Won't Open As Root

[ghost]

Recently, on an Arch Fluxbox system (running lxqt-policykit-agent daemon and setting Qt theme by qt5ct if those matter) pcmanfm-qt (0.10.0) has started to fail opening as root.

Running lxsu pcmanfm-qt from the command line produces

** (process:5449): WARNING **: The directory '~/Templates' doesn't exist, ignoring it

though I've got ~/Templates.

Running lxqt-sudo pcmanfm-qt doesn't produce the above, yet it too fails to open pcmanfm-qt as root.

I can launch, for instance, qtcreator or spacefm as root without any issues.

[tsujan]

Does it also happen when you set the authentication mode to sudo in gksu-properties (belonging to libgksu)?

[ghost]

I don't have libgksu and such.

[tsujan]

I don't have libgksu and such.

Ignore it! Now I'm using my laptop with the latest LXQt and see the same problem. It's a regression because it doesn't exist with an older LXQt version on my desktop computer.

[tsujan]

The change that has caused this regression should be made in the last three months. Does anybody have a clue?

[ghost]

It has appeared here at most a month ago, or more likely 1-2 weeks ago.

[tsujan]

It has appeared here at most a month ago, or more likely 1-2 weeks ago.

Thanks! That could narrow down the search.

[tsujan]

This issue isn't in pcmanfm-qt or libfm-qt. On an LXQt from 3 months ago, I upgraded only libfm-qt and pcmanfm-qt to their latest github versions and pcmanfm-qt opened as root correctly.

Since the rest of the system is up-to-date here, another LXQt component may have caused this issue but I can't see how. @palinek, @paulolieuthier, @luis-pereira, any idea?

[tsujan]

Never mind! Found the cause: it was Arch itself!

@AcarBurak, please see if reinstallation of dbus fixes the problem! It did on both of my Manajro systems. (The above-mentioned experiment was done under Debian.)

[palinek]

It may be somehow connected to some preserved environment.... back then, I needed to do following "hack" -> lxqt/lxqt-sudo@dd8903d for pcmanfm-qt

[tsujan]

@palinek, thanks for your reply!
It happened with sudo and kdesu too. When I saw that konsole couldn't be opened as root either, I became suspicious of dbus. There has been a change in Arch's dbus that can cause such issues.

[agaida]

hmm - i don't have these problems with the latest git, so i suspect a problem outside of the code.

[tsujan]

hmm - i don't have these problems with the latest git, so i suspect a problem outside of the code.

I agree.

[ghost]

Reinstalling dbus didn't solve the issue, but launching it by

lxsu dbus-launch pcmanfm-qt

solves.

[stefonarch]

Here on arch pcmanfm-qt is the very only application which does not start with lxsudo (or kdesu), other qt filemanager like qtfm do. Sure this is not in the code?

[tsujan]

Sure this is not in the code?

On Manjaro (whose packages are mostly those of Arch), I have no problem. Please consider the fact that some apps -- like pcmanfm-qt -- need dbus support to run as root!

[Myrddin-Wyllt]

dbus-x11 from the AUR is the simplest solution in Arch distros, but It's a bit behind compared to Arch's dbus (one could edit the pkgbuild during install and modernize it fairly easily). After installing dbus-x11 on Manjaro, I didn't have the issue (on Manjaro, dbus-x11 is a package with the latest version).
I believe the relevant compilation flag is --enable-x11-autolaunch. Not sure on that though.

@ghost is correct that dbus-launch solves the issue without having to alter dbus installations.

Using an alias including dbus-launch for specific applications could work, but is a bit tedious.