[Galaxy S II Original Android Development] dakore:
Happening to me right now while I copy some files to external SD. Phone is dead but file transfer still works. I'll try to take logcat or kmsg from console...

fluxi beta7

edit:

kmsg is quite strange, there is a lot of "SDMMC [1] working" events:

<7>[ 4719.235924] SDMMC [1] working
<7>[ 4719.306453] SDMMC [1] working
<7>[ 4719.342228] SDMMC [1] working
<7>[ 4719.435913] SDMMC [1] working
<7>[ 4719.514765] SDMMC [1] working
<7>[ 4719.535908] SDMMC [1] working
<7>[ 4719.557435] SDMMC [1] working
<7>[ 4719.606414] SDMMC [1] working
<7>[ 4719.635907] SDMMC [1] working
<7>[ 4719.663672] SDMMC [1] working
<7>[ 4719.667618] SDMMC [1] working
<7>[ 4719.705926] SDMMC [1] working
<7>[ 4719.742135] SDMMC [1] working
<7>[ 4719.806256] SDMMC [1] working
<7>[ 4719.852864] SDMMC [1] working
<7>[ 4719.906156] SDMMC [1] working
<7>[ 4719.975858] SDMMC [1] working
<7>[ 4720.035914] SDMMC [1] working
<7>[ 4720.106236] SDMMC [1] working
<7>[ 4720.135909] SDMMC [1] working
<7>[ 4720.161149] SDMMC [1] working
<7>[ 4720.206442] SDMMC [1] working
<7>[ 4720.235912] SDMMC [1] working
<7>[ 4720.306227] SDMMC [1] working
<7>[ 4720.335907] SDMMC [1] working
<7>[ 4720.350345] SDMMC [1] working
<7>[ 4720.375304] SDMMC [1] working
<7>[ 4720.406241] SDMMC [1] working
<7>[ 4720.437260] SDMMC [1] working
<7>[ 4720.535917] SDMMC [1] working
<7>[ 4720.606234] SDMMC [1] working
<7>[ 4720.635910] SDMMC [1] working
<7>[ 4720.706230] SDMMC [1] working
<7>[ 4720.740872] SDMMC [1] working
<7>[ 4720.806431] SDMMC [1] working
<7>[ 4720.835906] SDMMC [1] working
<7>[ 4720.905954] SDMMC [1] working
<7>[ 4720.935904] SDMMC [1] working
<7>[ 4721.006007] SDMMC [1] working
<7>[ 4721.035912] SDMMC [1] working
<7>[ 4721.052457] SDMMC [1] working
<7>[ 4721.059676] SDMMC [1] working
<7>[ 4721.106412] SDMMC [1] working
<7>[ 4721.135913] SDMMC [1] working
<7>[ 4721.206231] SDMMC [1] working
<7>[ 4721.235911] SDMMC [1] working
<7>[ 4721.306231] SDMMC [1] working
<7>[ 4721.335913] SDMMC [1] working
<7>[ 4721.406394] SDMMC [1] working
<7>[ 4721.440951] SDMMC [1] working
<7>[ 4721.506234] SDMMC [1] working
<7>[ 4721.535911] SDMMC [1] working
<7>[ 4721.606232] SDMMC [1] working
<7>[ 4721.635914] SDMMC [1] working
<7>[ 4721.706397] SDMMC [1] working
<7>[ 4721.740866] SDMMC [1] working
<7>[ 4721.751924] SDMMC [1] working
<7>[ 4721.755436] SDMMC [1] working
<7>[ 4721.759650] SDMMC [1] working
<7>[ 4721.905952] SDMMC [1] working
<7>[ 4722.010389] SDMMC [1] working
<7>[ 4722.035920] SDMMC [1] working
<7>[ 4722.106241] SDMMC [1] working
<7>[ 4722.135906] SDMMC [1] working
<7>[ 4722.235933] SDMMC [1] working
