> When I received the tablet, I used dd to back up the internal card. When I used > a block size of 4M in that operation, it also froze; however, the standard block > size (512) worked. That suggests that the standard Linux r/w operations on the > device are too fast. Unlikely. > What should I do to get some debug information? As its Baytrail-T make sure you have - Current BIOS - Latest kernel If it persists try disabling power management on the SD card interface. It may be worth reading through the ASUS T100TA bug reports and workarounds as that is probably the most poked at platform for BYT/T Alan -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html