He echado un vistazo al kmsg y al logcat,
El logcat mostraba esto:
[ 01-13 13:14:11.036 138:0xc46 I/mm-camera ]Open Device node : /dev/msm_camera/frame0
[ 01-13 13:14:11.036 138:0xc46 E/mm-camera ]Got exception but camframe_exit == 0!
[ 01-13 13:14:11.046 138:0xc46 E/QualcommCameraHardware ]ignoring preview callback--camera has been stopped
[ 01-13 13:14:11.196 138:0xc04 E/mm-camera 7x-vfe ]Received VFE start ACK!!! This is a user preview start.
[ 01-13 13:14:11.196 138:0x8a D/QualcommCameraHardware ]startPreview X
[ 01-13 13:14:11.226 2840:0xb18 V/camera ]mJpegCallbackFinishTime = 725ms
[ 01-13 13:14:11.337 2840:0xb18 D/camera ]
.....
[ 01-13 13:14:14.400 138:0x8a D/QualcommCameraHardware ]FLASHLIGHT is ENABLED
[ 01-13 13:14:14.410 138:0x8a D/QualcommCameraHardware ]stopPreviewInternal E: 1
[ 01-13 13:14:14.410 138:0x8a D/QualcommCameraHardware ]cancelAutoFocusInternal E
[ 01-13 13:14:14.410 138:0x8a D/QualcommCameraHardware ]cancelAutoFocusInternal X: 0
[ 01-13 13:14:14.480 138:0xc04 I/mm-camera 7x-vfe ]vfe_process_QDSP_VFETASK_MSG_VFE_STOP_ACK: call mmcamera_vfe_stop_ack_callback()
Me pregunto si hay un problema con la cámara, por curiosidad, cuando se toma una foto con la cámara, ¿normalmente reproduce un clip de audio con el sonido de "snapshot" cuando se presiona el botón?
Esto coincide con el error:
[ 4264.409912] adsp_pmem_del name JPEGTASK vaddr:0x40e68000 paddr:0x27012000 len:4096
[ 4264.420715] adsp: closing module JPEGTASK
[ 4264.421173] adsp: disabling module JPEGTASK
[ 4264.422485] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.444183] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.465789] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.487548] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.509094] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.530853] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.552398] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.574157] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.595733] [KEY] gpiomatrix: key 272, 0-0 (35-42) changed to 1
[ 4264.600616] [AUD][audmgr.c:audmgr_enable] audmgr_enable: ARM9 did not reply to RPC am->state = 2
[ 4264.601013] Unable to handle kernel NULL pointer dereference at virtual address 00000000
[ 4264.601226] pgd = e321c000
[ 4264.601593] [00000000] *pgd=26037031, *pte=00000000, *ppte=00000000
[ 4264.602294] Internal error: Oops: 817 [#1] PREEMPT
Así que supongo que el reproductor multimedia, en algún lugar, entre el hardware Qualcomm que controla la cámara, y la reproducción, se bloqueó. Estoy apostando al problema en la cámara del kernel en sí...
Es mejor publicar esto en el foro de CM para ver si este es un problema conocido.