<7>[ 4722.306454] SDMMC [1] working
<7>[ 4722.335915] SDMMC [1] working
<7>[ 4722.406233] SDMMC [1] working
<7>[ 4722.435911] SDMMC [1] working
<7>[ 4722.506231] SDMMC [1] working
<7>[ 4722.536895] SDMMC [1] working
<7>[ 4722.537943] SDMMC [1] working
<7>[ 4722.538593] SDMMC [1] working
<7>[ 4722.540570] SDMMC [1] working
<7>[ 4722.541237] SDMMC [1] working
<7>[ 4722.543776] SDMMC [1] working
<7>[ 4722.544996] SDMMC [1] working
<7>[ 4722.547290] SDMMC [1] working
<7>[ 4722.547943] SDMMC [1] working
<7>[ 4722.548818] SDMMC [1] working
<7>[ 4722.635910] SDMMC [1] working
<7>[ 4722.740870] SDMMC [1] working
<7>[ 4722.806252] SDMMC [1] working
<7>[ 4722.835908] SDMMC [1] working
<7>[ 4722.906142] SDMMC [1] working
<7>[ 4722.935905] SDMMC [1] working
<7>[ 4723.035913] SDMMC [1] working
<7>[ 4723.067835] SDMMC [1] working
<7>[ 4723.106241] SDMMC [1] working
<7>[ 4723.135913] SDMMC [1] working
<7>[ 4723.235915] SDMMC [1] working
<7>[ 4723.243417] SDMMC [1] working
<7>[ 4723.306242] SDMMC [1] working
<7>[ 4723.335910] SDMMC [1] working
<7>[ 4723.406230] SDMMC [1] working
<7>[ 4723.435911] SDMMC [1] working
<7>[ 4723.506402] SDMMC [1] working
<7>[ 4723.535911] SDMMC [1] working
<7>[ 4723.606229] SDMMC [1] working
<7>[ 4723.635918] SDMMC [1] working
<7>[ 4723.706240] SDMMC [1] working
<7>[ 4723.740867] SDMMC [1] working
<7>[ 4723.806415] SDMMC [1] working
<7>[ 4723.835904] SDMMC [1] working
<7>[ 4723.905949] SDMMC [1] working
<7>[ 4723.935923] SDMMC [1] working
<7>[ 4724.041659] SDMMC [0] working
<7>[ 4724.065914] SDMMC [1] working
<7>[ 4724.106447] SDMMC [1] working
<7>[ 4724.135907] SDMMC [1] working
<7>[ 4724.160370] SDMMC [1] working
<7>[ 4724.235917] SDMMC [1] working
<7>[ 4724.306235] SDMMC [1] working
<7>[ 4724.335912] SDMMC [1] working
<7>[ 4724.406408] SDMMC [1] working
<7>[ 4724.435913] SDMMC [1] working
<7>[ 4724.506233] SDMMC [1] working
<7>[ 4724.535912] SDMMC [1] working
<7>[ 4724.606233] SDMMC [1] working
<7>[ 4724.612469] SDMMC [1] working
<7>[ 4724.635915] SDMMC [1] working
<7>[ 4724.706414] SDMMC [1] working
<7>[ 4724.745861] SDMMC [1] working
<7>[ 4724.806250] SDMMC [1] working
<7>[ 4724.835907] SDMMC [1] working
<7>[ 4724.905952] SDMMC [1] working
<7>[ 4724.935907] SDMMC [1] working
<7>[ 4725.006164] SDMMC [1] working
<7>[ 4725.035907] SDMMC [1] working
<7>[ 4725.105920] SDMMC [1] working
<7>[ 4725.135911] SDMMC [1] working
<7>[ 4725.235936] SDMMC [1] working
<7>[ 4725.309471] SDMMC [1] working
<7>[ 4725.335919] SDMMC [1] working
<7>[ 4725.406236] SDMMC [1] working
<7>[ 4725.435911] SDMMC [1] working
<7>[ 4725.506233] SDMMC [1] working
<7>[ 4725.535911] SDMMC [1] working
