[Xperia Z Q&A, Help & Troubleshooting] Jorge Plascencia:
I Haven't found a fix to the problem yet mate, the only work around was to download "Wakelock power manager" & activate a "Partial Lock". that's it, no reboots, but the downside it's the battery drain cause of the cpu running all the time. i'm still waiting for someone that knows more about development that could guide us through, or interpretate all of this.

Update: i installed Syslog app, & was able to get the kernel logs, when i download it, it just has an option to "take Log" when i press it, it sends me a pop up to upload the logs somewhere, uploaded them to my personal dropbox, the zip file that contains the logs, has 3 files, one named "dmesg" other "last_kmsg" and another "logcat". it seems that the logcat always comes empty, no lines, the other 2 have plenty of lines, i don't know scrub about code lines, but im guessing the important ones are the first and last of them, (this supposing this logs could "get" or "trap" the error lines that derive the reboots, cause i don't know if the logs only fetch the lines inmediately after the reboot or inmediately before the error & reboot)

i'm attaching the lines here & then the full logs so if anyone that knows his ways about code (which here i believe is plenty) PLEASE :crying: give them a look and see if they shed some light on the issue. thanks in advance!

these are the last lines of the "Las_kmsg" log. (noob comment: the last lines seem different & out of pattern with the rest of the log. :confused: )

[31072.504638] PM: noirq suspend of devices complete after 27.426 msecs
[31072.504669] Disabling non-boot CPUs ...
[31072.550048] msm_pm_enter
[31072.550048] msm_pm_enter: power collapse
[31072.550048] msm_mpm_irqs_detectable: cannot monitor 000000,00000000,00000000,00000000,00000000,00000020,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000
[31072.550048] msm_pm_enter: return
[31072.550659] Enabling non-boot CPUs ...
[31072.557434] CPU1 is up
[31072.568084] CPU2 is up
[31072.577880] CPU3 is up
[31072.598236] PM: noirq resume of devices complete after 20.278 msecs
[31072.602783] PM: early resume of devices complete after 1.585 msecs
[31072.609435] GPU VOLTAGE - 975000 - 0
[31072.634521] msm_fb_ext_resume: Turning on HPD circuitry
[31072.635345] clearpad clearpad: disable irq wake
[31072.640319] PM: resume of devices complete after 37.480 msecs
[31072.746124] Restarting tasks ... done.
[31073.042449] L1 / TLB Error detected on CPU 3!
[31073.046173]	CESR = 0x00000008
[31073.049621]	CPU speed = 81000
[31073.052978]	MIDR = 0x510f06f2
[31073.056121] I-cache data parity error
[31073.059783] I-side CESYNR = 0x00408848
[31073.063842] Kernel panic - not syncing: L1 nonrecoverable cache error detected
[31073.070800] [<c010c2f0>] (unwind_backtrace+0x0/0xdc) from [<c0891868>] (panic+0x8c/0x1cc)
[31073.079254] [<c0891868>] (panic+0x8c/0x1cc) from [<c016c0c0>] (msm_l1_erp_irq+0x1b8/0x21c)
[31073.087524] [<c016c0c0>] (msm_l1_erp_irq+0x1b8/0x21c) from [<c01cf4e8>] (handle_percpu_devid_irq+0xf0/0x190)
[31073.097289] [<c01cf4e8>] (handle_percpu_devid_irq+0xf0/0x190) from [<c01cbed0>] (generic_handle_irq+0x20/0x30)
[31073.106964] [<c01cbed0>] (generic_handle_irq+0x20/0x30) from [<c0105d28>] (handle_IRQ+0x80/0xb8)
[31073.116027] [<c0105d28>] (handle_IRQ+0x80/0xb8) from [<c0100400>] (gic_handle_irq+0x90/0x10c)
[31073.124542] [<c0100400>] (gic_handle_irq+0x90/0x10c) from [<c089b19c>] (__irq_usr+0x3c/0x60)
[31073.132934] Exception stack(0xec07bfb0 to 0xec07bff8)
[31073.137634] bfa0: 00000000 00000000 00000000 00000389
[31073.146148] bfc0: 400b1d94 7675f6e4 0000001c 7675f6e4 7ac7fdf8 000003ff 400a880c 401cd6e7
[31073.154296] bfe0: 03894001 7675f628 00000001 4006e84a 80070030 ffffffff
[31073.161560] CPU0: stopping
[31073.163635] [<c010c2f0>] (unwind_backtrace+0x0/0xdc) from [<c010ae38>] (handle_IPI+0xf4/0x1d4)
[31073.172546] [<c010ae38>] (handle_IPI+0xf4/0x1d4) from [<c0100470>] (gic_handle_irq+0x100/0x10c)
[31073.181243] [<c0100470>] (gic_handle_irq+0x100/0x10c) from [<c089afc0>] (__irq_svc+0x40/0x74)
[31073.189727] Exception stack(0xc0e19f10 to 0xc0e19f58)
[31073.194427] 9f00: 00000018 00000002 00000002 00000002
[31073.202911] 9f20: c4c8dfc0 00000002 00000000 c0f2a69c c10bc448 c0e709f8 00000000 c0f2a750
[31073.211059] 9f40: 00000000 c0e19f58 c014d57c c01536c8 60000013 ffffffff
[31073.217376] [<c089afc0>] (__irq_svc+0x40/0x74) from [<c01536c8>] (msm_cpuidle_enter+0x58/0x60)
[31073.226287] [<c01536c8>] (msm_cpuidle_enter+0x58/0x60) from [<c06552c8>] (cpuidle_idle_call+0x1b4/0x33c)
[31073.235748] [<c06552c8>] (cpuidle_idle_call+0x1b4/0x33c) from [<c0106334>] (cpu_idle+0x5c/0xe8)
