plymouthd crashed with SIGSEGV in script_obj_deref_direct() after OS startup, after logged in session

[TadejTadej]

Binary package hint: plymouth

This happens on every startup since upgrading to 11.04 beta.
My ubuntu install history: started as 10.04, upgraded 10.10 and now to 11.04 beta.

tadej@latoya:~$ lsb_release -rd
Description: Ubuntu Natty (development branch)
Release: 11.04

tadej@latoya:~$ apt-cache policy plymouth
plymouth:
  Installed: 0.8.2-2ubuntu21
  Candidate: 0.8.2-2ubuntu21
  Version table:
 *** 0.8.2-2ubuntu21 0
        500 http://si.archive.ubuntu.com/ubuntu/ natty/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
DistroRelease: Ubuntu 11.04
Package: plymouth 0.8.2-2ubuntu21
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Tue Apr 12 20:25:02 2011
DefaultPlymouth: /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.plymouth
ExecutablePath: /sbin/plymouthd
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
MachineType: LENOVO 40625YG
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdline: /sbin/plymouthd --mode=boot --attach-to-session
ProcEnviron: PATH=(custom, no user)
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic root=UUID=ae78c311-c2ab-418f-807d-408beea0386d ro quiet splash vt.handoff=7
SegvAnalysis:
 Segfault happened at: 0x7fe9d134a000 <script_obj_deref_direct>: cmpl $0x1,(%rdi)
 PC (0x7fe9d134a000) ok
 source "$0x1" ok
 destination "(%rdi)" (0x726f207465792079) not located in a known VMA region (needed writable region)!
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: plymouth
StacktraceTop:
 script_obj_deref_direct () from /lib/plymouth/script.so
 script_obj_as_custom () from /lib/plymouth/script.so
 script_execute_object () from /lib/plymouth/script.so
 script_lib_plymouth_on_message () from /lib/plymouth/script.so
 ?? () from /lib/plymouth/script.so
TextPlymouth: /lib/plymouth/themes/ubuntu-text/ubuntu-text.plymouth
Title: plymouthd crashed with SIGSEGV in script_obj_deref_direct()
UpgradeStatus: Upgraded to natty on 2011-04-11 (1 days ago)
UserGroups:

dmi.bios.date: 10/02/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7VET80WW (3.10 )
dmi.board.name: 40625YG
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7VET80WW(3.10):bd10/02/2009:svnLENOVO:pn40625YG:pvrThinkPadW500:rvnLENOVO:rn40625YG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 40625YG
dmi.product.version: ThinkPad W500
dmi.sys.vendor: LENOVO

[TadejTadej (tadej)]

One more thing: the Lenovo W500 I am using has two GPUs: an Intel built-in one and an ATi FireGL 5700 Mobile, which is basically a Radeon 3650 with a different BIOS and 512 MB of graphics memory. Since plymouth is a graphical bootloader, I suspect it has sth to do with the graphics. In this case, I was using just the ATi, the Intel graphics were disabled in system BIOS. Driver is fglrx (as can be seen in attached dumps somewhere).

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make Ubuntu better. This particular crash has already been reported and is a duplicate of bug #733453, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.