<7>[ 4725.606404] SDMMC [1] working
<7>[ 4725.635913] SDMMC [1] working
<7>[ 4725.706232] SDMMC [1] working
<7>[ 4725.745875] SDMMC [1] working
<7>[ 4725.806255] SDMMC [1] working
<7>[ 4725.835907] SDMMC [1] working
<7>[ 4725.906137] SDMMC [1] working
<7>[ 4725.935905] SDMMC [1] working
<6>[ 4726.407991] [if_usb_resumed]
<6>[ 4727.021891] [if_usb_suspended]
<6>[ 4727.202162] request_suspend_state: wakeup (3->0) at 4727201405677 (2012-06
-23 13:20:58.908436795 UTC)
<6>[ 4727.202838] +s3cfb_late_resume
<7>[ 4727.202900] s3cfb - enable power domain
<6>[ 4727.203352] s3cfb s3cfb.0: fimd sclk rate 50000000, clkdiv 0x7000ff
<7>[ 4727.203485] FIMD src sclk = 50000000
<6>[ 4727.203572] s3cfb s3cfb.0: parent clock: 50000000, vclk: 25067000, vclk di
v: 2
<6>[ 4727.203748] mdnie mdnie: mode=1, scenario=0, outdoor=0, cabc=0, STANDARD_U
I
<6>[ 4727.203863] mdnie mdnie: NORMAL
<6>[ 4727.204093] -s3cfb_late_resume
<6>[ 4727.204167] lcd panel: +ld9040_late_resume
<6>[ 4727.204247] lcd panel: ld9040_power_on
<6>[ 4727.459637] lcd panel: id=2 brightness=0, bl=0, candela=30
<6>[ 4727.459700] lcd panel: -ld9040_late_resume
<6>[ 4727.459748] mdnie mdnie: +mdnie_late_resume
<6>[ 4727.459791] mdnie mdnie: -mdnie_late_resume
<4>[ 4727.471988] dhd_set_suspend: enter, value = 0 in_suspend=0
<4>[ 4727.472044] dhd_set_suspend: Remove extra suspend setting
<3>[ 4727.769480] [TSP] Calibration!!!!!!
<3>[ 4727.770056] [TSP] Calibration End!!!!!!
<3>[ 4727.774483] [TSP] ta_status is 1
<3>[ 4727.774533] [TSP] mxt224_ta_probe
<3>[ 4727.779299] [TSP] TA_probe MXT224 T9 Byte7 is 60
<3>[ 4727.785797] [TSP] TA_probe MXT224 T9 Byte13 is 47
<3>[ 4727.795811] [TSP] TA_probe MXT224 T9 Byte8 is 50
<3>[ 4727.796216] [TSP] calibration success!!!
<6>[ 4727.796259] pm-hotplug: enable cpu auto-hotplug
<6>[ 4727.796327] powersave_late_resume: set cpu0 freq in the 200000-1000000 KHz
range
<7>[ 4727.796416] [TouchKey] sec_touchkey_late_resume
<6>[ 4727.796963] s5p_gpioint_set_type irq:389 is at GPL0(5)
<3>[ 4727.821019] [TSP] Calibration!!!!!!
<3>[ 4727.835765] [TSP] Calibration End!!!!!!
<6>[ 4728.081527] [if_usb_resumed]
<6>[ 4728.452486] lcd panel: id=2 brightness=30, bl=1, candela=40
<6>[ 4728.531306] [if_usb_suspended]
<6>[ 4728.544966] lcd panel: id=2 brightness=77, bl=2, candela=70
<6>[ 4728.587483] lcd panel: id=2 brightness=92, bl=3, candela=90
<6>[ 4728.603341] lcd panel: id=2 brightness=100, bl=4, candela=100
<6>[ 4728.636615] lcd panel: id=2 brightness=115, bl=5, candela=110
<4>[ 4728.798955] cpu1 turning on!
<4>[ 4728.836935] CPU1: Booted secondary processor
<6>[ 4728.840753] Switched to NOHz mode on CPU #1
<4>[ 4728.851368] cpu1 on end!
