When taking a photo, Cheese gets stuck after the countdown and no photo is taken

Running cheese in a terminal shows the following error message immediately after the countdown for a picture is up:

** CRITICAL **: cheese_main_window_finish_countdown_callback: assertion `self != NULL' failed

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

Upstream comments from David King <email address hidden> 2012-03-01 11:26:15 UTC:
"I cannot reproduce this, and that assertion should never be false, as it is
from a function internal to the MainWindow class. The only problem that I can
imagine is a threading problem. Please provide a backtrace, breaking on
cheese_main_window_finish_countdown_callback."

See https://wiki.ubuntu.com/Backtrace for more info

I have the same behavior on my ACER TravelMate 6593 and ACER Aspire One 532h.

In the attachment you will find a backtrace taken on the TravelMate

Seems to be a bug in ATI drivers

@Vadim You sure? My laptop uses integrated Intel graphics, and it was where I originally reported this issue from.

Christopher, this is what the backtrace from Franco says. Could you please repeat the same instructions (https://wiki.ubuntu.com/DebuggingProgramCrash) and provider a new backtrace?
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

@Vadim, here's my backtrace. Let me know if there's anything else you need me to do.

Could you please do the same procedure after installing
libglib2.0-0-dbg and libc6-dbg packages? This would give us a bit more
information

My apologies. I installed those packages and got a new backtrace. I hope this one will be more useful.

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

Now that I'm back in my dorm room and ran all available updates, I can confirm this issue now also occurs on my desktop using Nouveau on integrated NVIDIA graphics. I won't add another backtrace unless you think it's necessary, though.

Thanks, Christopher, I've sent the backtrace to the upstream bug
---
Ubuntu Bug Squad volunteer triager
http://wiki.ubuntu.com/BugSquad

Happens when using nvidia blob too.

I can confirm this bug on my Dell Vostro V131 notebook with all latest Update.
Ubuntu 12.04 amd64.

Device: "Laptop_Integrated_Webcam_HD(/dev/video0)"

Taking pictures is impossible. But video works just fine, also the effects are funny.

I can confirm this as well on my HP Pavilion dv6 notebook, 64-bit Ubuntu 12.04, all the latest updates.

Bus 001 Device 004: ID 064e:d281 Suyin Corp.

### v4l2 device info [/dev/video0] ###
general info
    VIDIOC_QUERYCAP
 driver : "uvcvideo"
 card : "HP TrueVision HD"
 bus_info : "usb-0000:00:1a.0-1.2"
 version : 3.2.9
 capabilities : 0x4000001 [VIDEO_CAPTURE,STREAMING]

I can still take pictures if I turn off the countdown.

I confirm this bug in my POSITIVO laptop.

tuxmatrix@USS-StarGazer:~$ sudo lshw
[sudo] password for tuxmatrix:
uss-stargazer
    descrição: Laptop
    produto: POSITIVO MOBILE (1234567890)
    fabricante: POSITIVO
    versão: 1.04.00_SIM
    serial: 1A445MY5E
    largura: 64 bits
    capabilities: smbios-2.6 dmi-2.6 vsyscall32
    configuração: boot=normal chassis=laptop sku=1234567890
  *-core
       descrição: Placa-mãe
       produto: MB40II4
       fabricante: POSITIVO
       physical id: 0
       versão: SIM
       serial: Not Applicable
     *-firmware
          descrição: BIOS
          fabricante: Phoenix Technologies LTD
          physical id: 0
          versão: 1.04.00.PO
          date: 06/03/2011
          tamanho: 101KiB
          capacity: 4032KiB
          capabilities: pci pnp upgrade shadowing escd cdboot acpi usb biosbootspecification
     *-cpu
          descrição: CPU
          produto: Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
          fabricante: Intel Corp.
          physical id: 4
          informações do barramento: cpu@0
          slot: CPU
          tamanho: 900MHz
          capacity: 900MHz
          largura: 64 bits
          clock: 100MHz
     *-memory
          descrição: Memória do sistema
          physical id: f
          slot: System board or motherboard
          tamanho: 6GiB
        *-display
             descrição: VGA compatible controller
             produto: 2nd Generation Core Processor Family Integrated Graphics Controller
             fabricante: Intel Corporation
             physical id: 2
             informações do barramento: pci@0000:00:02.0
             versão: 09
             largura: 64 bits
             clock: 33MHz
             capabilities: msi pm vga_controller bus_master cap_list rom
             configuração: driver=i915 latency=0
             recursos: irq:43 memória:f0000000-f03fffff memória:d0000000-dfffffff ioport:1800(tamanho=64)
tuxmatrix@USS-StarGazer:~$ lscpu
Arquitetura: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 8
On-line CPU(s) list: 0-7
Thread(s) por núcleo: 2
Núcleo(s) por soquete:4
Soquete(s): 1
NUMA node(s): 1
ID do fabricante: GenuineIntel
CPU family: 6
Modelo: 42
Stepping: 7
CPU MHz: 800.000
BogoMIPS: 3990.76
Virtualização: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 6144K
NUMA node0 CPU(s): 0-7
tuxmatrix@USS-StarGazer:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 004: ID 1ea7:0002
Bus 002 Device 003: ID 0a12:0001 Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)
Bus 002 Device 004: ID 5986:02a8 Acer, Inc
tuxmatrix@USS-StarGazer:~$ v4l-info

### v4l2 device info [/dev/video0] ###
general info
    VIDIOC_QUERYCAP
 driver : "uvcvideo"
 card...

as i said it upstream. The source used by ubuntu package is not clean. You should run "make maintainer-clean-generic" before building package.

When I start cheese in a terminal and then click onto "Take a Photo" in the terminal I get the error

"** CRITICAL **: cheese_main_window_finish_countdown_callback: assertion `self != NULL' failed"

This bug was fixed in the package cheese - 3.3.90-0ubuntu3

---------------
cheese (3.3.90-0ubuntu3) precise; urgency=low

  * debian/rules: Remove vala generated c files in clean
    target (LP: #942238).
  * debian/patches/01_update_translations.patch:
   - Update to latest translations from git (LP: #953095).
 -- Andrew Starr-Bochicchio <email address hidden> Mon, 19 Mar 2012 00:32:51 -0400

With the latest updates cheese really works just fine :-)