4j.logger.davmail=DEBUG, but can't see anything weird in the logs

$ journalctl --user -u davmail@foo.service
Apr 26 10:06:29 protist systemd[797]: Started DavMail for foo.
Apr 26 10:06:29 protist davmail[2830712]: Using system provided JRE
Apr 26 10:06:29 protist davmail[2830739]: openjdk version "26.0.1" 2026-04-21
Apr 26 10:06:29 protist davmail[2830739]: OpenJDK Runtime Environment (build 26.0.1)
Apr 26 10:06:29 protist davmail[2830739]: OpenJDK 64-Bit Server VM (build 26.0.1, mixed mode, sharing)
Apr 26 10:06:29 protist davmail[2830712]: 2026-04-26 10:06:29,936 DEBUG [main] davmail.DavGateway  - Start DavMail in GUI mode
Apr 26 10:06:30 protist davmail[2830712]: 2026-04-26 10:06:30,013 DEBUG [main] davmail  - OS Name: Linux Java version: 26.0.1 64 System tray supported Current Desktop: KDE
Apr 26 10:06:30 protist davmail[2830712]: 2026-04-26 10:06:30,051 INFO  [main] davmail  - DavMail Gateway 6.6.0-4011 listening on SMTP port 1025 CALDAV port 53923 LDAP port 1389
Apr 26 10:06:30 protist davmail[2830712]: 2026-04-26 10:06:30,149 DEBUG [CheckRelease] davmail.http.HttpClientAdapter  - GET https://davmail.sourceforge.net/version.txt
Apr 26 10:06:30 protist davmail[2830712]: 2026-04-26 10:06:30,173 DEBUG [CheckRelease] davmail.http.DavGatewaySSLSocketFactory  - createSocket davmail.sourceforge.net 443
Apr 26 10:06:30 protist davmail[2830712]: 2026-04-26 10:06:30,767 DEBUG [CheckRelease] davmail.DavGateway  - DavMail released version: 6.6.0-4011

Arch Linux, up to date
KDE Plasma 6.6.4 (Wayland)

[esabol]

Try adding davmail.enableTray=true to your davmail.properties file, @protist.

[protist]

Try adding davmail.enableTray=true to your davmail.properties file, @protist.

Thank you! This fixes both problems. I now have no dialogue box, and the tray icon is back. DavMail is entirely functional too.

However, I can't seem to access the settings from the tray icon. If I left- or right-click, the icon "squishes", but there is no menu. I'm fairly sure I could access the menu in the past.

[esabol]

Make sure you follow all of the Linux instructions at https://github.com/mguessan/davmail/blob/master/src/site/xdoc/linuxsetup.xml. You might need to install the latest SWT and/or JFX .jar files.

There is an odd message there about how the improved tray icon is incompatible with O365Interactive. I don't know why it says that.

[protist]

Thanks @esabol . I had a read through. I already had installed the latest swt 4.38, and the latest jdk-openjdk 26.0.1.u8.

Just to double check, I downgraded DavMail to the previous 6.5.1. I tested clicking on the tray icon, and it brings up this window, which I think is a Wayland thing

However, after accepting it, I can click normally on the tray icon and bring up the settings. FWIW I also compared logs (at WARNING level), and the older DavMail 6.5.1 shows

Apr 26 11:20:27 protist davmail[49427]: WARNING: A restricted method in java.lang.System has been called
Apr 26 11:20:27 protist davmail[49427]: WARNING: java.lang.System::loadLibrary has been called by org.eclipse.swt.internal.Library in an unnamed module (file:/usr/share/java/swt-4.38.jar)
Apr 26 11:20:27 protist davmail[49427]: WARNING: Use --enable-native-access=ALL-UNNAMED to avoid a warning for callers in this module
Apr 26 11:20:27 protist davmail[49427]: WARNING: Restricted methods will be blocked in a future release unless native access is enabled

I then re-upgraded to the current DavMail 6.6.0, and can confirm that the bug still persists.

