Public bug reported:
Its not possible to start an XDMCP session on 15.04 X :1 -query localhost reported here, with patch. http://comments.gmane.org/gmane.comp.freedesktop.xorg.devel/44756 On my system it looks like this: X.Org X Server 1.17.1 Release Date: 2015-02-10 X Protocol Version 11, Revision 0 Build Operating System: Linux 3.2.0-61-generic x86_64 Ubuntu Current Operating System: Linux mvogt-ESPRIMO-P900 3.19.0-15-generic #15-Ubuntu SMP Thu Apr 16 23:32:37 UTC 2015 x86_64 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-generic.efi.signed root= UUID=19b64a42-57df-4059-a35b-85a17f427da2 ro quiet splash vt.handoff=7 Build Date: 19 March 2015 09:26:59AM xorg-server 2:1.17.1-0ubuntu3 (For technical support please see http://www.ubunt u.com/support) Current version of pixman: 0.32.6 Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.1.log", Time: Mon Apr 27 11:53:55 2015 (==) Using system config directory "/usr/share/X11/xorg.conf.d" (II) [KMS] Kernel modesetting enabled. (EE) Fatal server error: (EE) (EE) BUG: triggered 'if (f[f_idx])' (EE) BUG: ../../os/log.c:475 in vpnprintf() (EE) Unsupported printf directive '*' (EE) (EE) Backtrace: (EE) 0: X (xorg_backtrace+0x56) [0x7feccddde556] (EE) 1: X (0x7feccdc2b000+0x1c015f) [0x7feccddeb15f] (EE) 2: X (LogVMessageVerbSigSafe+0x4d) [0x7feccddeb9ed] (EE) 3: X (FatalError+0xea) [0x7feccddeb4ca] (EE) 4: X (0x7feccdc2b000+0x1c2a52) [0x7feccddeda52] (EE) 5: X (0x7feccdc2b000+0x1c2e4d) [0x7feccddede4d] (EE) 6: X (WakeupHandler+0x6b) [0x7feccdc87ddb] (EE) 7: X (WaitForSomething+0x1c3) [0x7feccdddb843] (EE) 8: X (0x7feccdc2b000+0x57ec1) [0x7feccdc82ec1] (EE) 9: X (0x7feccdc2b000+0x5c29b) [0x7feccdc8729b] (EE) 10: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7feccb911a4 0] (EE) 11: X (0x7feccdc2b000+0x4662e) [0x7feccdc7162e] (EE) XDMCP fatal error: Session declined %*.*s ProblemType: Bug DistroRelease: Ubuntu 15.04 Package: xserver-xorg 1:7.7+7ubuntu4 ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3 Uname: Linux 3.19.0-15-generic x86_64 ApportVersion: 2.17.2-0ubuntu1 Architecture: amd64 Date: Mon Apr 27 11:50:42 2015 InstallationDate: Installed on 2015-04-24 (2 days ago) InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) SourcePackage: xorg UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: xorg (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug vivid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1448958 Title: xorg crash on xdmcp query To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1448958/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp