** Description changed:

  Running my own build of the natty 'master-next' kernel branch
- (2.6.38-6.33 at SHA1-ID "5754cb"; based on linux 2.6.38-rc7), the
+ (2.6.38-6.33 at SHA1-ID "57545cb"; based on linux 2.6.38-rc7), the
  default unity desktop session makes compiz crash immediately upon login
  (100% reproducible):
  
-   compiz[1388]: segfault at 20 ip 00007ff0cee9702a sp 00007fffc50a9580
+   compiz[1388]: segfault at 20 ip 00007ff0cee9702a sp 00007fffc50a9580
  error 4 in i965_dri.so[7ff0cee6b000+ac000]
  
  The crash does NOT occur when running the natty main kernel
  (2.6.38-5.32), so this appears to be a regression caused by the master-
  next branch.
  
  Note that I the gnome-panel (classic) session works fine. Also, after
  unity/compiz crashes, I can then switch to a VT and launch gnome-panel
  and compiz manually... In that state, "unity --replace" does make the
  same crash occur immediately. (Effectively, only unity seems to provoke
  this compiz crash, and it always does so).
  
  uname: Linux marconi 2.6.38-6-generic #33~kamal~57545cb (my build from 
master-next)
  unity: Installed: 3.6.0-0ubuntu2 (from natty/main)
  compiz: Installed: 1:0.9.4-0ubuntu3 (from natty/main)
  libgl1-mesa-dri: Installed: 7.10.1~git20110215.cc1636b6-0ubuntu2 (from 
natty/main)
  
  ProblemType: Crash
  DistroRelease: Ubuntu 11.04
  Package: libnux-0.9-0 0.9.30-0ubuntu1
  ProcVersionSignature: Ubuntu 2.6.38-6.33~username~57545cb-generic 2.6.38-rc7
  Uname: Linux 2.6.38-6-generic x86_64
  Architecture: amd64
  Date: Thu Mar  3 11:36:56 2011
  ExecutablePath: /usr/bin/compiz
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20101214)
  ProcCmdline: compiz
  ProcCwd: /home/kamal
  ProcEnviron:
-  LANGUAGE=en_US:en
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_US:en
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SegvAnalysis:
-  Segfault happened at: 0x7ff0cee9702a <intel_miptree_image_copy+42>:  cmpb   
$0x0,0x20(%rsi)
-  PC (0x7ff0cee9702a) ok
-  source "$0x0" ok
-  destination "0x20(%rsi)" (0x00000020) not located in a known VMA region 
(needed writable region)!
+  Segfault happened at: 0x7ff0cee9702a <intel_miptree_image_copy+42>:  cmpb   
$0x0,0x20(%rsi)
+  PC (0x7ff0cee9702a) ok
+  source "$0x0" ok
+  destination "0x20(%rsi)" (0x00000020) not located in a known VMA region 
(needed writable region)!
  SegvReason: writing NULL VMA
  Signal: 11
  SourcePackage: nux
  StacktraceTop:
-  intel_miptree_image_copy () from /usr/lib/dri/i965_dri.so
-  intel_finalize_mipmap_tree () from /usr/lib/dri/i965_dri.so
-  brw_validate_textures () from /usr/lib/dri/i965_dri.so
-  brw_draw_prims () from /usr/lib/dri/i965_dri.so
-  ?? () from /usr/lib/dri/libdricore.so
+  intel_miptree_image_copy () from /usr/lib/dri/i965_dri.so
+  intel_finalize_mipmap_tree () from /usr/lib/dri/i965_dri.so
+  brw_validate_textures () from /usr/lib/dri/i965_dri.so
+  brw_draw_prims () from /usr/lib/dri/i965_dri.so
+  ?? () from /usr/lib/dri/libdricore.so
  Title: compiz crashed with SIGSEGV in intel_miptree_image_copy()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

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https://bugs.launchpad.net/bugs/728672

Title:
  compiz crashed with SIGSEGV in intel_miptree_image_copy()

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