[31073.244445] [<c0106334>] (cpu_idle+0x5c/0xe8) from [<c086a314>] (rest_init+0x88/0xa4)
[31073.251922] [<c086a314>] (rest_init+0x88/0xa4) from [<c0d00b40>] (start_kernel+0x3f8/0x45c)
[31073.260559] CPU2: stopping
[31073.260559] &@running_process@cpu0:*swapper/0*
[31073.267730] [<c010c2f0>] (unwind_backtrace+0x0/0xdc) from [<c010ae38>] (handle_IPI+0xf4/0x1d4)
[31073.275970] [<c010ae38>] (handle_IPI+0xf4/0x1d4) from [<c0100470>] (gic_handle_irq+0x100/0x10c)
[31073.284973] [<c0100470>] (gic_handle_irq+0x100/0x10c) from [<c089afc0>] (__irq_svc+0x40/0x74)
[31073.293456] Exception stack(0xed19bf60 to 0xed19bfa8)
[31073.298156] bf60: 00000018 00000002 00000001 00000002 c4ca1fc0 00000002 00000000 c0f2a69c
[31073.306640] bf80: c10bc448 c0e709f8 00000002 c0f2a750 00000000 ed19bfa8 c014d57c c01536c8
[31073.314788] bfa0: 60000013 ffffffff
[31073.317993] [<c089afc0>] (__irq_svc+0x40/0x74) from [<c01536c8>] (msm_cpuidle_enter+0x58/0x60)
[31073.326904] [<c01536c8>] (msm_cpuidle_enter+0x58/0x60) from [<c06552c8>] (cpuidle_idle_call+0x1b4/0x33c)
[31073.336364] [<c06552c8>] (cpuidle_idle_call+0x1b4/0x33c) from [<c0106334>] (cpu_idle+0x5c/0xe8)
[31073.345031] [<c0106334>] (cpu_idle+0x5c/0xe8) from [<80a8c654>] (0x80a8c654)
[31073.351745] CPU1: stopping
[31073.351745] &@running_process@cpu2:*swapper/2*
[31073.359466] [<c010c2f0>] (unwind_backtrace+0x0/0xdc) from [<c010ae38>] (handle_IPI+0xf4/0x1d4)
[31073.368041] [<c010ae38>] (handle_IPI+0xf4/0x1d4) from [<c0100470>] (gic_handle_irq+0x100/0x10c)
[31073.376312] [<c0100470>] (gic_handle_irq+0x100/0x10c) from [<c089afc0>] (__irq_svc+0x40/0x74)
[31073.385192] Exception stack(0xc0053f60 to 0xc0053fa8)
[31073.390228] 3f60: 00000018 00000002 00000001 00000002 c4c97fc0 00000002 00000000 c0f2a69c
[31073.397979] 3f80: c10bc448 c0e709f8 00000001 c0f2a750 00000000 c0053fa8 c014d57c c01536c8
[31073.406555] 3fa0: 60000013 ffffffff
[31073.409637] [<c089afc0>] (__irq_svc+0x40/0x74) from [<c01536c8>] (msm_cpuidle_enter+0x58/0x60)
[31073.418670] [<c01536c8>] (msm_cpuidle_enter+0x58/0x60) from [<c06552c8>] (cpuidle_idle_call+0x1b4/0x33c)
[31073.428131] [<c06552c8>] (cpuidle_idle_call+0x1b4/0x33c) from [<c0106334>] (cpu_idle+0x5c/0xe8)
[31073.436767] [<c0106334>] (cpu_idle+0x5c/0xe8) from [<80a8c654>] (0x80a8c654)
[31073.443359] &@running_process@cpu1:*swapper/1*
[31073.443420] wcnss_8960: crash shutdown : 0
[31073.945098] &@panic_name@:*android.bg*
[31073.948821] Rebooting in 5 seconds..
[31078.961639] Restarting Linux version 3.4.104lightning-kernel-version-6-cm-g85c8594-dirty (nikhil18@ubuntu) (gcc version 4.9.1 20140529 (prerelease) (crosstool-NG linaro-1.13.1+bzr2665 - Linaro GCC 2014.06 - Cortex-A15) ) #1 SMP PREEMPT Tue Oct 14 08:54:45 PDT 2014
[31078.961669]
[31078.985839]
[31078.987335] Restarting Linux version 3.4.104lightning-kernel-version-6-cm-g85c8594-dirty (nikhil18@ubuntu) (gcc version 4.9.1 20140529 (prerelease) (crosstool-NG linaro-1.13.1+bzr2665 - Linaro GCC 2014.06 - Cortex-A15) ) #1 SMP PREEMPT Tue Oct 14 08:54:45 PDT 2014
[31078.987335]
[31079.013427] Going down for restart now