<3>[ 4729.366280] binder: release proc 10720, transaction 630942, not freed
<7>[ 4729.398737] [VIB] time = 0ms
<6>[ 4729.431807] binder: 9787:9799 transaction failed 29189, size 204-0
<6>[ 4729.433821] binder: 9787:9807 transaction failed 29189, size 204-0
<6>[ 4729.592233] [if_usb_resumed]
<7>[ 4729.639962] [VIB] time = 0ms
<7>[ 4729.640071] [VIB] time = 20ms
<7>[ 4729.660173] [VIB] time = 0ms
<7>[ 4729.661425] [VIB] time = 0ms
<7>[ 4729.753374] [VIB] time = 0ms
<7>[ 4729.753621] [VIB] time = 20ms
<7>[ 4729.773715] [VIB] time = 0ms
<7>[ 4729.776453] [VIB] time = 0ms
<6>[ 4729.803293] [if_usb_suspended]
<3>[ 4729.855011] [TSP] calibration was not decided yet
<7>[ 4729.884154] [VIB] time = 20ms
<7>[ 4729.903495] [VIB] time = 0ms
<6>[ 4729.983435] audss_clk_enable:ON : CLKSRC[0x1], CLKGATE[0x1c7]
<6>[ 4729.984981] G:P:DmaAddr=@66ea0000 Total=16384 PrdSz=4096 #Prds=4 dma_area=
0xffdc0000
<7>[ 4729.990793] i2s_txctrl:Turn on
<6>[ 4730.816613] [if_usb_resumed]
<6>[ 4731.076353] [if_usb_suspended]
<3>[ 4731.216053] [TSP] calibration was good
<3>[ 4731.216538] [TSP] ta_status is 1
<7>[ 4731.216777] [TSP] auto calibration disable!!!
<7>[ 4733.146529] i2s_txctrl: Turn Off - spr is no active
<6>[ 4733.147063] audss_clk_enable:OFF: CLKSRC[0x1], CLKGATE[0x1c3]
<6>[ 4735.757204] [if_usb_resumed]
<6>[ 4735.957095] [if_usb_suspended]
<4>[ 4737.101045] cpu1 turning off!
<4>[ 4737.102645] IRQ112 no longer affine to CPU1
<5>[ 4737.103518] CPU1: shutdown
<4>[ 4737.107804] cpu1 off end!
<6>[ 4738.287766] [if_usb_resumed]
<6>[ 4738.487136] [if_usb_suspended]
<6>[ 4742.011689] sec-thermistor sec-thermistor: notify_change_of_temperature: u
event: TEMPERATURE=410
<6>[ 4751.827605] max8922-charger max8922-charger: max8922_is_charging: charging
state = 0x0
<6>[ 4753.648336] [if_usb_resumed]
<6>[ 4753.847165] [if_usb_suspended]
<6>[ 4758.222597] lcd panel: id=2 brightness=105, bl=4, candela=100
<6>[ 4758.238739] lcd panel: id=2 brightness=99, bl=3, candela=90
<6>[ 4758.271338] lcd panel: id=2 brightness=89, bl=2, candela=70
<6>[ 4758.337114] lcd panel: id=2 brightness=67, bl=1, candela=40
<6>[ 4758.467601] lcd panel: id=2 brightness=25, bl=0, candela=30
<6>[ 4765.674487] request_suspend_state: sleep (0->3) at 4765673730278 (2012-06-
23 13:21:37.380761480 UTC)
<7>[ 4765.678381] [TouchKey] sec_touchkey_early_suspend
<6>[ 4765.683166] powersave_early_suspend: set cpu0 freq in the 200000-400000 KH
z range
<4>[ 4765.692563] dhd_set_suspend: enter, value = 1 in_suspend=1
<4>[ 4765.692666] dhd_set_suspend: force extra Suspend setting
<6>[ 4765.717124] pm-hotplug: disable cpu auto-hotplug
<6>[ 4765.726249] lcd panel: +ld9040_early_suspend
<6>[ 4765.726346] lcd panel: ld9040_power_off
<7>[ 4765.856469] [VIB] time = 0ms
<6>[ 4765.976681] lcd panel: -ld9040_early_suspend
