Tegra tk1 freez display

Hi!
i have my custom board having tk1 processor. but i am getting problem in one of my boards that its display freezes randomly.
and some times is send logs on serial that are like this. so what can be the problem that it freeze everything

[   83.361931] Unable to handle kernel NULL pointer dereference at virtual address 00000040
[   83.370061] pgd = e9e34000
[   83.372775] [00000040] *pgd=a9f31831, *pte=00000000, *ppte=00000000
[   83.379120] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM
[   83.385029] Modules linked in: dm_crypt dm_mod joydev bnep rfcomm bluetooth rfkill nvhost_vi
[   83.393540] CPU: 0 PID: 1711 Comm: compiz Tainted: G        W    3.10.40 #138
[   83.400662] task: e9ff2a80 ti: e98c4000 task.ti: e98c4000
[   83.406052] PC is at 0x40
[   83.408673] LR is at unlazy_walk+0x7c/0x204
[   83.412848] pc : [<00000040>]    lr : [<c0158604>]    psr: 600f0033
[   83.412848] sp : e98c5ef8  ip : 72705f68  fp : 00000000
[   83.424303] r10: eab65a40  r9 : edfeacc8  r8 : ee01d450
[   83.429517] r7 : c015ad4c  r6 : ea179031  r5 : 00000019  r4 : 62a08059
[   83.436031] r3 : 00000000  r2 : 00000002  r1 : 00000000  r0 : fffffff6
[   83.442547] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA Thumb  Segment user
[   83.449840] Control: 10c5387d  Table: a9e3406a  DAC: 00000015
[   83.455573]
[   83.455573] LR: 0xc0158584:
[   83.459833] 8584  ea1abf4d e92d47f0 e24dd008 e52de004 e8bd4000 e1a0300d e3c33d7f e5902024
[   83.468075] 85a4  e3c3303f e5909004 e593300c e3120040 e59373d8 0a000022 e5903018 e1a05001
[   83.476313] 85c4  e1a04000 e3530000 0a000001 e3120a02 0a00000f e3a08000 e2896054 e1a00006
[   83.484550] 85e4  eb1ac755 e3550000 0a000016 e5953010 e1590003 0a000038 e1a00006 eb1ac843
[   83.492789] 8604  e3580000 03e00009 1a00005c e28dd008 e8bd87f0 e2876004 e1a00006 eb1ac746
[   83.501026] 8624  e5942018 e5973014 e1520003 0a000046 e1a00006 eb1ac835 e3e00009 e28dd008
[   83.509263] 8644  e8bd87f0 e7f001f2 e5993054 e5941028 e58d3000 e6ff2073 e1520823 0a000040
[   83.517498] 8664  f57ff05f e5993004 e1510003 1affffe1 e5993050 e5992028 e2833001 e5893050
[   83.525737]
[   83.525737] SP: 0xe98c5e78:
[   83.529997] 5e78  00000000 c01473c0 ee01d450 eabc4c40 eabc6da0 00000001 ea179000 ea179000
[   83.538234] 5e98  00000040 600f0033 ffffffff e98c5ee4 ee01d450 c000ec78 fffffff6 00000000
[   83.546472] 5eb8  00000002 00000000 62a08059 00000019 ea179031 c015ad4c ee01d450 edfeacc8
[   83.554708] 5ed8  eab65a40 00000000 72705f68 e98c5ef8 c0158604 00000040 600f0033 ffffffff
[   83.562946] 5ef8  00000002 00000000 00000000 c01473c0 ee000dc0 c01473c0 6708ba77 00000013
[   83.571185] 5f18  ffffffff 00000010 e9ff2a80 e9ff2a80 00000001 004b1758 ffffff9c 004b1758
[   83.579421] 5f38  00000010 c015db68 00000000 004b1758 ffffff9c c014baa8 e98c5fb0 00000000
[   83.587660] 5f58  eb41f240 e9d445c0 ee01d450 eabc4c40 00000000 00000010 004b1758 0045a68c