[mguessan]

Tray icon support on Linux is shaky, so it's now disabled by default.

See #428 for more details

Not sure about your specific case though, you probably want to test with / without SWT

[protist]

Thanks @mguessan, it's interesting here though that the tray did used to work fine, but now it's not so good. If it's helpful I'm happy to do a git-bisect and work out where the regression might have been. Or if you have any suggestions, I can just test the potential commit directly.

[esabol]

If you want to help track it down, there are 8 tray-related commits in the past year:

https://github.com/search?q=repo%3Amguessan%2Fdavmail+tray&type=commits

My guess (and this is a complete guess!) is that it's the changes to SettingsFrame.java here:

0ae0fd4#diff-3ba2c063546322a737563a151425bbb1727a793b05c24eeba37d4ecbbc7ddbdd

Various Linux folks reported that DavMail wasn't working as a tray icon, which led to changes to the code to mitigate those issues. Happy bug hunting! 😄

[mguessan]

@protist first step is to find the difference in dependencies: grab the platform independent zip package of both versions, then try with / without swt in lib directory.

From previous testing the "tray icon appears but stuck" happens with AWT tray, not SWT tray under KDE plasma.

For the record I confirmed latest davmail version working with SWT on KDE Plasma 6.5.2, however it's not working at all under Plasma 6.6.4

Also working on the same machine under gnome with appindicator extension.

Everything points to xembedsniproxy not working properly on recent Plasma versions

[protist]

I had some time, so tried to git bisect. The precompiled version at http://downloads.sourceforge.net/davmail/davmail-6.7.0-4068.zip is broken for me, but when I download from git, build from source, and installed, the tray icon works fine!

I'm not sure if that is enough information that I shouldn't bother, but @mguessan I'm not entirely sure what you mean.

grab the platform independent zip package of both versions

I can see the link on the Github page to

• https://ci.appveyor.com/api/projects/mguessan/davmail/artifacts/dist%2Fdavmail-6.7.0-trunk.zip?job=Environment%3A%20JAVA_HOME%3DC%3A%5CProgram%20Files%5CJava%5Cjdk1.8.0

But not earlier version. Swapping out the version number in the URL doesn't work.

with AWT tray

I think I'm only using SWT, but not entirely sure.

EDIT
Also, the "working" tray icon is about double the size of the "broken" tray icon 🤷

[mguessan]

Previous DavMail releases are available on Sourceforge, trunk builds provided by Appveyor have a short TTL.

I discovered a weird behavior on a Fedora VM: tray icon context is working after a reboot but quickly fails later:

Care to share your "working" binary somewhere ?

Possibly relevant patch on xembedsniproxy:
https://invent.kde.org/plasma/plasma-workspace/-/commit/b0f3f954021280bfe21d4f36bec0279620c860cd

Ticket:
https://bugs.kde.org/show_bug.cgi?id=490666

[protist]

Thanks @mguessan

I made the entire package in Arch and uploaded it here, including binary
https://gist.github.com/protist/bf82c270c70711185ee199ada82c2f4b

EDIT: FWIW when I build myself, while the tray icon does work, I can't authenticate

$ davmail foo.properties -token
Using system provided JRE
openjdk version "26.0.1" 2026-04-21
OpenJDK Runtime Environment (build 26.0.1)
OpenJDK 64-Bit Server VM (build 26.0.1, mixed mode, sharing)
java.lang.ClassNotFoundException: davmail.exchange.auth.O365InteractiveAuthenticator davmail.exchange.auth.O365InteractiveAuthenticator

I tried installing java-openjfx-bin, and specifying some paths, but couldn't get it working so gave up. FWIW if we can get the other version working anyway, this is moot.

[mguessan]

OK didn't notice any change with you build on latest Fedora: same behavior context menu working on first try then fails until I reopen a new KDE Plasma session.

Let's see what happens when they merge xembedproxy updates.