lxqt doesn't read the correct settings for multiple XDG_CONFIG_DIRS

[gilir]

lxqt always read the settings from /etc/xdg/lxqt, even if others directories are set on XDG_CONFIG_DIRS

For example, on Lubuntu, we have :
XDG_CONFIG_DIRS=/etc/xdg/lubuntu:/etc/xdg/xdg-QLubuntu:/etc/xdg
Custom settings on /etc/xdg/lubuntu/lxqt
lxqt default settings on /etc/xdg/lxqt

On a fresh start, the settings on /etc/xdg/lxqt are set, instead of /etc/xdg/lubuntu/lxqt

One weird note, pcmanfm-qt works, but we have :
XDG_CONFIG_DIRS=/etc/xdg/lubuntu:/etc/xdg/xdg-QLubuntu:/etc/xdg
Custom settings on /etc/xdg/lubuntu/pcmanfm-qt
No default settings on /etc/xdg/pcmanfm-qt

Maybe it's the last directory (with a content) on XDG_CONFIG_DIRS which is set, instead of the first one ?

[gilir]

Just to mention that I use lxsession, not lxqt-session. However, I think it's the applications themself (or qtxdg, or xdg directories management by qt) which doesn't pick the good directory, the problem seems to be deeper. The session manager does its job by setting correctly the env variable.

[jleclanche]

@gilir why use lxsession at this point?

[gilir]

Why not ? And unless lxqt-session is responsable for loading the settings for all the lxqt components, it's not really the point.
A few more testing :

• Removing lxqt-common (and so /etc/xdg/lxqt), lxqt fail to fallback to /etc/xdg/lubuntu/lxqt
• Running use-qtxdg (the example in libqtxdg source code) with XdgDirs::configDir() list the correct 3 entries in XDG_CONFIG_DIR, in the right order

[gilir]

FYI, it fails with both lxqt-session and lxsession

[gilir]

The problem is in liblxqt. It uses QSettings which doesn't use values in XDG_CONFIG_DIR. See the QSettings documentation : http://qt-project.org/doc/qt-5/qsettings.html#locations-where-application-settings-are-stored . Only /etc/xdg is used, and in lxqtsettings.cpp, XdgDirs::configDirs is never used.

I see 2 solutions :

• Do another implementtaion of QSettings which use XdgDirs::configDirs
• Iterate in XdgDirs::configDirs and call QSettings when the first settings file is found.

[gilir]

See also this qt bug : https://bugreports.qt.io/browse/QTBUG-34919

[gilir]

To add more information on this, according to : https://github.com/NixOS/nixpkgs/pull/7525/files, QSettings itself has the problem, and the patch "fix" it.

[palinek]

Have a look on the lxde/liblxqt#104 ...

[palinek]

The Qt patches bringing correct support for XDG_CONFIG_DIRS to QSettings were merged (qt/qtbase@ee35fbb, qt/qtbase@4758555).

So I'd like to close this. Does anyone insist to leave this issue open?

[paulolieuthier]

Let's close it.