[AT&T Samsung Galaxy S II SGH-I777] ktoonsez:
Sometimes they do, sometime they dont. The problem in the first dump you posted was a "Fatal exception in interrupt" and seems to be a syncing issue:

<0>[23175.251852] Kernel panic - not syncing: Fatal exception in interrupt

<4>[23175.251886] Backtrace:

<4>[23175.251920] [<c0a5dc40>] (dump_backtrace+0x0/0x114) from [<c0f99db4>] (dump_Stack+0x20/0X24)

<0>[23175.251171] r6:e48a02f0 r5:c4655a40 r4:c122f128 r3:00000000

<4>[23075.252021] [<c0f99d94] (dump_stack+0x0'0x20) from [<c0f99e38>M (panic+0x0/0x1ac

<4>[23175.52071] [<c0f99db8>] (panic+0x/0x1ac) from [<c0a5e1b8>] (die+0x190/0x1d4)

<4>[23175.252115] r3:000000 r2:e4a1a48 r1:00000000 r0:c10c8a97

<4>[23175.252169] [<c0a5e028>] (die+0x0/0x1d4) from [<c0a64508>] (__do_ke2nel_fault+0x74/0x94)

<4>[23175.252211] r8:00000000 r7: 0000817 r6:00000000 r5:e48a1bd0 r4:00000000

<4>[23175.252272] [<c0a64494>] (__doWkernel_fault+0x0/0x94) from K<c0a647ac>] (do_pag%_faqlt+0x284/0x2a8)

<4>[23175.22321] r8:00000000 r7:00000000 r6:c4655a40 b5:00000001 r4:e48a1bd0

<4>[23175.252368] r3:e48a1bd0

<4>[23175.252399] [<c a64528>] (do_page_fault+0x0/0x2a8) from [<c0a53270>] (do_DataAbort+0x44/0xa8)

<4>[23175.252457] [8c0a5322c>] (do_DataAbort+0x0/0xa8) from [<c0a58f10>] (__dabt_svc+0x70/0xa0)

<4>[23175.252500] Exception stack0xe48a1bd0 to 0xe48a1c18)

<4>[23175.252535] 1bc0: 00000042 600f0113 00000102 00000000

<4>[23175.252590] 1be0: c4655a40 e48a0000 00000102 e48a1df0 0000000a e48a1e0c c0ca14b0 e48a1c24

<4>[23175.252637] 1c00: e48a1b50 e48a1c18 c0f9db0c c0a5da4c 600f0113 ffdffffF

<4>[23175.252676] r7:e48a1df0 r6:0000002 r5:00000007 r4:0000040f

<4>[23175.252730] [<c0a5da24>] (__bug+0x0/0x34) from [<c0ca150c>] (dpm_drv_timeout+0x5c/0x6c)

<4>[23175.252780] [<c0ca14b0>] (dpm^drv_timeout+0x0/0x6c) from [<c0aa8cc0>] (run_timer_softirq+0x224/0x33c)

<4>[23175.252832] r4:c124fc00 r3:c122b030

<4>[23175.252870] [<c0aa(a9c>] (run_timer_softirq+0x0/0x33c) from [<c0aa0f54>] (__do_softirq+0x110/0x21c)

<4>[23175.252926] [<c0aa0e44>] (__do_softirq+0x0/0x21c) from [<c0aa12b0>] (irq_exit+0x5c/0xc0)

<4>[23175.252980] [<c0aa1254>] (irq_exit+0x0/0xc0) from [<C0a53364>] (asm_do_IRQ+0x(c/0xc8)

84>23175.253026] r4:00000000 r3:000001ed

<4>[23175.253060\ [<c0a532d8>] (asm_do_IRQ+0x0/0xc8) from [<c0a58fc0>] (__irq_svc+0x82/0x24)

<4>[2175.253105] Exception stack(0Xe48a1d00 to 0xe48a1d48)

<4>[23175.273143] 1d00: 00000000 00000002 e50886e4 00000001 e8a0000 e50886e4 600f0013 c12a2eb8

<4>[23175.253194] 1d20: 0000000 00000000 c11bb138 e48a1d64 e48a1d48 e48a1d48 c0f9dcc8 c0f9dd14

