X2Go Bug report logs - #724
Scanning does not work over romote-desktop session with sane

version graph

Package: x2goserver-xsession; Maintainer for x2goserver-xsession is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goserver-xsession is src:x2goserver.

Reported by: Andreas Glaeser <bugs.andreas.glaeser@freenet.de>

Date: Thu, 8 Jan 2015 08:25:01 UTC

Severity: wishlist

Tags: not-a-bug, wontfix

Found in version 4.0.1.18-0x2go1+git20141006.949+wheezy.main.1

Full log

Report forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#724; Package x2goserver-xsession. (Thu, 08 Jan 2015 08:25:01 GMT) (full text, mbox, link).

Acknowledgement sent to Andreas Glaeser <bugs.andreas.glaeser@freenet.de>:
New Bug report received and forwarded. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Thu, 08 Jan 2015 08:25:02 GMT) (full text, mbox, link).

Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

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Date: Thu, 8 Jan 2015 09:04:48 +0100
From: Andreas Glaeser <bugs.andreas.glaeser@freenet.de>
To: submit@bugs.x2go.org
Subject: Scanning does not work over romote-desktop session with sane
Message-ID: <20150108090448.57aa3510@md-ho.lokal>
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Package: x2goserver-xsession 
Version: 4.0.1.18-0x2go1+git20141006.949+wheezy.main.1

simple-scan does not work over x2go-remote-desktop session.
See there: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=761398

It is most probably a problem with user-rights and and with the sane-backend.
When trying to scan, it looks like this on the terminal:

andreas@md-ho:~$ simple-scan
p11-kit: invalid config filename, will be ignored in the
future: /etc/pkcs11/modules/gnome-keyring-module

** (simple-scan:23088): WARNING **: scanner.vala:801: Unable to get open device: Access
to resource has been denied

xsane says: 'Failed to open device 'pixma:04A9172B': Access to resource has been dnied.

But scanning works, when there is a local session running on the machine (i.e. the
remote-desktop server) from the same user.

Normally this is no problem at all for thin-clients, because they do not have a scanner
connected to the desktop-server. But in my case it is a problem. I also do acknowledge
that not many people do have this problem, so it is severity 3 only.

Please let me know, if I should rather report this against the sane-backend.

There is the original report:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=774830

> Package: x2goserver-xsession             
> New: yes
> State: installed
> Automatically installed: no
> Version: 4.0.1.18-0x2go1+git20141006.949+wheezy.main.1
> Priority: optional
> Section: x11
> Maintainer: X2Go Developers <x2go-dev@lists.berlios.de>
> Architecture: all
> Uncompressed Size: 80.9 k
> Depends: x2goserver (>= 4.0.1.18-0x2go1+git20141006.949+wheezy.main.1), x2goserver (<
>          4.0.1.18-0x2go1+git20141006.949+wheezy.main.1.1~), x11-common
> Description: X2Go server daemon scripts (Xsession runner)
>  X2Go is a server based computing environment with 
>  * session resuming 
>  * low bandwidth support 
>  * session brokerage support 
>  * client-side mass storage mounting support 
>  * client-side printing support 
>  * audio support 
>  * authentication by smartcard and USB stick 
>    
>  This X2Go server add-on enables Xsession script handling when starting desktop sessions
>  with X2Go. 
>  
>  Amongst others the parsing of Xsession scripts will enable desktop-profiles, ssh-agent
>  startups, gpgagent startups and many more Xsession related features on X2Go session
>  login automagically.
> Homepage: http://code.x2go.org/releases/source/x2goserver

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Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#724; Package x2goserver-xsession. (Thu, 08 Jan 2015 14:10:01 GMT) (full text, mbox, link).

Acknowledgement sent to Stefan Baur <X2Go-ML-1@baur-itcs.de>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Thu, 08 Jan 2015 14:10:01 GMT) (full text, mbox, link).

Message #10 received at 724@bugs.x2go.org (full text, mbox, reply):

Received: (at 724) by bugs.x2go.org; 8 Jan 2015 14:06:33 +0000
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Control: tag -1 wontfix
Control: tag -1 notabug
Control: tag -1 close

Hello, Andreas.

I couldn't help but notice that you already reported this on X2Go-User
back in November of 2014.
(http://lists.x2go.org/pipermail/x2go-user/2014-November/002679.html)

So, let me quote from my reply to you that I sent back then
(http://lists.x2go.org/pipermail/x2go-user/2014-November/002680.html):

> I fail to see what this has to do with X2Go, other than you used
> X2go as a workaround for your problem. We're not Debian, we're not
> XOrg, so the bug report mentioned has nothing to do with us.

If you feel differently, please be more precise in your explanation as
to why you believe it to be an X2Go bug.

- -Stefan

- -- 
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Added tag(s) wontfix. Request was from Stefan Baur <X2Go-ML-1@baur-itcs.de> to 724-submit@bugs.x2go.org. (Thu, 08 Jan 2015 14:10:02 GMT) (full text, mbox, link).

Added tag(s) not-a-bug. Request was from Stefan Baur <X2Go-ML-1@baur-itcs.de> to control@bugs.x2go.org. (Thu, 08 Jan 2015 14:15:02 GMT) (full text, mbox, link).