[   83.595896]
[   83.595896] R6: 0xea178fb1:
[   83.600155] 8fb0  ee8dce7e 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   83.608393] 8fd0  00000000 00000000 00000000 00000000 de3b1e7f ebb17c7f f53a3e7e f53a4e7e
[   83.616631] 8ff0  00000000 00000000 00000000 00000000 ea179010 004b1758 00000000 00000000
[   83.624870] 9010  7273752f 6168732f 742f6572 656d6568 6d412f73 6e616962 752f6563 7974696e
[   83.633106] 9030  6e696d2f 7a696d69 61645f65 705f6873 73736572 732e6465 73006776 00000067
[   83.641342] 9050  65737365 76732e64 73000067 00006776 00656369 65630065 00000000 6e696775
[   83.649580] 9070  006f732e 00006f73 00000000 00000000 00000000 00000000 00000000 00000000
[   83.657817] 9090  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   83.666054] 90b0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   83.674292]
[   83.674292] R7: 0xc015accc:
[   83.678551] accc  e3c33d7f 0a000029 e3c3303f e305084c e593300c e34c00c7 e59353d8 ebfce8f4
[   83.686788] acec  ebfcb880 e285c01c e5953008 e3130001 1a000058 f57ff05f e89c0003 e8840003
[   83.695024] ad0c  e1a0e001 e5912004 e3120001 1a00003c e5842028 f57ff05f e5952008 e1520003
[   83.703260] ad2c  0affffd5 eaffffef e3150040 0a00001d e305084c e34c00c7 ebfce8dd ebfcb869
[   83.711499] ad4c  e5943018 e3530000 12845018 0a000042 e8950003 e8840003 eaffffc7 e1a00004
[   83.719736] ad6c  ebfff545 e1a00005 e28dd00c e8bd83f0 e3c3303f e593300c e59353d8 e2856004
[   83.727974] ad8c  e285501c e1a00006 eb1abd69 e8950003 e8840003 e1a00004 ebfff537 e1a00006
[   83.736212] adac  eb1abe58 eaffffb4 e1a0300d e2845018 e3c33d7f e3c3303f e593300c e59363d8
[   83.744448]
[   83.744448] R8: 0xee01d3d0:
[   83.748706] d3d0  ee01d3cc ee01d3d4 ee01d3d4 ee01d3dc ee01d3dc 00000000 ee013640 e9b5ba40
[   83.756946] d3f0  00000000 00000000 0000001c 00000000 00000000 00000000 00000000 04040000
[   83.765184] d410  40400050 08430000 05040000 21a00020 00400000 04000000 00000000 81814080
[   83.773422] d430  00000000 12000000 00080000 02010200 ee01aa78 ee01aa78 ee01db00 edc01800
[   83.781659] d450  edfeacc8 ed0a3400 00000020 fdb8f2d8 ee01dca8 e9be9be8 ee01db20 ee01db20
[   83.789896] d470  ed0a346c ed0a346c ed5a35c0 ee01dcbc ee01db3c ee01d484 ee01d484 ee01d48c
[   83.798132] d490  ee01d48c ee01d494 ee01d494 ee01d49c ee01d49c 00000000 ee013640 edb0f340
[   83.806370] d4b0  00000000 00000000 0000000c 00000000 00000000 00000000 00000000 00000040
[   83.814609]
[   83.814609] R9: 0xedfeac48:
[   83.818867] ac48  00000000 c1e34454 eddaf090 00000000 17eaeb02 00000004 edfeac6c 000200d2
[   83.827105] ac68  edfe9978 746f6f72 4042ac00 0050ac70 00000000 2800ac7c 4014ac7c 00000000
[   83.835341] ac88  00000000 00000000 00000001 000c000c c082cec0 ee01fc00 00000000 00000000
[   83.843579] aca8  edfeaca8 edfeaca8 edfeae48 eddaf108 edfeacb8 edfeacb8 00000000 edfe9a24
[   83.851816] acc8  00000000 00000002 00000000 00000000 edfeacc8 33428efe 00000000 00000001
