X2Go Bug report logs - #276
add sudo rule to keep QT_GRAPHICSSYSTEM as env var

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Date: Tue, 30 Jul 2013 00:25:03 +0200
From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: Pascal d'Hermilly <pascal@dhermilly.dk>, 276@bugs.x2go.org
Cc: control@bugs.x2go.org
Subject: Re: [X2Go-Dev] Bug#276: qt/kde applications does not work as root.
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reassign #276 x2goserver
found #276 4.0.1.6
thanks

Hi Pascal,

reassigning this bug report to X2Go Server, not X2Go Client.

On Mo 29 Jul 2013 15:30:03 CEST Pascal d'Hermilly wrote:

> When I start qt/kde applications on the x2go server via the  
> x2goclient, I get a grey application and a lot of error messages in  
> the konsole. A workaround seems to be to change the graphicssystem  
> to native instead of raster. However raster is the default in  
> Kubuntu and it doesnt work when running things as root or through  
> sudo.
>
> administrator@desktops-x2go:~$ sudo dolphin --graphicssystem raster
> X Error: BadDrawable (invalid Pixmap or Window parameter) 9
>   Major opcode: 62 (X_CopyArea)
>   Resource id:  0x420007d
> X Error: BadDrawable (invalid Pixmap or Window parameter) 9
>   Major opcode: 62 (X_CopyArea)
>   Resource id:  0x420007d
> X Error: BadDrawable (invalid Pixmap or Window parameter) 9
>   Major opcode: 62 (X_CopyArea)
>   Resource id:  0x420007d
> X Error: BadDrawable (invalid Pixmap or Window parameter) 9
>   Major opcode: 62 (X_CopyArea)
>   Resource id:  0x420007d
> X Error: BadPixmap (invalid Pixmap parameter) 4
>   Major opcode: 54 (X_FreePixmap)
>   Resource id:  0x420007d
> X Error: BadShmSeg (invalid shared segment parameter) 128
>   Extension:    129 (MIT-SHM)
>   Minor opcode: 2 (X_ShmDetach)
>   Resource id:  0x420007c
> administrator@desktops-x2go:~$ sudo dolphin --graphicssystem native
>
> this works fine. Also gtk applications such as gimp works fine as root.
>
> This is quite a problem when you want to add/remove users and do  
> other administrative things in KDE.
>

In x2goruncommand (the server-side script that is responsible for any  
application startup) sets this env var:

"""
# disable rastering in >= KDE4.8 and Qt4.8
export QT_GRAPHICSSYSTEM=native
"""

That piece of info probably gets lost during the sudo call you perform.

Maybe you want to play with /etc/sudoers...

""" special line in sudo
%admins ALL=(ALL) SETENV: /usr/bin/dolphin
"""

And then: sudo dolphin

Does that work?
Mike

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