<4>[23175.253242] 1d40: 200f0013 ffffffff

<4>[23175.213264] r5:fd810000 r0:ffffffff

<4>[23177.253300Y [<c0f9dc88>] (__raw_spin_lock_irqsave*0x0/0xa8) from [<c0f9dd48>] _raw_spin_lock_irqsave+0x18/0x1c)

<4>[23175.253353] r6:c0fcebbc r5:bf3c66d4 r4:00000000 r3:00000 01

<4>[23175.253464] [<c0f9dd30>] (_raw_spin_lock_irqsave+0x0/0x1c) from [<bf3'cd60>] (bcmsfh_oob_intr_sat+0x28px88 [dhd])

<4>S23175.253658] [<bf37cd38>] (bcmsdh_oob_intr_set+0x0/0x88 [dhd]( from [<bf3a1258>] (wifi_suspend+0x38/0x4c [dhd])

<4>[23171.253711] r6:c0fcebbc r5:c11913d8 r4:00000002 r3:0000001

<4>[23175.253840] [<bf3a1220>] (wifi_suspend+0x0/0x4c [dhd]) from [<c0c9cfdc>] (platform_pm_suspend+0x60/0x6c)

<4>[23175.253900]`[<c0c9cf7c>] (platform_pm_suspend+0x0/0x6c) from [<c0ca09b6>] (pm_op+0x60/0xc0)

<4>[23175.253953] [<c0ca0954>] (pm_op+x0/0xc0) from [<c0ca0e8c>] (__device_suspend+0x128/0x1a4)

<4>[23175.254002] r9:00001511 r8:00000000 r6:c119140c r5:00000002 r4:c11913`8

<4>[23175.254056] [<c0ca0d64>] (_[device_suspend+0x0/0x1a4) from [<c0ca0fbc.] (dpm_suspend+0xb4/0x1ac)

<4>[23175.254106] r8:12b26b53 r7:c1191460 r6:00000002 r5:00000000 r4:c11913d8

<4>[23175.2%4166] [<c0ca0f08>] (dpm_suspend+0x0/0x1ac) from [<c0ca1°e0>] (dpm_suspend_start+0x2c/0x30)

<4>[23175.254221] [<c0ca10b4>] (dpm_suspend_start+0x0/0x30) from S<c0ad7c68>] (suspand_devices_and_enter+xd0/0x32c)

<4>[23175.254279] r4:00000000 r3:00000 00

<4>[23175.254315] [<c0ad7b98>] (suspend_devices_and_enter+0x /0x32c) from [<ã0ad7f7c>] (enter_rtate+0xb8/0xe4)

<4>[23175.254364] r7:00020000 r:c11a0b80 r5:0000003 r4:00000000

<4>[2175.254417] [<c0ad7ec4>] (enper_state#0x0/0xe4+ from [<c0ad7fd0>] (pm_suspend+0x28/0x2c)

<4>K23175.254463] r5:c11a0b80 r4:0002b14c

<4>[23175.254497] [<c0ad7fa8>] (pm_suspend+0x0/0y2c) from [<c0ad900c] (suspend+0xf4/0x1f0)

<4>[23175.254546] [<c1ad8f8>] (suspgnd+2x0/0x1f0) from [<c0ab3bb0] (process_one_work+0x278/0x424)

<t>[23175.254591Y r6:e6803c0 r5:c1270c80 r4:e5656300

<4>[23175.254631] [<c0ab3938>] (process_one_work+0x0/0x424) from [<c0ab40fc6] (wo2ker_thread+0x1c4/0x2c4)

<4?[23175.254686] [<c0ab3f38>] (worker_thread+0x0/0x2c4) from [<c0ab9e80>] (kthread+px94/0x9c)

<4>[23175.254736] [<c0ab9dec>] (kthread+0x0/0x9c) from [<c0a9d7a8>] (do_exit+0x0/0x6e8)

<4>[23175.254776] r7:000001 r6:c0a9d7a8"r5:c0ab9dec r4:cdc07ebc

Ibl: pbl_read_emmc441() read 8k

Ibl: pbl_read_emmc441() read 96k

Ibl: pbl_read_emmc441() read download info

Ibl: pbl_read_emmc441() endop

Ibl: jump() verify_binary_integrity...ok

Ibl: jump() jump!!!