[Motorola Droid 4] lucize:
I had a black screen recently (maybe after adding this: http://review.omapzoom.org/#/c/18790/ ), but it was after pressing the power button in a short period of time for off-on-off-on and it remained black with onscreen buttons on, after that I got a soft reboot

this is the dmesg:

6>[31160.334289] Mapphone Display is ENABLE
<6>[31160.338684] atmxt_set_ic_state: IC state SLEEP -> ACTIVE
<6>[31160.340087] DSSCOMP: dsscomp_late_resume
<6>[31160.346435] lm3532_early_resume: resumed
<6>[31160.354949] atmxt_message_handler6: Touch IC is calibrating.
<6>[31160.363525] atmxt_message_handler6: Touch IC calibration complete.
<6>[31160.382507] Panel is turned on
<6>[31160.591918] lm3532_bl_work: Display backlight enabled
<6>[31171.484405] healthd: battery l=80 v=4124 t=25.0 h=2 st=3 chg=
<6>[31189.947448] request_suspend_state: sleep (0->3) at 31189879820024 (2014-02-17 12:52:11.398382314 UTC)
<6>[31189.948120] lm3532_early_suspend: suspended
<6>[31189.949127] DSSCOMP: dsscomp_early_suspend
<6>[31189.950256] DSSCOMP: blanked screen
<6>[31189.951019] atmxt_set_ic_state: IC state ACTIVE -> SLEEP
<6>[31220.308715] SysRq : Show Blocked State
<6>[31220.309265] task PC stack pid father
<5>[31220.515930] Sched Debug Version: v0.10, 3.0.31-g79c9f89-dirty #1
<5>[31220.516448] ktime : 31220448.334697
<5>[31220.516937] sched_clk : 31220515.930175
<5>[31220.517211] cpu_clk : 31220515.930175
<5>[31220.517730] jiffies : 3957815
<5>[31220.518005]
<5>[31220.518249] sysctl_sched
<5>[31220.518737] .sysctl_sched_latency : 10.000000
<5>[31220.519042] .sysctl_sched_min_granularity : 1.500000
<5>[31220.519531] .sysctl_sched_wakeup_granularity : 2.000000
<5>[31220.519805] .sysctl_sched_child_runs_first : 0
<5>[31220.520324] .sysctl_sched_features : 15471
<5>[31220.520599] .sysctl_sched_tunable_scaling : 1 (logaritmic)
<5>[31220.521087]
<5>[31220.521118] cpu#0
<5>[31220.521636] .nr_running : 1
<5>[31220.521881] .load : 691
<5>[31220.522399] .nr_switches : 11498265
<5>[31220.522674] .nr_load_updates : 590027
<5>[31220.523162] .nr_uninterruptible : 4294967113
<5>[31220.523437] .next_balance : 3.957805
<5>[31220.523925] .curr->pid : 1260
<5>[31220.524200] .clock : 31220301.971434
<5>[31220.524719] .cpu_load[0] : 691
<5>[31220.524993] .cpu_load[1] : 605
<5>[31220.525482] .cpu_load[2] : 400
<5>[31220.525756] .cpu_load[3] : 229
<5>[31220.526031] .cpu_load[4] : 123
<5>[31220.526519] .yld_count : 458
<5>[31220.526794] .sched_switch : 0
<5>[31220.527282] .sched_count : 11978211
<5>[31220.527557] .sched_goidle : 1267682
<5>[31220.528045] .avg_idle : 1000000
<5>[31220.528320] .ttwu_count : 7603546
<5>[31220.528594] .ttwu_local : 5684497
<5>[31220.529083]
<5>[31220.529113] cfs_rq[0]:/apps
<5>[31220.529632] .exec_clock : 1060431.702570
<5>[31220.530120] .MIN_vruntime : 0.000001
<5>[31220.530395] .min_vruntime : 25885052.790678
<5>[31220.530914] .max_vruntime : 0.000001
<5>[31220.531188] .spread : 0.000000
<5>[31220.531677] .spread0 : 598310.707361
<5>[31220.531951] .nr_spread_over : 35284
<5>[31220.532440] .nr_running : 1
<5>[31220.532714] .load : 1024
<5>[31220.532989] .load_avg : 4712.187343
<5>[31220.533477] .load_period : 6.059036
<5>[31220.533752] .load_contrib : 777
<5>[31220.534271] .load_tg : 1084
<5>[31220.534545] .se->exec_start : 31220301.971434
