[Verizon Samsung Galaxy S 4] albinoman887:
this post was from my kernel thread for another cariier variant but should apply here... this is with the TW kernel....a reboot log....when/if you grab a last_kmsg scroll to the bottom of it and see if you see this error repeating.. it will help weed out the duplicate logs

well heres where you press a button to wake the device.. eventually you see a error with ION.. which is kinda confusing.. since i didnt douch that obviously.. kernel might need a rebase.. anyone know of a pretty stock TW kernel source code somewhere? or the stock source code...right now my kernel is a fork of ktoonz and his is having reboots as well. probably the same reason

[ 6900.818542] msm_release_ion_client Calling ion_client_destroy client d7bfb840
[ 6907.212920] [TouchKey]press=1, code=0
[ 6907.326232] [TouchKey]press=0, code=0
[ 6910.034606] msm_ioctl_server: MSM_CAM_IOCTL_V4L2_EVT_NATIVE_FRONT_CMD : 69
[ 6910.080901] msm_ioctl_server: MSM_CAM_IOCTL_V4L2_EVT_NATIVE_FRONT_CMD : 69
[ 6910.087341] msm_ioctl_server: MSM_CAM_IOCTL_V4L2_EVT_NATIVE_FRONT_CMD : 69
[ 6910.229522] init: sys_prop: permission denied uid:1013 name:persist.sys.camera.preview
[ 6910.384917] mdp4_mixer_blend_setup: Error: no bg_pipe at mixer=0
[ 6910.482024] dtv_pipe is not configured yet
[ 6911.142852] init: sys_prop: permission denied uid:1013 name:persist.sys.camera.preview
[ 6911.153838] init: sys_prop: permission denied uid:1013 name:persist.sys.camera.preview
[ 6911.161956] init: sys_prop: permission denied uid:1013 name:persist.sys.camera.preview
[ 6911.268615] msm_release_ion_client Calling ion_client_destroy client d0957b00
[ 6911.520080] KTMAX77693-2-460
[ 7679.987060] [TouchKey] cypress_touchkey_led_work 410 Touchkey is not enabled.
[ 7680.063201] KTMAX77693-2-460
[ 7680.168273] [mdnie lite] is negative Mode On = 0
[ 7680.171935] [mdnie lite] negative off when resume, tuning again!
[ 7680.178863] [mdnie lite] mDNIe_Set_Mode start , mode(0), background(2)
[ 7680.184447] [mdnie lite] = UI MODE =
[ 7680.188079] [mdnie lite] = NATURAL MODE =
[ 7680.192168] [mdnie lite] send tuning cmd!!
[ 7680.218078] [mdnie lite] mDNIe_Set_Mode end , mode(0), background(2)
[ 7680.223479] kgsl kgsl-3d0: |kgsl_late_resume_driver| late resume start
[ 7680.239135] kgsl kgsl-3d0: |kgsl_late_resume_driver| late resume end
[ 7680.284606] msm_iommu: Unexpected IOMMU page fault!
[ 7680.288604] msm_iommu: name = mdp1
[ 7680.292175] msm_iommu: context = mdp_port1_cb0 (0)
[ 7680.296905] msm_iommu: Interesting registers:
[ 7680.301269] msm_iommu: FAR = 00000000 PAR = 00000000
[ 7680.307098] msm_iommu: FSR = 4001000a [TF APF SL SS ]
[ 7680.312286] msm_iommu: FSYNR0 = 0f000002 FSYNR1 = 00445463
[ 7680.318053] msm_iommu: TTBR0 = 9f184000 TTBR1 = 00000000
[ 7680.323730] msm_iommu: SCTLR = 00000003 ACTLR = 00037072
[ 7680.329528] msm_iommu: PRRR = ff0881a8 NMRR = 40e040e0
[ 7680.335235] msm_iommu: Unexpected IOMMU page fault!
[ 7680.340118] msm_iommu: name = mdp1
[ 7680.343688] msm_iommu: context = mdp_port1_cb0 (0)
[ 7680.348510] msm_iommu: Interesting registers:
[ 7680.352813] msm_iommu: FAR = 00000060 PAR = 00000000
[ 7680.358550] msm_iommu: FSR = 4001000a [TF APF SL SS ]
[ 7680.363891] msm_iommu: FSYNR0 = 0e000002 FSYNR1 = 00445463
[ 7680.369598] msm_iommu: TTBR0 = 9f184000 TTBR1 = 00000000
[ 7680.375335] msm_iommu: SCTLR = 00000003 ACTLR = 00037072
[ 7680.381042] msm_iommu: PRRR = ff0881a8 NMRR = 40e040e0
[ 7680.386810] msm_iommu: Unexpected IOMMU page fault!
[ 7680.391631] msm_iommu: name = mdp1
[ 7680.395293] msm_iommu: context = mdp_port1_cb0 (0)
[ 7680.400054] msm_iommu: Interesting registers:
[ 7680.404388] msm_iommu: FAR = 000000c0 PAR = 00000000
[ 7680.410339] msm_iommu: FSR = 4001000a [TF APF SL SS ]
[ 7680.415404] msm_iommu: FSYNR0 = 0d000002 FSYNR1 = 00445463
[ 7680.421172] msm_iommu: TTBR0 = 9f184000 TTBR1 = 00000000
[ 7680.426849] msm_iommu: SCTLR = 00000003 ACTLR = 00037072
[ 7680.432647] msm_iommu: PRRR = ff0881a8 NMRR = 40e040e0
[ 7680.438384] msm_iommu: Unexpected IOMMU page fault!
[ 7680.443237] msm_iommu: name = mdp1
[ 7680.446838] msm_iommu: context = mdp_port1_cb0 (0)
[ 7680.451659] msm_iommu: Interesting registers:
[ 7680.456023] msm_iommu: FAR = 00000120 PAR = 00000000
[ 7680.461730] msm_iommu: FSR = 4001000a [TF APF SL SS ]
[ 7680.466979] msm_iommu: FSYNR0 = 0c000002 FSYNR1 = 00445463
[ 7680.472747] msm_iommu: TTBR0 = 9f184000 TTBR1 = 00000000
[ 7680.478423] msm_iommu: SCTLR = 00000003 ACTLR = 00037072
[ 7680.484191] msm_iommu: PRRR = ff0881a8 NMRR = 40e040e0
[ 7680.489928] msm_iommu: Unexpected IOMMU page fault!
[ 7680.494750] msm_iommu: name = mdp1
[ 7680.498443] msm_iommu: context = mdp_port1_cb0 (0)
[ 7680.503173] [0,0,1080,1920]->[0,0,1080,1920]|0|12|4|1|172032000|995229696|2488074240|
[ 7680.511016] [0,0,1080,1920]->[0,0,1080,1920]|0|26|4|5|172032000|995229696|2488074240|
[ 7680.518829] **[2][0|2550136832|1006632960|2550136832|177780000]**
[ 7680.525085] msm_iommu: Interesting registers:
[ 7680.529266] msm_iommu: FAR = 00000000 PAR = 00000000
[ 7680.534942] msm_iommu: FSR = 4001000a [TF APF SL SS ]
[ 7680.540252] msm_iommu: FSYNR0 = 0f000002 FSYNR1 = 00447463
[ 7680.545989] msm_iommu: TTBR0 = 9f184000 TTBR1 = 00000000
[ 7680.551757] msm_iommu: SCTLR = 00000003 ACTLR = 00037072
[ 7680.557433] msm_iommu: PRRR = ff0881a8 NMRR = 40e040e0
[ 7680.563262] msm_iommu: Unexpected IOMMU page fault!