[   83.860053] ace8  edfeacf4 00000000 edfeda40 746f002f 00000000 00000000 00000000 00000000
[   83.868291] ad08  00000001 00000000 edfead10 00fead10 000000c6 b687b687 00000000 ed0a3400
[   83.876528] ad28  00000000 00000000 edfead30 edfead30 edfead38 edfead38 eab15c28 edfeadc0
[   83.884767]
[   83.884767] R10: 0xeab659c0:
[   83.889114] 59c0  00000000 00000000 00000001 000027c5 00000000 00000000 00000000 00000000
[   83.897352] 59e0  00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[   83.905587] 5a00  00000000 00000000 00000000 00080000 00000000 00020002 eab65a18 eab65a18
[   83.913826] 5a20  eab65a20 eab65a20 00001000 00000000 00000000 000e000e eab65a38 eab65a38
[   83.922063] 5a40  000741ed 00000000 00000000 00000000 00000000 ffffffff c0831ec0 ed0a3400
[   83.930301] 5a60  eab65b14 00001543 00000002 00000000 00001000 00000000 5cd4164d 3633865e
[   83.938536] 5a80  551c782e 00000000 5cd4164d 3895e05e 00090009 00000000 0000000c 00000000
[   83.946774] 5aa0  00000008 00000000 00000002 00000000 00000001 00000000 eab65ab8 eab65ab8
[   83.955015] Process compiz (pid: 1711, stack limit = 0xe98c4238)
[   83.961009] Stack: (0xe98c5ef8 to 0xe98c6000)
[   83.965357] 5ee0:                                                       00000002 00000000
[   83.973520] 5f00: 00000000 c01473c0 ee000dc0 c01473c0 6708ba77 00000013 ffffffff 00000010
[   83.981683] 5f20: e9ff2a80 e9ff2a80 00000001 004b1758 ffffff9c 004b1758 00000010 c015db68
[   83.989845] 5f40: 00000000 004b1758 ffffff9c c014baa8 e98c5fb0 00000000 eb41f240 e9d445c0
[   83.998008] 5f60: ee01d450 eabc4c40 00000000 00000010 004b1758 0045a68c 004b1758 00000000
[   84.006170] 5f80: e98c4000 00000000 00050da8 c014bd24 00000010 004b1758 0045a68c 00000021
[   84.014333] 5fa0: c000f144 c000efa0 00000010 004b1758 004b1758 00000000 80000000 004b1758
[   84.022495] 5fc0: 00000010 004b1758 0045a68c 00000021 bee58fbc bee58fc0 bee5903c 00050da8
[   84.030657] 5fe0: b6afd284 bee58f04 b6a5fbed b6d2ef26 400f0030 004b1758 00000000 00000000
[   84.038829] [<c0158604>] (unlazy_walk+0x7c/0x204) from [<00000010>] (0x10)
[   84.045692] Code: bad PC value
[   84.048850] ---[ end trace f24ae9821990dced ]---
[   84.068536] note: compiz[1711] exited with preempt_count 2
[  105.076379] INFO: rcu_preempt detected stalls on CPUs/tasks: {} (detected by 0, t=21002 jiffies, g=5286, c=5285, q=29)
[  105.087097] INFO: Stall ended before state dump start
[  132.081378] BUG: soft lockup - CPU#0 stuck for 23s! [rs:main Q:Reg:458]
[  132.087979] Modules linked in: dm_crypt dm_mod joydev bnep rfcomm bluetooth rfkill nvhost_vi
[  132.096485]
[  132.097976] CPU: 0 PID: 458 Comm: rs:main Q:Reg Tainted: G      D W    3.10.40 #138
[  132.105619] task: ec231540 ti: eb80e000 task.ti: eb80e000
[  132.111015] PC is at lg_local_lock+0x54/0x68
[  132.115280] LR is at path_init+0x1e8/0x3e8
[  132.119368] pc : [<c0095114>]    lr : [<c015ad48>]    psr: 80070013