Marked Bug as done Request was from Stefan Baur <X2Go-ML-1@baur-itcs.de> to control@bugs.x2go.org. (Thu, 08 Jan 2015 14:35:02 GMT) (full text, mbox, link).

Notification sent to Andreas Glaeser <bugs.andreas.glaeser@freenet.de>:
Bug acknowledged by developer. (Thu, 08 Jan 2015 14:35:02 GMT) (full text, mbox, link).

Acknowledgement sent to Mike Gabriel <mike.gabriel@das-netzwerkteam.de>:
Extra info received and filed, but not forwarded. (Thu, 08 Jan 2015 15:40:01 GMT) (full text, mbox, link).

Message #21 received at 724-quiet@bugs.x2go.org (full text, mbox, reply):

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From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: Stefan Baur <X2Go-ML-1@baur-itcs.de>, 724-quiet@bugs.x2go.org
Subject: Re: [X2Go-Dev] Bug#724: Scanning does not work over romote-desktop
 session with sane
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[Message part 1 (text/plain, inline)]
Control tag -1 not-a-bug

On  Do 08 Jan 2015 15:02:31 CET, Stefan Baur wrote:

> Control: tag -1 wontfix
> Control: tag -1 notabug
> Control: tag -1 close

Fixing the not-a-bug tag...

Mike

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Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#724; Package x2goserver-xsession. (Fri, 09 Jan 2015 08:40:02 GMT) (full text, mbox, link).

Acknowledgement sent to Andreas Glaeser <bugs.andreas.glaeser@freenet.de>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Fri, 09 Jan 2015 08:40:02 GMT) (full text, mbox, link).

Message #26 received at 724@bugs.x2go.org (full text, mbox, reply):

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Date: Fri, 9 Jan 2015 09:13:58 +0100
From: Andreas Glaeser <bugs.andreas.glaeser@freenet.de>
To: 724@bugs.x2go.org
Subject: Explanation
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The problem should be easily fixable, because it vanishes, when the same user, that has
an x2go-session running and wants to do a scanning-job over it, is logged in locally on
the server.
But if you want to tell me, it is actually a feature and not a bug, well, then you are
free to do so.
I heard already there is something upcoming like a usb-over ethernet driver. This would be
a viable workaround then.
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Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#724; Package x2goserver-xsession. (Fri, 09 Jan 2015 11:15:01 GMT) (full text, mbox, link).

Acknowledgement sent to Mike Gabriel <mike.gabriel@das-netzwerkteam.de>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Fri, 09 Jan 2015 11:15:01 GMT) (full text, mbox, link).

Message #31 received at 724@bugs.x2go.org (full text, mbox, reply):

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Date: Fri, 09 Jan 2015 11:12:22 +0000
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From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: Andreas Glaeser <bugs.andreas.glaeser@freenet.de>, 724@bugs.x2go.org
Subject: Re: [X2Go-Dev] Bug#724: Explanation
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Control: severity -1 wishlist

Hi Andreas,

On  Fr 09 Jan 2015 09:13:58 CET, Andreas Glaeser wrote:

> The problem should be easily fixable, because it vanishes, when the  
> same user, that has
> an x2go-session running and wants to do a scanning-job over it, is  
> logged in locally on
> the server.
> But if you want to tell me, it is actually a feature and not a bug,  
> well, then you are
> free to do so.
> I heard already there is something upcoming like a usb-over ethernet  
> driver. This would be
> a viable workaround then

I presume your issue caused by the way systemd or consolekit handles  
your SEAT that the X2Go Session runs in.

For USB flashdrives and CD/DVD-ROMs, for example, the SEAT properties  
hinder the devices to pop up as desktop icons once a flash drive /  
optical disk is inserted.

Maybe something similar is implemented in sane and tools around sane.

Please help debugging this issue in depth if you expect a solution for  
this issue (read the sane code and the simple-scan code and check  
where that error message gets raised). I guess, not many developers  
have a personal interest in working on this (Sorry!).

Dropping severity to "wishlist"...

Mike

PS: please also note that USB-over-IP is music of the far future  
(unless someone sponsors it financially).

-- 

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Severity set to 'wishlist' from 'normal' Request was from Mike Gabriel <mike.gabriel@das-netzwerkteam.de> to 724-submit@bugs.x2go.org. (Fri, 09 Jan 2015 11:15:02 GMT) (full text, mbox, link).

Acknowledgement sent to Stefan Baur <X2Go-ML-1@baur-itcs.de>:
Extra info received and filed, but not forwarded.

Your message did not contain a Subject field. They are recommended and useful because the title of a $gBug is determined using this field. Please remember to include a Subject field in your messages in future.

(Fri, 09 Jan 2015 13:05:02 GMT) (full text, mbox, link).

Message #36 received at 724-quiet@bugs.x2go.org (full text, mbox, reply):

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Bug reopened Request was from Stefan Baur <X2Go-ML-1@baur-itcs.de> to control@bugs.x2go.org. (Fri, 09 Jan 2015 13:10:02 GMT) (full text, mbox, link).

Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#724; Package x2goserver-xsession. (Sun, 18 Sep 2016 16:35:01 GMT) (full text, mbox, link).

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