<5>[31220.535034] .se->vruntime : 25286742.083317
<5>[31220.535308] .se->sum_exec_runtime : 1060437.439887
<5>[31220.535797] .se->statistics.wait_start : 0.000000
<5>[31220.536071] .se->statistics.sleep_start : 0.000000
<5>[31220.536560] .se->statistics.block_start : 0.000000
<5>[31220.536834] .se->statistics.sleep_max : 0.000000
<5>[31220.537353] .se->statistics.block_max : 0.000000
<5>[31220.537628] .se->statistics.exec_max : 17.578125
<5>[31220.538116] .se->statistics.slice_max : 88.043213
<5>[31220.538391] .se->statistics.wait_max : 125.732421
<5>[31220.538665] .se->statistics.wait_sum : 105652.892224
<5>[31220.539184] .se->statistics.wait_count : 5457987
<5>[31220.539428] .se->load.weight : 691
<5>[31220.539947]
<5>[31220.539947] cfs_rq[0]:/
<5>[31220.540466] .exec_clock : 1502660.758450
<5>[31220.540985] .MIN_vruntime : 0.000001
<5>[31220.541259] .min_vruntime : 25286742.083317
<5>[31220.541748] .max_vruntime : 0.000001
<5>[31220.542022] .spread : 0.000000
<5>[31220.542510] .spread0 : 0.000000
<5>[31220.542785] .nr_spread_over : 5284
<5>[31220.543060] .nr_running : 1
<5>[31220.543334] .load : 691
<5>[31220.543609] .load_avg : 0.000000
<5>[31220.544128] .load_period : 0.000000
<5>[31220.544403] .load_contrib : 0
<5>[31220.544891] .load_tg : 0
<5>[31220.545166]
<5>[31220.545166] cfs_rq[0]:/apps/bg_non_interactive
<5>[31220.545898] .exec_clock : 386446.075360
<5>[31220.546173] .MIN_vruntime : 0.000001
<5>[31220.546661] .min_vruntime : 2501769.631910
<5>[31220.546936] .max_vruntime : 0.000001
<5>[31220.547424] .spread : 0.000000
<5>[31220.547698] .spread0 : -22784972.451407
<5>[31220.547973] .nr_spread_over : 34836
<5>[31220.548461] .nr_running : 0
<5>[31220.548736] .load : 0
<5>[31220.549224] .load_avg : 2559.999744
<5>[31220.549499] .load_period : 7.237853
<5>[31220.549987] .load_contrib : 353
<5>[31220.550262] .load_tg : 353
<5>[31220.550750] .se->exec_start : 31220276.885985
<5>[31220.551025] .se->vruntime : 25885039.388579
<5>[31220.551513] .se->sum_exec_runtime : 386457.488923
<5>[31220.551788] .se->statistics.wait_start : 0.000000
<5>[31220.552276] .se->statistics.sleep_start : 0.000000
<5>[31220.552551] .se->statistics.block_start : 0.000000
<5>[31220.552825] .se->statistics.sleep_max : 0.000000
<5>[31220.553314] .se->statistics.block_max : 0.000000
<5>[31220.553588] .se->statistics.exec_max : 8.666992
<5>[31220.554077] .se->statistics.slice_max : 248.931885
<5>[31220.554351] .se->statistics.wait_max : 568.267822
<5>[31220.554840] .se->statistics.wait_sum : 291794.921617
<5>[31220.555114] .se->statistics.wait_count : 1392480
<5>[31220.555603] .se->load.weight : 2
<5>[31220.555877]
<5>[31220.555908] rt_rq[0]:/apps/bg_non_interactive
<5>[31220.556640] .rt_nr_running : 0
<5>[31220.556915] .rt_throttled : 0
<5>[31220.557189] .rt_time : 0.000000
<5>[31220.557678] .rt_runtime : 700.000000
<5>[31220.557952]
<5>[31220.557952] rt_rq[0]:/apps
<5>[31220.558685] .rt_nr_running : 0
<5>[31220.558959] .rt_throttled : 0
<5>[31220.559448] .rt_time : 0.000000
<5>[31220.559722] .rt_runtime : 800.000000
<5>[31220.560180]
<5>[31220.560211] rt_rq[0]:/
<5>[31220.560699] .rt_nr_running : 0
<5>[31220.560974] .rt_throttled : 0
<5>[31220.561462] .rt_time : 0.091553
<5>[31220.561737] .rt_runtime : 950.000000
<5>[31220.562225]
<5>[31220.562255] runnable tasks:
<5>[31220.562255] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
<5>[31220.562286] ----------------------------------------------------------------------------------------------------------
<5>[31220.563842] R watchdog 1260 25885052.790678 3545 120 25885052.790678 622.894300 31099166.473383 /apps
<5>[31220.565643]
<5>[31220.565643] cpu#1
<5>[31220.566162] .nr_running : 0
<5>[31220.566650] .load : 0
<5>[31220.566925] .nr_switches : 9831913
<5>[31220.567199] .nr_load_updates : 435298
<5>[31220.567687] .nr_uninterruptible : 183
<5>[31220.567962] .next_balance : 3.957766
<5>[31220.568450] .curr->pid : 0
<5>[31220.568725] .clock : 31220565.917968
<5>[31220.569213] .cpu_load[0] : 0
<5>[31220.569488] .cpu_load[1] : 0
<5>[31220.569763] .cpu_load[2] : 0
<5>[31220.570251] .cpu_load[3] : 0
<5>[31220.570526] .cpu_load[4] : 0
<5>[31220.571014] .yld_count : 1347
<5>[31220.571289] .sched_switch : 0
<5>[31220.571777] .sched_count : 10239967
<5>[31220.572052] .sched_goidle : 977960
<5>[31220.572326] .avg_idle : 1000000
<5>[31220.572814] .ttwu_count : 5150599
<5>[31220.573089] .ttwu_local : 3771279
<5>[31220.573577]
<5>[31220.573577] cfs_rq[1]:/apps
<5>[31220.574096] .exec_clock : 1101518.494496
<5>[31220.574584] .MIN_vruntime : 0.000001
<5>[31220.574859] .min_vruntime : 26167934.855983
<5>[31220.575347] .max_vruntime : 0.000001
<5>[31220.575622] .spread : 0.000000
<5>[31220.576110] .spread0 : 881192.772666
<5>[31220.576385] .nr_spread_over : 35750
<5>[31220.576873] .nr_running : 0
<5>[31220.577148] .load : 0
<5>[31220.577423] .load_avg : 60999.993900
<5>[31220.577911] .load_period : 9.999999
<5>[31220.578186] .load_contrib : 6099
<5>[31220.578674] .load_tg : 6876
<5>[31220.578918] .se->exec_start : 31220565.917968
<5>[31220.579406] .se->vruntime : 25495925.672692
<5>[31220.579711] .se->sum_exec_runtime : 1101529.267213
<5>[31220.580200] .se->statistics.wait_start : 0.000000
<5>[31220.580474] .se->statistics.sleep_start : 0.000000
<5>[31220.580963] .se->statistics.block_start : 0.000000
<5>[31220.581237] .se->statistics.sleep_max : 0.000000
<5>[31220.581695] .se->statistics.block_max : 0.000000
<5>[31220.581970] .se->statistics.exec_max : 10.528564
<5>[31220.582244] .se->statistics.slice_max : 37.261963
<5>[31220.582733] .se->statistics.wait_max : 336.059570
<5>[31220.583007] .se->statistics.wait_sum : 82713.775042
<5>[31220.583496] .se->statistics.wait_count : 8276438
<5>[31220.583770] .se->load.weight : 2
<5>[31220.584259]
<5>[31220.584259] cfs_rq[1]:/
<5>[31220.584777] .exec_clock : 1296124.601563
<5>[31220.585266] .MIN_vruntime : 0.000001
<5>[31220.585540] .min_vruntime : 25495927.667379
<5>[31220.586029] .max_vruntime : 0.000001
<5>[31220.586303] .spread : 0.000000
<5>[31220.586578] .spread0 : 209185.584062
<5>[31220.587066] .nr_spread_over : 7438
<5>[31220.587341] .nr_running : 0
<5>[31220.587829] .load : 0
<5>[31220.588073] .load_avg : 0.000000
<5>[31220.588562] .load_period : 0.000000
<5>[31220.588836] .load_contrib : 0
<5>[31220.589324] .load_tg : 0
<5>[31220.589599]
<5>[31220.589599] rt_rq[1]:/apps/bg_non_interactive
<5>[31220.590118] .rt_nr_running : 0
<5>[31220.590606] .rt_throttled : 0
<5>[31220.590881] .rt_time : 0.000000
<5>[31220.591369] .rt_runtime : 700.000000
<5>[31220.591644]
<5>[31220.591644] rt_rq[1]:/apps
<5>[31220.592376] .rt_nr_running : 0
<5>[31220.592651] .rt_throttled : 0