[  132.119368] sp : eb80fe40  ip : 00000001  fp : 0007c748
[  132.130825] r10: fffff000  r9 : 00000000  r8 : ffffff9c
[  132.136039] r7 : ea209010  r6 : ea209010  r5 : 00000051  r4 : eb80fed0
[  132.142552] r3 : 00001995  r2 : c1df52e4  r1 : 00001996  r0 : 00000000
[  132.149067] Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment user
[  132.156187] Control: 10c5387d  Table: ab55806a  DAC: 00000015
[  132.161921]
[  132.161921] PC: 0xc0095094:
[  132.166180] 5094  ebfffe4a eaffffbb e3e07015 eaffffb9 e3e07000 eaffffb7 e3e0700b eaffffb5
[  132.174421] 50b4  e52de004 e8bd4000 e12fff1e e52de004 e8bd4000 e1a0300d e3c33d7f e3c3303f
[  132.182661] 50d4  e5932004 e2822001 e5832004 e5902000 ee1d3f90 e0822003 e1923f9f e2831801
[  132.190898] 50f4  e1820f91 e3300000 1afffffa e1a01823 e6ff3073 e1530001 0a000003 e320f002
[  132.199134] 5114  e1d230b0 e1530001 1afffffb f57ff05f e12fff1e e52de004 e8bd4000 e1a0300d
[  132.207371] 5134  e3c33d7f e3c3303f e5932004 e2822001 e5832004 e30e34e8 e5902000 e34c30bd
[  132.215611] 5154  e7933101 e0822003 e1923f9f e2831801 e1820f91 e3300000 1afffffa e1a01823
[  132.223851] 5174  e6ff3073 e1530001 0a000003 e320f002 e1d230b0 e1530001 1afffffb f57ff05f
[  132.232091]
[  132.232091] LR: 0xc015acc8:
[  132.236350] acc8  e1a0300d e3c33d7f 0a000029 e3c3303f e305084c e593300c e34c00c7 e59353d8
[  132.244585] ace8  ebfce8f4 ebfcb880 e285c01c e5953008 e3130001 1a000058 f57ff05f e89c0003
[  132.252820] ad08  e8840003 e1a0e001 e5912004 e3120001 1a00003c e5842028 f57ff05f e5952008
[  132.261055] ad28  e1520003 0affffd5 eaffffef e3150040 0a00001d e305084c e34c00c7 ebfce8dd
[  132.269295] ad48  ebfcb869 e5943018 e3530000 12845018 0a000042 e8950003 e8840003 eaffffc7
[  132.277531] ad68  e1a00004 ebfff545 e1a00005 e28dd00c e8bd83f0 e3c3303f e593300c e59353d8
[  132.285767] ad88  e2856004 e285501c e1a00006 eb1abd69 e8950003 e8840003 e1a00004 ebfff537
[  132.294006] ada8  e1a00006 eb1abe58 eaffffb4 e1a0300d e2845018 e3c33d7f e3c3303f e593300c
[  132.302247]
[  132.302247] SP: 0xeb80fdc0:
[  132.306506] fdc0  0000001d fdc4200c c0bde678 c00084f8 c015ad48 c0095114 80070013 ffffffff
[  132.314744] fde0  eb80fe2c ffffff9c 00000000 fffff000 0007c748 c000eb80 00000000 00001996
[  132.322981] fe00  c1df52e4 00001995 eb80fed0 00000051 ea209010 ea209010 ffffff9c 00000000
[  132.331220] fe20  fffff000 0007c748 00000001 eb80fe40 c015ad48 c0095114 80070013 ffffffff
[  132.339457] fe40  ec433bc8 c0190fc4 eb80fe74 eb80fed0 00000001 00000041 ea209010 ffffff9c
[  132.347693] fe60  00000000 c015af7c eb80fe78 e90ec428 ec433be0 c01473c0 00000000 c01473c0
[  132.355931] fe80  00000000 ed506114 c081c760 00000001 ea209000 ea209000 00000001 ffffff9c
[  132.364167] fea0  eb80fed0 ffffff9c 00000000 fffff000 0007c748 c015b7b8 ea209000 00000001
[  132.372407]
[  132.372407] R2: 0xc1df5264:
[  132.376666] 5264  00010001 eb5d4f54 eb5d4f54 00000000 ffffffe0 c1df5278 c1df5278 c013b334
