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[Martin Vogt <mvogt1@xxxxxxxxx>]

apport information

** Attachment added: "UdevDb.txt"
   https://bugs.launchpad.net/bugs/1448958/+attachment/4390682/+files/UdevDb.txt

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https://bugs.launchpad.net/bugs/1448958

Title:
  xorg crash on xdmcp query

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  
  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)
  --- 
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroRelease: Ubuntu 15.04
  DistroVariant: ubuntu
  ExtraDebuggingInterest: I just need to know a workaround
  GraphicsCard:
   Advanced Micro Devices, Inc. [AMD/ATI] Caicos [Radeon HD 6450/7450/8450 / R5 230 OEM] [1002:6779] (prog-if 00 [VGA controller])
     Subsystem: PC Partner Limited / Sapphire Technology Radeon HD 6450 1 GB DDR3 [174b:e164]
  InstallationDate: Installed on 2015-04-24 (9 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: FUJITSU ESPRIMO P900
  Package: xorg 1:7.7+7ubuntu4
  PackageArchitecture: amd64
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-15-generic.efi.signed root=UUID=19b64a42-57df-4059-a35b-85a17f427da2 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Tags:  vivid ubuntu
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  Uname: Linux 3.19.0-15-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  _MarkForUpload: True
  dmi.bios.date: 05/16/2011
  dmi.bios.vendor: FUJITSU // American Megatrends Inc.
  dmi.bios.version: V4.6.4.0 R1.11.0 for D3062-A1x
  dmi.board.name: D3062-A1
  dmi.board.vendor: FUJITSU
  dmi.board.version: S26361-D3062-A1
  dmi.chassis.type: 6
  dmi.chassis.vendor: FUJITSU
  dmi.chassis.version: C$PXW1
  dmi.modalias: dmi:bvnFUJITSU//AmericanMegatrendsInc.:bvrV4.6.4.0R1.11.0forD3062-A1x:bd05/16/2011:svnFUJITSU:pnESPRIMOP900:pvr:rvnFUJITSU:rnD3062-A1:rvrS26361-D3062-A1:cvnFUJITSU:ct6:cvrC$PXW1:
  dmi.product.name: ESPRIMO P900
  dmi.sys.vendor: FUJITSU
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.2-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.2-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2build1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Mon May  4 15:43:50 2015
  xserver.configfile: default
  xserver.devices:
   input        Power Button         KEYBOARD, id 6
   input        Power Button         KEYBOARD, id 7
   input        Logitech USB Optical Mouse MOUSE, id 8
   input        HID 046a:0011        KEYBOARD, id 9
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.17.1-0ubuntu3
  xserver.video_driver: radeon

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