<5>[31220.592926] .rt_time : 0.000000
<5>[31220.593383] .rt_runtime : 800.000000
<5>[31220.593658]
<5>[31220.593688] rt_rq[1]:/
<5>[31220.594421] .rt_nr_running : 0
<5>[31220.594665] .rt_throttled : 0
<5>[31220.594940] .rt_time : 0.061035
<5>[31220.595458] .rt_runtime : 950.000000
<5>[31220.595733]
<5>[31220.595733] runnable tasks:
<5>[31220.595733] task PID tree-key switches prio exec-runtime sum-exec sum-sleep
<5>[31220.595764] ----------------------------------------------------------------------------------------------------------
<5>[31220.597747]
<6>[31221.587097] binder: release 766:766 transaction 1478042 out, still active
<6>[31221.587463] binder: release 766:5354 transaction 1477949 out, still active
<6>[31221.997650] alarm_release: clear alarm, pending 0
<6>[31222.807220] request_suspend_state: wakeup (3->0) at 31222739622262 (2014-02-17 12:52:44.258184552 UTC)
<6>[31222.808074] DSI: dsi_vc_cmd = 0, dsi_vc_video = 1
<6>[31222.808105] DT: x_res=540 y_res=960 phy_w_mm=50 phy_h_mm=89
<6>[31222.808105] DT: hfp=0 hsw=2 hbp=2 vfp=0 vsw=1 vbp=1
<6>[31222.808135] DT: clk_lane=1 clk_pos=0 d1_lane=2 d1_pos=0 d2_lane=3 d2_pos=0
<6>[31222.808135] DT: d3_lane=0 d3_pos=0 d4_lane=0 d4_pos=0
<6>[31222.808135] DT: panel_id=0x90004 type= 0
<6>[31222.808166] DT: regn=13 regm=230 regm3=6 regm4=6 lp_clk_div=9 lck_div=1 pck_div=4
<6>[31222.808166] DT: te_support=1, te_type=0
<6>[31222.808197] DT: number of power supplies=1
<6>[31222.808197] DT: Supply #0, reg name=sw5, gpio=96, gpio_en_val=1
<3>[31222.966278] init: untracked pid 1464 exited
<6>[31222.966949] binder: release 756:1428 transaction 1477949 in, still active
<6>[31222.966979] binder: send failed reply for transaction 1477949, target dead
<6>[31222.966979] binder: release 756:5722 transaction 1478042 in, still active
<6>[31222.967010] binder: send failed reply for transaction 1478042, target dead
<6>[31222.967010] binder: release 756:6899 transaction 1474129 in, still active
<6>[31222.967041] binder: send failed reply for transaction 1474129, target dead
<6>[31222.967041] binder: release 756:17212 transaction 1478625 in, still active
<6>[31222.967071] binder: send failed reply for transaction 1478625 to 17198:17198
<3>[31222.969177] init: untracked pid 1334 exited
<3>[31222.981536] init: untracked pid 1353 exited
<6>[31223.122955] Mapphone Display is ENABLE
<6>[31223.138000] atmxt_set_ic_state: IC state SLEEP -> ACTIVE
<3>[31223.138977] init: untracked pid 1345 exited
<6>[31223.139190] DSSCOMP: dsscomp_late_resume
<6>[31223.143585] lm3532_early_resume: resumed
<6>[31223.152343] atmxt_message_handler6: Touch IC is calibrating.
<6>[31223.160858] atmxt_message_handler6: Touch IC calibration complete.
<6>[31223.187896] Panel is turned on
<6>[31223.396301] lm3532_bl_work: Display backlight enabled
<6>[31223.854370] rpmsg_omx rpmsg-omx1: local addr assigned: 0x401
<4>[31223.874176] omap_hwmod: ipu: failed to hardreset
<6>[31224.006622] rpmsg_omx rpmsg7: conn rsp: status 0 addr 101
<6>[31224.546020] rpmsg_omx rpmsg-omx1: Disconnecting from OMX service at 101
<3>[31225.184051] init: untracked pid 8032 exited
<3>[31226.161743] init: untracked pid 2931 exited
<3>[31226.224395] init: untracked pid 4351 exited
<3>[31226.224853] init: untracked pid 7925 exited
<3>[31226.225128] init: untracked pid 8073 exited