Hi, This query is about a random behaviour observed on on 2 out of 35 ARM v7 based chipsets. The intention here is to ask about the further diagnostic approach that should be done to root cause the malfunction observed only on 2 chipsets (Rest 33 chipsets are working fine consistently). All the 35 chipsets have the same SoC architecture. When the chipsets boot up (from uboot), I see that intermittently (1 out of 3 boots), the boot up halts/resets(sometimes) at uboot (while accessing some registers from ddr controller) or at kernel. The behaviour changes with temperature (some times seen prominently at lower temperatures like -5) or with logs (adding more console logs causes the occurence of this issue to diminish) or even by removing some external peripheral (i2c) access during bootup or by adding instructions like memory barriers/cache flush (which causes the occurence of the issue to diminish). I need some guidance/pointers to debug such issues further. Please note that we are observing such issues on silicon (SoC) and we do not have the fpga model available (for chipscope debugging). I need to give a concrete explanation for the malfunction observed on the 2 chipsets. In case if this is an inappropriate forum, I would humbly request to let me the know the appropriate forum to ask such queries. Regards, Ayan Kumar Halder