<6>[ 4765.976735] +s3cfb_early_suspend
<7>[ 4766.008597] s3cfb - disable power domain
<6>[ 4766.008661] -s3cfb_early_suspend
<6>[ 4766.042259] active wake lock vbus_present
<6>[ 4766.042308] active wake lock usb device wake lock
<7>[ 4766.140801] SDMMC [1] working
<7>[ 4766.443630] SDMMC [1] working
<7>[ 4766.486023] SDMMC [1] working
<6>[ 4766.487928] [if_usb_resumed]
<6>[ 4766.686889] [if_usb_suspended]
<7>[ 4767.202853] SDMMC [1] working
<7>[ 4767.240648] SDMMC [1] working
<7>[ 4767.533762] SDMMC [1] working
<7>[ 4767.720286] SDMMC [1] working
<7>[ 4767.825245] SDMMC [1] working
<7>[ 4767.884077] SDMMC [1] working
<7>[ 4768.021649] SDMMC [1] working
<7>[ 4768.035085] SDMMC [1] working
<7>[ 4768.145857] SDMMC [1] working
<7>[ 4768.241161] SDMMC [1] working
<7>[ 4768.349385] SDMMC [1] working
<7>[ 4768.505039] SDMMC [1] working
<7>[ 4768.521504] SDMMC [1] working
<7>[ 4768.669408] SDMMC [1] working
<7>[ 4768.723074] SDMMC [1] working
<7>[ 4768.954209] SDMMC [1] working
<7>[ 4769.001110] SDMMC [1] working
<7>[ 4769.200092] SDMMC [1] working
<7>[ 4769.207270] SDMMC [1] working
<7>[ 4769.241643] SDMMC [1] working
<7>[ 4769.347113] SDMMC [1] working
<7>[ 4769.392839] SDMMC [1] working
<7>[ 4769.430476] SDMMC [1] working
<7>[ 4769.561908] SDMMC [1] working
<7>[ 4769.665146] SDMMC [1] working
<7>[ 4769.724090] SDMMC [1] working
<7>[ 4769.749371] SDMMC [1] working
<7>[ 4769.865855] SDMMC [1] working
<7>[ 4769.895331] SDMMC [1] working
<7>[ 4769.898034] SDMMC [1] working
<7>[ 4769.975983] SDMMC [1] working
<7>[ 4770.073376] SDMMC [1] working
<7>[ 4770.150860] SDMMC [1] working
<7>[ 4770.242147] SDMMC [1] working
<7>[ 4770.329978] SDMMC [1] working
<7>[ 4770.361455] SDMMC [1] working
<6>[ 4856.067896] [if_usb_resumed]
<6>[ 4856.266902] [if_usb_suspended]
<6>[ 4862.441873] sec-thermistor sec-thermistor: notify_change_of_temperature: u
event: TEMPERATURE=380
<6>[ 4872.477490] max8922-charger max8922-charger: max8922_is_charging: charging
state = 0x0
<6>[ 4894.477932] [if_usb_resumed]
<6>[ 4894.677243] [if_usb_suspended]
<6>[ 4899.592849] [if_usb_resumed]
<6>[ 4899.792372] [if_usb_suspended]
<6>[ 4912.622060] max8922-charger max8922-charger: max8922_is_charging: charging
state = 0x0
<6>[ 4914.757707] [if_usb_resumed]
<6>[ 4915.067442] [if_usb_suspended]
<6>[ 4920.087905] [if_usb_resumed]
<6>[ 4920.287202] [if_usb_suspended]
<6>[ 4927.722656] [if_usb_resumed]
<6>[ 4927.922193] [if_usb_suspended]
<6>[ 4952.762869] max8922-charger max8922-charger: max8922_is_charging: charging
state = 0x0
<6>[ 4963.557944] [if_usb_resumed]
<6>[ 4963.757251] [if_usb_suspended]
<6>[ 4983.793987] request_suspend_state: wakeup (3->0) at 4983793247929 (2012-06
-23 13:25:15.500278632 UTC)
<6>[ 4983.795949] +s3cfb_late_resume
<7>[ 4983.796016] s3cfb - enable power domain
