Ive just converted some code from printk()s to dev_dbg()s, and things run, but I havent succeeded in inducing any output. I tried using sysctl : 514 sysctl kernel.printk 515 sysctl kernel.printk=" 8 4 1 7" it looks like Im missing the -w, but it has remembered what I wrote, (I retried too, no difference) soekris:~# sysctl kernel.printk kernel.printk = 8 4 1 7 so it should now log everything to the console, no ? have I misunderstood man sysctl or Docs/sysctl/kernel.txt somehow ? is there a /proc or /sys control point for use with dev_*() functions, perhaps to turn them on/off on a driver basis ? -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/