ruediger.kupper: Acceleration check can be skipped by passing --disable-acceleration-check to gnome-session
chris-good: I might be wrong but by 3D acceleration, VM hypervizors usually mean H/W 3D offloading to host GPU. Also usually VM para-virtualized drivers support direct rendering and all most X11 extensions which can be used by Mesa (pure software or LLVM-pipe) to simulate 3D. Regarding Unity, it uses Compiz which also supports Mesa simulated 3D (at least in recent versions). Environments like NX/VNC/RDP and etc, usually lack direct rendering and most X11 extensions therefor 3D simulation is broken. It's sad that this fact is ignored by distributions and desktop environments developers and we are enforced to deal with it here :-( -- 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 fails to start without hardware acceleration in cloud/remote environments (Forwarded-X/XRDP/VNC/NX/X2GO/Chromoting) Status in The GNOME 2 Session Manager: New Status in “gnome-session” package in Ubuntu: Triaged 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) To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-session/+bug/1251281/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