[  132.384902] 5284  c1df9d05 c0cdcdb0 ed05487c c0147bc4 00000000 00200200 fffcb704 c0d24803
[  132.393141] 52a4  c0084c24 c1df5284 ffffffff ffffffff 00000000 00000000 00000000 00000000
[  132.401381] 52c4  00000000 ee007500 00000004 64f064f0 00002611 00000012 00001dc7 00004030
[  132.409618] 52e4  19971995 ecc08a08 ecc08808 edfc2c48 eddd31c8 edfc7248 ecc08848 ecc10788
[  132.417858] 5304  ecc08888 0000235d 00000734 c1df5310 c1df5310 c1df5318 c1df5318 00000008
[  132.426096] 5324  ee0fce60 eb80fdf8 0000000a edc174f0 edfece70 edfecd48 edfecc20 edfecaf8
[  132.434333] 5344  edfec9d0 eaa35530 eabb74f0 eabb7618 e8c18780 00000000 516a1730 a96e8e88
[  132.442572]
[  132.442572] R4: 0xeb80fe50:
[  132.446832] fe50  00000001 00000041 ea209010 ffffff9c 00000000 c015af7c eb80fe78 e90ec428
[  132.455071] fe70  ec433be0 c01473c0 00000000 c01473c0 00000000 ed506114 c081c760 00000001
[  132.463309] fe90  ea209000 ea209000 00000001 ffffff9c eb80fed0 ffffff9c 00000000 fffff000
[  132.471545] feb0  0007c748 c015b7b8 ea209000 00000001 ffffff9c eb80ff60 ffffff9c c015db24
[  132.479784] fed0  00000000 c018e4c0 eb8913c8 00000001 00000000 ece42ad4 00000000 c0be8884
[  132.488022] fef0  00000007 00001051 b6e51014 00000001 00000000 c01473c0 ee000dc0 c01473c0
[  132.496259] ff10  00000000 00000001 00000000 b6e6d730 ec231540 ec231540 00000001 b6e7d968
[  132.504496] ff30  ffffff9c b6e6d730 00000010 c015db68 00000000 b6e7d968 ffffff9c c014baa8
[  132.512734]
[  132.512734] R6: 0xea208f90:
[  132.516992] 8f90  2d646e75 6b6e6973 2e6f732e 676b7064 77656e2d 00000000 01250030 75646f6d
[  132.525230] 8fb0  682d656c 2d707474 746f7270 6c6f636f 696e752d 6f732e78 6b70642e 656e2d67
[  132.533468] 8fd0  2e6f7377 00000000 011f002c 75646f6d 632d656c 69626d6f 732d656e 2e6b6e69
[  132.541708] 8ff0  642e6f73 2d676b70 00706d74 00000000 ea209010 b6e6d730 0080164c 00041e00
[  132.549944] 9010  7261762f 6e75722f 6d74752f 00007870 69747069 2e736e6f 666e6f63 00000000
[  132.558181] 9030  2f747369 2e737466 65646e69 65722f78 64726f63 7361622e 00004165 001a6000
[  132.566418] 9050  696c632e 00746e65 00616c2e 64742e65 00000062 401000ee 00000000 00000000
[  132.574656] 9070  00000000 00000000 00000000 00000000 00000020 00047424 210c7424 200c7580
[  132.582891]
[  132.582891] R7: 0xea208f90:
[  132.587150] 8f90  2d646e75 6b6e6973 2e6f732e 676b7064 77656e2d 00000000 01250030 75646f6d
[  132.595386] 8fb0  682d656c 2d707474 746f7270 6c6f636f 696e752d 6f732e78 6b70642e 656e2d67
[  132.603624] 8fd0  2e6f7377 00000000 011f002c 75646f6d 632d656c 69626d6f 732d656e 2e6b6e69
[  132.611861] 8ff0  642e6f73 2d676b70 00706d74 00000000 ea209010 b6e6d730 0080164c 00041e00
[  132.620099] 9010  7261762f 6e75722f 6d74752f 00007870 69747069 2e736e6f 666e6f63 00000000
[  132.628336] 9030  2f747369 2e737466 65646e69 65722f78 64726f63 7361622e 00004165 001a6000
