[cramoisi]

Thanks!! After reading the crash log, i'm wondering if it's not firmware related. I read some closed cases linked to driver path in some old firmware. For myself I'm still in 3.19.X when new KA1 and such are 4.X.

(i looked at the file in the firmware (3.19.5761) and there is no file for my first warning :
insmod: can't read '/drivers/ntx508/wifi/sdio_wifi_pwr.ko': No such file or directory
and there is a file there (and the above file is in the same folder) :
insmod: can't insert '/drivers/mx6sl-ntx/wifi/dhd.ko': invalid parameter

so i'm thinking :
Another fact too (but i throw it for what it is, perhaps useless), I launch koreader with advboot so nickel doesn't run before koreader.