commit 97cf53cc2ad7ecfdd495133bad31d0ec7d939326
Author: Søren Sandmann Pedersen <>
Date:   Mon Oct 21 16:58:54 2013 -0400

    ephyr: hostx_screen_init(): Fix bits_per_pixel and bytes_per_line
    When the depth of the Xephyr server matches that of the host X server,
    Xephyr simply uses the buffer associated with the XImage as its
    framebuffer. In this case, it is correct to get the bits_per_pixel and
    bytes_per_line values returned from hostx_screen_init() from the XImage.
    However, when the depth doesn't match the host, Xephyr uses a private
    framebuffer that is periodically copied to the XImage. In this case,
    the returned values of bits_per_pixel and bytes_per_line should be
    those of the private framebuffer, not those of the XImage.
    Reviewed-by: Eric Anholt <>
    Signed-off-by: Soren Sandmann <>
    Reviewed-by: Adam Jackson <>

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  Xephyr crashed with SIGSEGV

Status in X.Org X server:
  Fix Released
Status in xorg-server package in Ubuntu:

Bug description:
  Calling Xephyr :1 -query localhost with a XDMCP enabled gdm server.

  ProblemType: Crash
  DistroRelease: Ubuntu 10.10
  Package: xserver-xephyr 2:1.9.0-0ubuntu5
  ProcVersionSignature: Ubuntu 2.6.35-20.29-generic
  Uname: Linux 2.6.35-20-generic i686
  Architecture: i386
  Date: Sat Sep 11 08:34:27 2010
  Disassembly: => 0x2e6271:     Cannot access memory at address 0x2e6271
  ExecutablePath: /usr/bin/Xephyr
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100908)
  Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: Bochs Bochs
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-20-generic 
root=UUID=7b55ca20-b8cc-4da3-a4dd-d284582b4bad ro quiet splash
  ProcCmdline: Xephyr :1 -query localhost
   Segfault happened at: 0x2e6271:      Cannot access memory at address 0x2e6271
   PC (0x002e6271) ok
   SP (0xbfcb081c) ok
   Reason could not be automatically determined.
  Signal: 11
  SourcePackage: xorg-server
   #0  0x002e6271 in ?? ()
   No symbol table info available.
   #1  0x00000000 in ?? ()
   No symbol table info available.
   ?? ()
   ?? ()
  Title: Xephyr crashed with SIGSEGV
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
   (bluetooth-applet:13370): Gtk-CRITICAL **: IA__gtk_widget_set_sensitive: 
assertion `GTK_IS_WIDGET (widget)' failed
   (polkit-gnome-authentication-agent-1:13374): GLib-CRITICAL **: 
g_once_init_leave: assertion `initialization_value != 0' failed
   (nautilus:13376): GConf-CRITICAL **: gconf_value_free: assertion `value != 
NULL' failed 01/01/2007
  dmi.bios.vendor: Bochs
  dmi.bios.version: Bochs
  dmi.chassis.type: 1
  dmi.chassis.vendor: Bochs
dmi:bvnBochs:bvrBochs:bd01/01/2007:svnBochs:pnBochs:pvr:cvnBochs:ct1:cvr: Bochs
  dmi.sys.vendor: Bochs
  glxinfo: Error: [Errno 2] No such file or directory
   distro:             Ubuntu
   codename:           maverick
   architecture:       i686
   kernel:             2.6.35-20-generic

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