[  132.636574] 9050  696c632e 00746e65 00616c2e 64742e65 00000062 401000ee 00000000 00000000
[  132.644811] 9070  00000000 00000000 00000000 00000000 00000020 00047424 210c7424 200c7580
[  132.653049]
[  132.653049] R10: 0xffffef80:
[  132.657395] ef80  ******** ******** ******** ******** ******** ******** ******** ********
[  132.665645] efa0  ******** ******** ******** ******** ******** ******** ******** ********
[  132.673886] efc0  ******** ******** ******** ******** ******** ******** ******** ********
[  132.682131] efe0  ******** ******** ******** ******** ******** ******** ******** ********
[  132.690376] f000  ******** ******** ******** ******** ******** ******** ******** ********
[  132.698622] f020  ******** ******** ******** ******** ******** ******** ******** ********
[  132.706863] f040  ******** ******** ******** ******** ******** ******** ******** ********
[  132.715107] f060  ******** ******** ******** ******** ******** ******** ******** ********
[  132.723353] CPU: 0 PID: 458 Comm: rs:main Q:Reg Tainted: G      D W    3.10.40 #138
[  132.731011] [<c0016794>] (unwind_backtrace+0x0/0x130) from [<c0012f80>] (show_stack+0x18/0x1c)
[  132.739614] [<c0012f80>] (show_stack+0x18/0x1c) from [<c00d6134>] (watchdog_timer_fn+0x208/0x2c0)
[  132.748474] [<c00d6134>] (watchdog_timer_fn+0x208/0x2c0) from [<c00906f8>] (__run_hrtimer+0x90/0x280)
[  132.757680] [<c00906f8>] (__run_hrtimer+0x90/0x280) from [<c009131c>] (hrtimer_interrupt+0x124/0x2e0)
[  132.766890] [<c009131c>] (hrtimer_interrupt+0x124/0x2e0) from [<c05dec88>] (arch_timer_handler_phys+0x30/0x38)
[  132.776880] [<c05dec88>] (arch_timer_handler_phys+0x30/0x38) from [<c00da16c>] (handle_percpu_devid_irq+0x8c/0x194)
[  132.787298] [<c00da16c>] (handle_percpu_devid_irq+0x8c/0x194) from [<c00d65a8>] (generic_handle_irq+0x30/0x40)
[  132.797285] [<c00d65a8>] (generic_handle_irq+0x30/0x40) from [<c000f898>] (handle_IRQ+0x48/0x98)
[  132.806057] [<c000f898>] (handle_IRQ+0x48/0x98) from [<c00084f8>] (gic_handle_irq+0x4c/0x140)
[  132.814568] [<c00084f8>] (gic_handle_irq+0x4c/0x140) from [<c000eb80>] (__irq_svc+0x40/0x70)
[  132.822989] Exception stack(0xeb80fdf8 to 0xeb80fe40)
[  132.828031] fde0:                                                       00000000 00001996
[  132.836192] fe00: c1df52e4 00001995 eb80fed0 00000051 ea209010 ea209010 ffffff9c 00000000
[  132.844353] fe20: fffff000 0007c748 00000001 eb80fe40 c015ad48 c0095114 80070013 ffffffff
[  132.852519] [<c000eb80>] (__irq_svc+0x40/0x70) from [<c0095114>] (lg_local_lock+0x54/0x68)
[  132.860773] [<c0095114>] (lg_local_lock+0x54/0x68) from [<c015ad48>] (path_init+0x1e8/0x3e8)
[  132.869201] [<c015ad48>] (path_init+0x1e8/0x3e8) from [<c015af7c>] (path_lookupat+0x34/0x848)
[  132.877714] [<c015af7c>] (path_lookupat+0x34/0x848) from [<c015b7b8>] (filename_lookup.isra.11+0x28/0x70)
[  132.887268] [<c015b7b8>] (filename_lookup.isra.11+0x28/0x70) from [<c015db24>] (user_path_at_empty+0x5c/0x84)
