On Tue, May 10, 2016 at 05:21:35PM +1000, Tobin Harding wrote: > pr_debug messages do not appear in dmesg output (or via cat /proc/kmsg). I have > set console level to 8 (cat /proc/sys/kernel/printk -> 8 1 4 8). > > Any suggestions please? Please read Documentation/dynamic-debug-howto.txt