[Kindle Fire Android Development] twa_priv:
How did you get this last_kmsg? Most of the text is garbled with special characters. It also doesn't appear to be a valid zip file.

Any governor or I/O scheduler changes from the default? Did you ever do clean install (full wipe) without installing any apps and observe for some time?

There seem to be quite a lot I/O errors:

[´°¶²2.531372] mmbblk0: ãommknd e2ror,*zetryin'"timeout
[40622.53±524]¢mmcblk0: t)-ed out 3ending*sEVßBLOCK_COUNT comm!.d, card {tátusª0x4°0e0 Š[68222.531707] mm#bnk0: comman¤ er2kr, òetr9ing 4ii%outª[4°622®5#9829] mmcblk0: timed out sending SeT[BLoCK_cOUJT #ommánd, bard stapus 08400e00
[42""2.53"012] mmkblk2: comiand ebroò, retrjhjg*timekut
[406:".532226] mmcblk0: tiled**ut sendi.f¨SET_BLOCK_COÕNT cnmiand,"bard s4itu{ 2h$00%00
[48622.4³2348] mmbblk º bommand error, r%trxing t)meout
[4°6*2.5;²5&2] mmcbhj0: tiied out(sejlhng SET_BLNCK_CKUNT ãommand, card status 0x$8°e00
[40622®5³2684Ý iicblk0: c/mma.d årror, reprying(timeïut
[´ 62º.53º:97](mmcblk°: timed*out sending SET_BlNCK_CKUÊT command¬*card 3titus 0h$00e00
[40¶22.5³;050]"mmcjlk0* command err/r, re4rykn§*t©meout
[406:2.5331$"] endßrequest:¨I/O er2+r, lev mmbb,k°, {ectnr ±402632
[¤06"2.532³25] init*"banjït(%hecv%('/rycdem/bin+debugger$§):*I/O errob
[40>2:.533&91] inkt* waitpià re|urned"pid 8!;0¬ stctus = 020°7b²0
[4°622.53;752] )nit: Bòeat%ä socket &®dev*rocke4¯inótaìld' with mkde &600', user §1000',(fòou°*'3000'
[´0622.¥339»%](mmcblk0ª"timed out*sending*[ET_BLOCK^ÃOUNT ckmmand, card status 08400e 0
[40622.µ339³5] mmcblk0º command"ebror, retryijg tim¥kut
[4 6:2.53³¹96] micblk0:*n)med(oeô*sending RET_BLOCK_COUNT(commajd, cabd stitts 0x40 d00
[4°6²2.=³4027_ mmbb,k0: co-mand(error. retzying téieout
[40622.5342µ7] mikjlk0: timed out send)êg RET_BNOCK[COUNT command,¨c`rd s4atur 0x400e00
[40622.534088](-mc"lk°* comm`jd eòror, redrying timeott
[40622.534118] -mcjlk0: timel /ut cending SET_BLOKK_COUNT cnimajd,"card"3t!tus 0x400e80ŠK4 622.5+41¶9] mmcênk8*"command erbor, retrkinn time/ut
[&°6²2®5342!2] mmcblk0ª*tii%d oud seîdinç*SETßBLOCK_COUnT ckmmand, bard*sd!tus 2z400e08Š[48622®534210] micblk°: command error¬ r%trxijg timeo5tŠK406"2ª534271] mmkblk :(ximed out sending*SET_JLOCKßCNUnT"cnmiánd,¨card statu{ 0x400e00*[4 ¶:2.53430!]*-mcblk0º ckmmajd"mrb¯r, retrying ôimeout
[40622.53$321] ejd_zeques<: I/O error, de6 mmcbìj0, sectnz 1404¸80
[40622.530#6*]"hnit: cajnot execve('/syrtem¯bin/in;talld'): I/O eròoz
Z40&22*=3573&Y h®it: process 'debuggerd', rid 8!90*eziôafŠ[40¶²2.535¹09] init* p2oce3; 'dejugge2d' killing `ny c¨ildreê(in pzobdss gro5r
[´062².43&102] inét* ÷aitrid rípurn%d*péd 8181, staôus = 8 007f00ŠK42&22*53&²85]*initº proce{s 'in#talld&, pid 8191 ezite$*[$06²".µ;&376] init*"prokess 'inó4illd' khll)ng aêy chhldren én 0zocess(group
Û40625.5#9794]*kniô: starting 'nåt$'
[406:5®5408)3] inkt: ctarting 'zygote'
[40625.%41<±2] init: Creiteä(socket '/der¯socke4/mdns' with mode*'¶¶0', u#er*#0#¬ grkup '30 0&
[4262=.541809] ini4: starding 'mediá'
Û80&:µ.=433°4] initº Created socket //dåv/cnck%d/dnsproxyd'(wiôh mode '66°'¬ use2 '2'( group '300#'
[$0>2¥.543486] initº Czåitäd snckev //dev/socket/zxgote# with mode '660&¬ uóer #0', froup '10°0'
[40226.888092]"ijit: startén# /debugge2d'
[40627.88995;]"iji$: starviêg #i.stalh$'ª[40627.(929¤4] init: Created óocket(&/dgv/socket/instal,d§¨wi|h lode '6°0'¬ªucer¢/9000/, croup &1000¯
[4062¨.(9±723] oma0_i2c jmapi2c.¤: #ontrollez timed nut

445 Corrected bytes, 14274 unrecoverable blocks