minitube crashed with SIGSEGV in ref()

[Mark Rijckenberg]

Crash occurred while trying to play a random video in Minitube version 1.6 on Dell Latitude E6500, after performing direct upgrade from Kubuntu 10.04 to Kubuntu 12.04 Beta.

ProblemType: Crash
DistroRelease: Ubuntu 12.04
Package: minitube 1.6-1
Uname: Linux 3.3.0-030300rc4-generic i686
ApportVersion: 1.94-0ubuntu1
Architecture: i386
Date: Mon Mar 5 15:23:41 2012
ExecutablePath: /usr/bin/minitube
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
ProcCmdline: /usr/bin/minitube
ProcEnviron:
 LANGUAGE=en
 LANG=en_US.utf8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0xb2082a24: lock incl (%edx)
 PC (0xb2082a24) ok
 source "(%edx)" (0x00000020) not located in a known VMA region (needed readable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: minitube
StacktraceTop:
 ?? () from /usr/lib/i386-linux-gnu/qt4/plugins/phonon_backend/phonon_gstreamer.so
 ?? () from /usr/lib/i386-linux-gnu/qt4/plugins/phonon_backend/phonon_gstreamer.so
 ?? () from /usr/lib/i386-linux-gnu/libgstreamer-0.10.so.0
 g_closure_invoke () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgobject-2.0.so.0
Title: minitube crashed with SIGSEGV in g_closure_invoke()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 ref (this=0x20) at /usr/include/qt4/QtCore/qatomic_i386.h:120
 QString (other=..., this=<optimized out>) at /usr/include/qt4/QtCore/qstring.h:726
 node_create (avalue=..., akey=..., aupdate=0xa41e5360, adt=0xa1e7398, this=<optimized out>) at /usr/include/qt4/QtCore/qmap.h:456
 QMap<QString, QString>::detach_helper (this=0x9a31164) at /usr/include/qt4/QtCore/qmap.h:763
 detach (this=0x9a31164) at /usr/include/qt4/QtCore/qmap.h:205

[Mark Rijckenberg (markrijckenberg)]

More details about the video hardware that is being used on the Dell Latitude E6500:

$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07)
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07)
00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07)
00:19.0 Ethernet controller [0200]: Intel Corporation 82567LM Gigabit Network Connection [8086:10f5] (rev 03)
00:1a.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 [8086:2937] (rev 03)
00:1a.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 [8086:2938] (rev 03)
00:1a.2 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 [8086:2939] (rev 03)
00:1a.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 [8086:293c] (rev 03)
00:1b.0 Audio device [0403]: Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 03)
00:1c.0 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 [8086:2940] (rev 03)
00:1c.1 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 [8086:2942] (rev 03)
00:1c.2 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 3 [8086:2944] (rev 03)
00:1c.3 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 4 [8086:2946] (rev 03)
00:1d.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 [8086:2934] (rev 03)
00:1d.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 [8086:2935] (rev 03)
00:1d.2 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 [8086:2936] (rev 03)
00:1d.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 03)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 93)
00:1f.0 ISA bridge [0601]: Intel Corporation ICH9M-E LPC Interface Controller [8086:2917] (rev 03)
00:1f.2 SATA controller [0106]: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] [8086:2929] (rev 03)
00:1f.3 SMBus [0c05]: Intel Corporation 82801I (ICH9 Family) SMBus Controller [8086:2930] (rev 03)
03:01.0 CardBus bridge [0607]: Ricoh Co Ltd RL5c476 II [1180:0476] (rev ba)
03:01.1 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd R5C832 IEEE 1394 Controller [1180:0832] (rev 04)
03:01.2 SD Host controller [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter [1180:0822] (rev 21)
0c:00.0 Network controller [0280]: Intel Corporation WiFi Link 5100 [8086:4232]
ulysses@ulysses-laptop:~$ sudo lshw -C video
[sudo] password for ulysses:
  *-display:0
       description: VGA compatible controller
       product: Mobile 4 Series Chipset Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 07
       width: 64 bits
       clock: 33MHz
       cap...

[Mark Rijckenberg (markrijckenberg)]

I tried the following workaround:

https://bugs.launchpad.net/ubuntu/+source/minitube/+bug/921287/comments/7

It works a little bit better, but even when using that workaround, minitube 1.7 hangs when trying to switch to a different video and minitube automatically switches to the next Youtube video, when I try to seek to a later moment in the previous video.

Minitube 1.7 does not crash, but after viewing 1 or 2 video's, minitube does not allow me to switch to a third video. Something in minitube 1.7 is still hanging.

So the workaround does not fully solve this problem.

I have now reverted back to minitube 1.6 which is still crashing all the time.

[Mark Rijckenberg (markrijckenberg)]

Removing phonon-backend-gstreamer and installing phonon-backend-vlc instead does help minitube work a little better.

So I think part of the problem is that phonon-backend-gstreamer is not cooperating correctly with minitube (as mentioned here: https://bugs.launchpad.net/ubuntu/+source/minitube/+bug/921287/comments/7).

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.