[  132.897168] [<c015db24>] (user_path_at_empty+0x5c/0x84) from [<c015db68>] (user_path_at+0x1c/0x24)
[  132.906115] [<c015db68>] (user_path_at+0x1c/0x24) from [<c014baa8>] (SyS_faccessat+0xb8/0x2fc)
[  132.914716] [<c014baa8>] (SyS_faccessat+0xb8/0x2fc) from [<c014bd24>] (SyS_access+0x38/0x128)
[  132.923228] [<c014bd24>] (SyS_access+0x38/0x128) from [<c000efa0>] (ret_fast_syscall+0x0/0x30)
[  160.081377] BUG: soft lockup - CPU#0 stuck for 23s! [rs:main Q:Reg:458]
[  160.087977] Modules linked in: dm_crypt dm_mod joydev bnep rfcomm bluetooth rfkill nvhost_vi
[  160.096479]
[  160.097968] CPU: 0 PID: 458 Comm: rs:main Q:Reg Tainted: G      D W    3.10.40 #138
[  160.105609]

That’s a compiz memory error. Are you running any particular application or attaching any unusual peripheral at the time?

i think i am not attaching any unusual peripheral. only USB hub is connected for mouse and keyboard. and one display is attached.
Regarding Application, i have one application that is in QT software. but sometimes my board hang even when i do not run that application. so just installing it can also do problem ?

Which L4T and kernel release is this? See:

head -n 1 /etc/nv_tegra_release
uname -r

It is possible it is related to Qt, but it is also impossible to know for sure from this. The bug is occurring in kernel space, but system calls via QT in user space could just be hitting the bug more often than other software.

If you get all “ok” from this, then you know your own L4T driver software is correctly in place:

sha1sum -c /etc/nv_tegra_release

I suspect that is all “ok” anyway since you’d have crash and burn far sooner if not ok. Compiz itself is related to the NVIDIA driver though since hardware accelerated calls of or through Compiz eventually go through that driver. There have been a number of Compiz bugs which were unrelated to NVIDIA drivers and I wish I could give you an answer but I have no way of tracing where the issue starts at. Certainly one possibility as a test is to at least temporarily remove the QT software and see if things change.

Since it is a custom board, then it could even be a hardware or device tree issue the drivers don’t know to compensate for.

I am not in a position to try to reproduce this, but if you were to come up with some particular software or program combination which can allow other people to reproduce this, then debugging would be a lot easier. From what you’ve said it sounds like even your case does not always occur at the same time. Ultimately, if you can’t find a way for others to reproduce this, then you might end up putting the source/debug packages for compiz on the system and running kdb/kgdb to see values of call arguments and specific lines in source code until you get a specific answer…and that is a very long learning curve. Finding that specific case where you can reliably trigger this the best way to go.