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I have been trying to debug my kernel code with printk statements. But the messages does not show up on the console. cat /proc/sys/kernel/printk gives 7 4 1 7. What could be the reason?

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use the command:

dmesg -E

-E : enable printing messages to console

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Check your /etc/rsyslog.conf and look for any kern.* rules. That should tell you where the kernel levels are printing out to. You can also specify your own location like:

kern.debug                  /var/log/kernDebug.log

for kernel messages at the debug level.

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