I found a clue to change the session type of Gnome.. :
I edited the file /etc/gdm/custom.conf ,
end uncommented the row :
#WaylandEnable=false
...
After I made it, (now) I get
*Type=x11 *(as output of loginctl show session 2 -p Type,)
but
as well this , the output that I get running the .sh script is the same..
-------------------
root@localhost Downloads]# ./netbeans-8.2-linux.sh
Configuring the installer...
Searching for JVM on the system...
Extracting installation data...
Running the installer wizard...
Can`t initialize UI
Running in headless mode
Exception: java.awt.HeadlessException thrown from the
UncaughtExceptionHandler in thread "main"
-------------------
now need to find another way .....
On Sat, Apr 21, 2018 at 11:20 AM, Angelo Moreschini <
mrangelo.fedora(a)gmail.com> wrote:
hi,
with java is OK .
I downloaded all together (jdk and NetBeans) from the Oracle site... :
----------
[angelo_dev@localhost ~]$
*java -version*
*openjdk version "1.8.0_31"OpenJDK Runtime Environment (build
1.8.0_31-b13)OpenJDK 64-Bit Server VM (build 25.31-b07, mixed mode)*
[angelo_dev@localhost ~]$ *javac -version*
*javac 1.8.0_31*
----------
After I posted the previous message I learned more ,
and now I am about sure that the problem come from the graphic
environment of Linux...
After I Installed Fedora 27 I got to use a Wayland session of gnome,
instead the usual X11 session :
if I do :
*loginctl show session 2 -p Type,*
I get
*Type=wayland*
instead that
*Type=x11* (that is the value I get on computer where is Fedora 21)
Wyland is not good environment for running the graphical program that is
used to install netBeans... (the .sh script)
So I am looking now how I can return to session X11 inside Gnome...
On Sat, Apr 21, 2018 at 12:19 AM, Samuel Sieb <samuel(a)sieb.net> wrote:
> On 04/20/2018 06:22 AM, Angelo Moreschini wrote:
>
>> [root@localhost Downloads]#*./netbeans-8.2-linux.sh <
>>
http://netbeans-8.2-linux.sh>*
>> Configuring the installer...
>> Searching for JVM on the system...
>> Extracting installation data...
>> *Running the installer wizard...*
>> *Can`t initialize UI
>> Running in headless mode*
>>
>> *Exception: java.awt.HeadlessException thrown from the
>> UncaughtExceptionHandler in thread "main"*
>> --------------------
>> This is a problem about the java environment ?
>> it can be also a problem with the graphical environment of fedora ... (?)
>>
>
> An application running as root can't access the display when using
> Wayland.
>
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