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[Michael Plotkin <plotkin@xxxxxxx>]

Thank you Michael, very much, but in a sense my question was
whether there is (there would be) a way to have this option -
"--disable-acceleration-check" always (by default), so my users
wouldn't need to change their existing setups of many NX client
sessions that they already have.

  Also NX has an option to start different sessions ("Desktops" as they
call it)  including Gnome or, alternatively, run any specified command.
If I specify to run "gnome-session" command - it doesn't work correctly
at all. I don't know exactly how they lunch gnome-session when I select
"GNOME Desktop" in their configuration menu (there are no sources
as you know) and I didn't spend much time yet investigating this.

Michael.

On 03/17/2015 08:16 AM, Michael DePaulo wrote:
> @plotkin it should work as long as you tell NX 3 to run the command:
> gnome-session --session=gnome-flashback --disable-acceleration-check
> (Not tested)
>
> You may have to put that line in a script, and tell NX 3  to launch that
> script. That's what you will have to do with X2Go at least.
>
> I wrote the logic in X2Go for "--session=gnome-flashback". I still need
> to write the logic in X2Go for "--disable-acceleration-check". Once I
> do, X2Go users can simply select "GNOME" as their session.
>

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-session in Ubuntu.
https://bugs.launchpad.net/bugs/1251281

Title:
  gnome-session-flashback/Unity fails to start without hardware
  acceleration in cloud/remote environments
  (Forwarded-X/XRDP/VNC/NX/X2GO/Chromoting)

Status in The GNOME 2 Session Manager:
  Fix Released
Status in gnome-session package in Ubuntu:
  Triaged
Status in gnome-session source package in Trusty:
  New
Status in gnome-session source package in Utopic:
  New
Status in gnome-session source package in Vivid:
  Triaged
Status in gnome-session package in Debian:
  New

Bug description:
  This bug will cause static grey or black screen instead of openning
  remote session using Forwarded-X/XRDP/VNC/NX/X2GO/Chromoting from
  x2goclient, rdpclient(reminna/vinagre/mstsc), SSH, VNC, NOMACHINE and
  etc.

  1) lsb_release -rd
  Description:	Ubuntu 14.04 LTS
  Release:	14.04

  2) apt-cache policy gnome-session
  gnome-session:
    Installed: 3.9.90-0ubuntu12
    Candidate: 3.9.90-0ubuntu12
    Version table:
   *** 3.9.90-0ubuntu12 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  apt-cache policy gnome-session-fallback
  gnome-session-fallback:
    Installed: 1:3.8.0-1ubuntu12.1
    Candidate: 1:3.8.0-1ubuntu12.1
    Version table:
   *** 1:3.8.0-1ubuntu12.1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/universe amd64 Packages
          100 /var/lib/dpkg/status
       1:3.8.0-1ubuntu11 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages

  apt-cache policy xrdp
  xrdp:
    Installed: 0.6.0-1
    Candidate: 0.6.0-1
    Version table:
   *** 0.6.0-1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
          100 /var/lib/dpkg/status

  apt-cache policy remmina
  remmina:
    Installed: 1.0.0-4ubuntu3
    Candidate: 1.0.0-4ubuntu3
    Version table:
   *** 1.0.0-4ubuntu3 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  apt-cache policy vinagre
  vinagre:
    Installed: 3.10.2-0ubuntu1
    Candidate: 3.10.2-0ubuntu1
    Version table:
   *** 3.10.2-0ubuntu1 0
          500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
          100 /var/lib/dpkg/status

  3) What is expected to happen is when one installs xrdp on the host
  and attempts to use remmina or vinagre on a Ubuntu 14.04 client to RDP
  in, it works.

  4) What happens instead is it shows a gray static screen as per attached screenshot. This would appear an issue with gnome-session as per client log:
  cat .xsession-errors.old
  Script for ibus started at run_im.
  Script for auto started at run_im.
  Script for default started at run_im.
  init: indicator-application main process ended, respawning
  init: indicator-application main process ended, respawning
  init: indicator-application respawning too fast, stopped
  Xsession: X session started for  at Sun Jul 20 15:25:59 CDT 2014
  X Error of failed request:  BadValue (integer parameter out of range for operation)
    Major opcode of failed request:  109 (X_ChangeHosts)
    Value in failed request:  0x5
    Serial number of failed request:  6
    Current serial number in output stream:  8
  localuser:moniker being added to access control list
  X Error of failed request:  BadValue (integer parameter out of range for operation)
    Major opcode of failed request:  109 (X_ChangeHosts)
    Value in failed request:  0x5
    Serial number of failed request:  6
    Current serial number in output stream:  8
  Script for ibus started at run_im.
  Script for auto started at run_im.
  Script for default started at run_im.
  Script for ibus started at run_im.
  Script for auto started at run_im.
  Script for default started at run_im.
  gnome-session-is-accelerated: No composite extension.
  gnome-session-check-accelerated: Helper exited with code 256
  gnome-session-is-accelerated: No composite extension.
  gnome-session-check-accelerated: Helper exited with code 256

  ** (process:2565): WARNING **: software acceleration check failed:
  Child process exited with code 1

  ** (x-session-manager:2565): CRITICAL **: We failed, but the fail
  whale is dead. Sorry....

  The following is not a WORKAROUND, create /etc/xorg.conf :
  Section "Device"
     Identifier  "Intel Graphics"
     Driver      "Intel"
     Option      "DRI" "False"
  EndSection

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: gnome-session 3.9.90-0ubuntu12
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun Jul 20 15:35:23 2014
  InstallationDate: Installed on 2014-06-22 (28 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
  PackageArchitecture: all
  SourcePackage: gnome-session
  UpgradeStatus: No upgrade log present (probably fresh install)

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