<6>[ 4983.796455] s3cfb s3cfb.0: fimd sclk rate 50000000, clkdiv 0x7000ff
<7>[ 4983.796586] FIMD src sclk = 50000000
<6>[ 4983.796671] s3cfb s3cfb.0: parent clock: 50000000, vclk: 25067000, vclk di
v: 2
<6>[ 4983.796846] mdnie mdnie: mode=1, scenario=0, outdoor=0, cabc=0, STANDARD_U
I
<6>[ 4983.796960] mdnie mdnie: NORMAL
<6>[ 4983.797188] -s3cfb_late_resume
<6>[ 4983.797260] lcd panel: +ld9040_late_resume
<6>[ 4983.797338] lcd panel: ld9040_power_on
<6>[ 4984.061674] [if_usb_resumed]
<6>[ 4984.130827] lcd panel: id=2 brightness=54, bl=1, candela=40
<6>[ 4984.130930] lcd panel: -ld9040_late_resume
<6>[ 4984.131012] mdnie mdnie: +mdnie_late_resume
<6>[ 4984.131085] mdnie mdnie: -mdnie_late_resume
<4>[ 4984.143218] dhd_set_suspend: enter, value = 0 in_suspend=0
<4>[ 4984.143312] dhd_set_suspend: Remove extra suspend setting
<6>[ 4984.174039] lcd panel: id=2 brightness=77, bl=2, candela=70
<6>[ 4984.206123] lcd panel: id=2 brightness=92, bl=3, candela=90
<6>[ 4984.223775] lcd panel: id=2 brightness=100, bl=4, candela=100
<6>[ 4984.256970] lcd panel: id=2 brightness=115, bl=5, candela=110
<6>[ 4984.273628] [if_usb_suspended]
<3>[ 4984.302277] [TSP] ta_status is 1
<3>[ 4984.302346] [TSP] mxt224_ta_probe
<3>[ 4984.303209] [TSP] Calibration!!!!!!
<3>[ 4984.304342] [TSP] Calibration End!!!!!!
<3>[ 4984.311770] [TSP] TA_probe MXT224 T9 Byte7 is 60
<3>[ 4984.320803] [TSP] TA_probe MXT224 T9 Byte13 is 47
<3>[ 4984.330790] [TSP] TA_probe MXT224 T9 Byte8 is 50
<3>[ 4984.331229] [TSP] calibration success!!!
<6>[ 4984.331294] pm-hotplug: enable cpu auto-hotplug
<6>[ 4984.331379] powersave_late_resume: set cpu0 freq in the 200000-1000000 KHz
range
<7>[ 4984.331505] [TouchKey] sec_touchkey_late_resume
<6>[ 4984.332480] s5p_gpioint_set_type irq:389 is at GPL0(5)
<3>[ 4984.351495] [TSP] Calibration!!!!!!
<3>[ 4984.366647] [TSP] Calibration End!!!!!!
<7>[ 4985.261216] [VIB] time = 0ms
<7>[ 4985.261444] [VIB] time = 20ms
<7>[ 4985.281499] [VIB] time = 0ms
<7>[ 4985.465640] [VIB] time = 0ms
<7>[ 4985.486981] [VIB] time = 20ms
<3>[ 4985.506406] [TSP] calibration was not decided yet
<7>[ 4985.507160] [VIB] time = 0ms
<7>[ 4985.508985] [VIB] time = 0ms
<7>[ 4985.537376] [VIB] time = 0ms
<7>[ 4985.537470] [VIB] time = 20ms
<7>[ 4985.557538] [VIB] time = 0ms
<6>[ 4985.623537] audss_clk_enable:ON : CLKSRC[0x1], CLKGATE[0x1c7]
<6>[ 4985.624909] G:P:DmaAddr=@66ea0000 Total=16384 PrdSz=4096 #Prds=4 dma_area=
0xffdc0000
<7>[ 4985.626877] i2s_txctrl:Turn on
<7>[ 4988.782665] i2s_txctrl: Turn Off - spr is no active
<6>[ 4988.783110] audss_clk_enable:OFF: CLKSRC[0x1], CLKGATE[0x1c3]

EDIT:

Here you can find last_kmsg taken few minutes after slow down. The phone was unresponsive for about 1min, then it just woke up like nothing happened.

https://dl.dropbox.com/u/12007684/last_kmsg