While testing Gecko master on Nexus S, I ran into this issue: starting the Camera application, then switching to another application, Gecko restarts. After careful investigation, some Gecko child process got a SIGKILL. logcat shows: I/CameraHardwareSec( 1301): int android::HAL_camera_device_open(const hw_module_t*, const char*, hw_device_t**): open camera 0 E/SecCamera( 1301): initCamera: m_cam_fd(17), m_jpeg_fd(0) I/SecCamera( 1301): Name of input channel[0] is S5K4ECGX E/SecCamera( 1301): initCamera: m_cam_fd2(18) I/SecCamera( 1301): Name of input channel[0] is S5K4ECGX I/SecCamera( 1301): initCamera : initialized I/SecCamera( 1301): Name of input channel[0] is S5K4ECGX I/CameraHardwareSec( 1301): int android::HAL_camera_device_open(const hw_module_t*, const char*, hw_device_t**): opened camera 0 (0x19373c8) I/CameraHardwareSec( 1301): int android::CameraHardwareSec::previewThreadWrapper(): starting I/CameraHardwareSec( 1301): int android::CameraHardwareSec::previewThreadWrapper(): calling mSecCamera->stopPreview() and waiting W/SecCamera( 1301): int android::SecCamera::stopPreview(): doing nothing because m_flag_camera_start is zero I/AwesomePlayer( 1301): setDataSource_l('/system/media/audio/ui/camera_click.ogg') D/CameraHardwareSec( 1301): mPreviewHeap(fd(17), size(460800), width(640), height(480)) I/CameraHardwareSec( 1301): int android::CameraHardwareSec::previewThreadWrapper(): return from wait I/CameraHardwareSec( 1301): int android::CameraHardwareSec::previewThreadWrapper(): calling mSecCamera->stopPreview() and waiting I/CameraHardwareSec( 1301): void android::CameraHardwareSec::stopPreviewInternal() : preview not running, doing nothing I/CameraHardwareSec( 1301): void android::CameraHardwareSec::stopPreviewInternal() : preview not running, doing nothing I/CameraHardwareSec( 1301): int android::CameraHardwareSec::previewThreadWrapper(): return from wait I/CameraHardwareSec( 1301): int android::CameraHardwareSec::previewThreadWrapper(): exiting W/SecCamera( 1301): int android::SecCamera::stopPreview(): doing nothing because m_flag_camera_start is zero W/SecCamera( 1301): int android::SecCamera::stopRecord(): doing nothing because m_flag_record_start is zero I/SecCamera( 1301): DeinitCamera: m_cam_fd(17) I/SecCamera( 1301): DeinitCamera: m_cam_fd2(18) E/CameraHardwareSec( 1301): preview window is NULL! I/CameraService( 1301): Destroying camera 0 I/CameraHardwareSec( 1301): int android::HAL_camera_device_close(hw_device_t*) I/SecCamera( 1301): DeinitCamera : already deinitialized I/ServiceManager( 73): service 'media.camera' died According to those messages, it seems that we are passing some NULL pointer at some time :(

I can't reproduce after reverting 8592c4c12d6d5a87c5e14e0268ca5e78af2291e0 which is bug 858914. Nicolas, do you have any idea why this would happen ?

Just checking, have you tested before or after this landed https://hg.mozilla.org/mozilla-central/rev/0c2f8e48c612 ? It fixes a somewhat similar issue. I'll try to reporduce it Monday on my unagi.

(In reply to Nicolas Silva [:nical] from comment #2) > Just checking, have you tested before or after this landed > https://hg.mozilla.org/mozilla-central/rev/0c2f8e48c612 ? > It fixes a somewhat similar issue. > I'll try to reporduce it Monday on my unagi. Looks like I got the code just prior this fix, I'll git it a try with it then :)

After updating and ensuring that the pointed patch was in my tree, I can't reproduce.