No errors detected

These are the last lines of the "dmesg" Log, here i don't find anything weird.

<3>[ 309.245300] AXI: msm_bus_scale_client_update_request(): Client 3254374336 passed invalid index: 5
<1>[ 309.320800] GPU VOLTAGE - 1075000 - 0
<1>[ 309.325195] GPU VOLTAGE - 1175000 - 0
<1>[ 309.463684] GPU VOLTAGE - 1075000 - 0
<1>[ 309.548309] GPU VOLTAGE - 1175000 - 0
<1>[ 309.638000] GPU VOLTAGE - 1075000 - 0
<1>[ 309.648376] GPU VOLTAGE - 1175000 - 0
<1>[ 309.673736] GPU VOLTAGE - 1075000 - 0
<1>[ 309.679107] GPU VOLTAGE - 1175000 - 0
<1>[ 309.714416] GPU VOLTAGE - 1075000 - 0
<1>[ 309.721282] GPU VOLTAGE - 1175000 - 0
<1>[ 309.753601] GPU VOLTAGE - 1075000 - 0
<1>[ 309.775024] GPU VOLTAGE - 1175000 - 0
<1>[ 309.803375] GPU VOLTAGE - 1075000 - 0
<4>[ 310.046813] faux123: user voltage table modified!
<4>[ 310.050994] faux123: user voltage table modified!
<4>[ 310.055694] faux123: user voltage table modified!
<4>[ 310.060852] faux123: user voltage table modified!
<4>[ 310.065063] faux123: user voltage table modified!
<4>[ 310.069946] faux123: user voltage table modified!
<4>[ 310.074462] faux123: user voltage table modified!
<4>[ 310.080017] faux123: user voltage table modified!
<4>[ 310.083953] faux123: user voltage table modified!
<4>[ 310.091339] faux123: user voltage table modified!
<4>[ 310.095458] faux123: user voltage table modified!
<4>[ 310.100036] faux123: user voltage table modified!
<4>[ 310.104766] faux123: user voltage table modified!
<4>[ 310.109405] faux123: user voltage table modified!
<4>[ 310.114013] faux123: user voltage table modified!
<4>[ 310.119079] faux123: user voltage table modified!
<4>[ 310.123474] faux123: user voltage table modified!
<4>[ 310.128204] faux123: user voltage table modified!
<6>[ 310.521881] msm_thermal: rescheduling...
<6>[ 310.524871] msm_thermal: enabled = 1
<6>[ 314.111175] msm_enqueue: queue eventdata new max is 1
<6>[ 314.159362] msm_enqueue: queue control new max is 1
<6>[ 314.177581] vfe32_proc_general: rdi interface: 2
<6>[ 314.262878] lm3560 0-0053: lm3560_resume: Reinit lm3560 chip.
<6>[ 314.268280] lm3560 0-0053: lm3560_resume: Resumed lm3560 driver.
<3>[ 314.416748] msm_ispif_release: ispif invalid state 1
<6>[ 315.427032] msm_enqueue: queue eventdata new max is 1
<6>[ 315.467773] msm_enqueue: queue control new max is 1
<6>[ 315.482910] vfe32_proc_general: rdi interface: 2
<3>[ 315.609374] msm_ispif_release: ispif invalid state 1
<6>[ 317.006988] lm3560 0-0053: lm3560_suspend: Suspended lm3560 driver.
<3>[ 317.608703] ACDB=> get_hw_delay: Path = 0 samplerate = 48000 usec = 0 status 0
<3>[ 317.615386] afe_callback: cmd = 0x100dc returned error = 0x3
<3>[ 317.621063] afe_send_hw_delay: config cmd failed
<6>[ 320.937805] SLIM_CL: skip reconfig sequence
<6>[ 321.446960] EXT4-fs (mmcblk0p24): re-mounted. Opts: (null)
<6>[ 321.460937] EXT4-fs (mmcblk0p24): re-mounted. Opts: (null)
<6>[ 321.477233] EXT4-fs (mmcblk0p24): re-mounted. Opts: (null)
<6>[ 321.686584] EXT4-fs (mmcblk0p24): re-mounted. Opts: (null)
<6>[ 321.713806] EXT4-fs (mmcblk0p24): re-mounted. Opts: (null)
<6>[ 321.729675] EXT4-fs (mmcblk0p24): re-mounted. Opts: (null)
<4>[ 327.691772] set_usb_max_current: setting current max to 1500
<3>[ 329.090393] ACDB=> get_hw_delay: Path = 0 samplerate = 48000 usec = 0 status 0
<3>[ 329.097045] afe_callback: cmd = 0x100dc returned error = 0x3
<3>[ 329.102386] afe_send_hw_delay: config cmd failed
<3>[ 330.010833] init: untracked pid 5899 exited
<3>[ 330.103759] init: untracked pid 6029 exited
<3>[ 330.426666] init: untracked pid 7101 exited
<3>[ 330.651733] init: untracked pid 7103 exited
<6>[ 332.366607] SLIM_CL: skip reconfig sequence
<3>[ 335.851287] init: untracked pid 5904 exited
<3>[ 335.897979] init: untracked pid 5891 exited
<3>[ 337.900054] ACDB=> get_hw_delay: Path = 0 samplerate = 48000 usec = 0 status 0
<3>[ 337.907196] afe_callback: cmd = 0x100dc returned error = 0x3
<3>[ 337.912109] afe_send_hw_delay: config cmd failed
<3>[ 338.625061] init: untracked pid 7206 exited
<3>[ 338.861480] init: untracked pid 7208 exited
<6>[ 341.172180] SLIM_CL: skip reconfig sequence
<3>[ 341.846649] wlan: [1140:E :HDD] hdd_tx_rx_pkt_cnt_stat_timer_handler: Disable split scan
<3>[ 342.284057] ACDB=> get_hw_delay: Path = 0 samplerate = 48000 usec = 0 status 0
<3>[ 342.290649] afe_callback: cmd = 0x100dc returned error = 0x3
<3>[ 342.296234] afe_send_hw_delay: config cmd failed
<3>[ 344.578887] init: untracked pid 6010 exited
<6>[ 345.555358] SLIM_CL: skip reconfig sequence
<3>[ 348.026702] ACDB=> get_hw_delay: Path = 0 samplerate = 48000 usec = 0 status 0
<3>[ 348.033447] afe_callback: cmd = 0x100dc returned error = 0x3
<3>[ 348.039062] afe_send_hw_delay: config cmd failed
<6>[ 351.316650] SLIM_CL: skip reconfig sequence
<3>[ 366.727294] ACDB=> get_hw_delay: Path = 0 samplerate = 48000 usec = 0 status 0
<3>[ 366.734039] afe_callback: cmd = 0x100dc returned error = 0x3
<3>[ 366.739715] afe_send_hw_delay: config cmd failed

Hope this helps in helping me (us)! :crying: