David H. Lynch Jr. wrote: > I had a similar problem. In my instance it turned out that I was > inadvertently using the physical address of my uart as the output address. > This worked during boot becasue there was a 1:1 physical-logical entry > stuffed into the MMU. But since Linux did nto know about it, as soon as > the VM system decided to use that TLB entry IO died - right in the > middle of a string. > > While it is unlikely you made exactly the same mistake. One area you can > check is memory. > > What is your output device ? > > My Output Device is a Xilinx UartLite at 0x40600000 and the kernel detects this as /dev/ttyUL0.
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