X2Go Bug report logs - #1200
Double clicks not recognized in Qt(4?/5?) applications

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From: Bruno CAPELETO <bruno.capeleto@abcreseau.com>
Date: Mon, 4 Sep 2017 17:44:48 +0200
Message-ID: <CABa3fk5qReW5skVWqahTTmYyyNy-hN8Op1qU4n15zO2jJz9YeQ@mail.gmail.com>
Subject: Re: [X2Go-Dev] Bug#1200: Environment variables not set
To: Bruno CAPELETO <bruno.capeleto@abcreseau.com>, 1200@bugs.x2go.org
Cc: Mihai Moldovan <ionic@ionic.de>
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[Message part 1 (text/plain, inline)]

People in Laurux's forum have reported this software works in single app
mode but on an Ubuntu server.

So it looks like this crash issue is related to the non-proper setting of
the locale on Debian server...


2017-08-16 11:17 GMT+02:00 Bruno CAPELETO <bruno.capeleto@abcreseau.com>:

>
> 2017-08-11 5:29 GMT+02:00 Mihai Moldovan <ionic@ionic.de>:
>
>> Control: reassign -1 x2goserver 4.0.1.20
>>
>> First of all, x2goserver 4.0.1.20 actually is the correct stable release.
>> 4.1.0.0 are the current nightly releases.
>>
>> I personally don't care much about what version is tested, but knowing
>> whether
>> there's a difference in behavior between the stable and nightly versions
>> is
>> certainly helpful.
>>
>
> Same issues with both versions.
>
>
>>
>>
>> On 08/10/2017 12:24 PM, Bruno CAPELETO wrote:
>> > Package: <x2goserver> Version: <4.0.1.20-0x2go1+git20170412.1
>> 125+9.main.1>
>> >
>> > # uname -a Linux mtcie1 4.9.0-3-amd64 #1 SMP Debian 4.9.30-2+deb9u1
>> > (2017-06-18) x86_64 GNU/Linux
>> >
>> >
>> >
>> > The below bugs are most probably related to each other, that's why I
>> open
>> > one case for all of them.
>> >
>> > The issues are the following : I want to use the French software Laurux,
>> > which is based on Gambas interpreter, via a x2go session running on a
>> Debian
>> > 9 server running LXDE (same issues seen on an Ubuntu server, x2goserver
>> > version = 4.0.1.20-0~1125~ubuntu14.04.1)..
>> >
>> > As a prerequisite, the software is installed on the server and runs
>> well on
>> > a local session.
>> >
>> > 1. Whatever the client (Windows or Linux 4.0.3.1-4), the local
>> environment
>> > variables are not set properly and the software - which needs French
>> > localization - crashes. That could be "solved" the following way :
>> > /etc/x2go/Xsession :
>> >
>> > ... LANG=fr LC_ALL=fr_FR.UTF-8 export LANG export LC_ALL ...
>> >
>> > That seems to be a revival of older bugs, but it is definitely still
>> here.
>>
>> How exactly did you set the locale?
>>
>> The "Debian way" would be to run dpkg-reconfigure locales as root and
>> select the
>> desired locale(s) to generate and then select the default one.
>>
>
> That is exactly the way  I set the locales.
>
>>
>> /etc/environment should not contain any locale settings.
>>
>
> /etc/environmnent is empty
>
>
>>
>> LANGUAGES and especially LC_ALL should normally not be set. LANGUAGES is a
>> GNU-only list of fallback locales. LANG is the preferred way to set the
>> locale,
>> since it's being used if all of the LC_* env variables are empty.
>> "dpkg-reconfigure locales" will do the right thing™.
>>
>
> I confirm $LANGUAGES and $LC_ALL are not set on a local session.
>
>
>>
>>
>> > 2. At the start of a new session, one gets a windows with an error
>> message
>> > "No session for pid ..." ; that bug has already been reported several
>> times
>> > in x2go bug tracking and marked as solved. Actually it is not on my
>> brand new
>> > system.
>>
>> What session are you starting exactly? I cannot find the string "No
>> session for
>> pid" in x2goserver's source code. Not sure what to do with this.
>>
>
> I found out it is a reported bug related to LXDE : cf
> https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864402
>
>
>>
>>
>> > 3. The single application mode does not work with some of the
>> applications,
>> > including that Laurux / Gambas. For example it works with
>> /usr/bin/leafpad,
>> > but /usr/bin/libreoffice makes the x2go session crash.
>>
>> That's certainly possible. The most likely cause, as Uli explained, is
>> that the
>> command daemonizes itself right after launching it. This leads to the X2Go
>> scripts assuming that the program exited and subsequently also
>> terminating the
>> session. We've seen such behavior every now and then and worked around it.
>>
>> However, it looks like x2goagent is crashing when you start libreoffice
>> in your
>> case. That shouldn't happen. My gut feeling is that this might be another
>> GTK3
>> incompatibility.
>>
>> I could try to reproduce this in a clean stretch VM.
>>
>
> Perfectly reproducible in my case on 2 installations.
>
>
>>
>>
>> > 4. The mouse double clic does not work in a x2go session, but only -
>> within
>> > the Gambas software (works well for example when launching an
>> application)
>> > and only - when the x2go client is running in a Windows environment (no
>> > problem when client in a Linux environment)
>>
>> That sounds like Gambas is doing something funny, though. As far as I was
>> able
>> to gather, Gambas seems to be using Qt5 as its drawing toolkit.
>>
>> The package qtbase5-examples should contain a binary at
>> /usr/lib/x86_64-linux-gnu/qt5/examples/widgets/widgets/mouse
>> buttons/mousebuttons
>> which spits out received mouse events.
>>
>> Can you try that - especially with double clicking - and see what it
>> outputs?
>>
>
> $ /usr/lib/x86_64-linux-gnu/qt5/examples/widgets/widgets/
> mousebuttons/mousebuttons
> failed to get the current screen resources
> QXcbConnection: XCB error: 172 (Unknown), sequence: 169, resource id: 175,
> major code: 149 (Unknown), minor code: 20
> "Mouse Press: raw button=1  Qt=LeftButton\n heldbuttons LeftButton "
> "Mouse Release: raw button=1  Qt=LeftButton\n heldbuttons NoButton"
> "Mouse DoubleClick: raw button=1  Qt=LeftButton\n heldbuttonsLeftButton "
> "Mouse Release: raw button=1  Qt=LeftButton\n heldbuttons NoButton"
>
> Reminder : the double click works when for example I launch an application
> from the desktop shortcut.
> It is only in this gambas software that it does not work, and only when
> using x2go Windows client (works perfectly well with x2go linux client).
>
>
>>
>>
>>
>> Mihai
>>
>>
>
> _______________________________________________
> x2go-dev mailing list
> x2go-dev@lists.x2go.org
> https://lists.x2go.org/listinfo/x2go-dev
>

[Message part 2 (text/html, inline)]

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