OpenWrt Forum Archive

Topic: How to turn on printk(KERN_DEBUG...) or where to find the outputs?

The content of this topic has been archived on 22 Mar 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

Post #1
legendbb
12 Mar 2010, 15:56

As subject, thanks,

Post #2
mazilo
12 Mar 2010, 16:43

Use make kernele_menuconfig to turn the feature ON/OFF.

Post #3
legendbb
12 Mar 2010, 16:57

Mazilo,

Could you please tell me the feature to toggle the KERN_DEBUG message?

I have Kamikaze (r20152), Global build settings -> Kernel build options -> Compile the kernel with Debug Filesystem enabled by default.

Thanks,

Post #4
mazilo
12 Mar 2010, 20:36

Once make kernel_menuconfig is executed, go to General setup -> Configure standard kernel features (for small systems) -> Enable support for printk.

(Last edited by mazilo on 12 Mar 2010, 20:36)

Post #5
legendbb
15 Mar 2010, 15:11

Thanks to Mazilo for the kind reply, I found I already have the printk support by default.

On my built I can only see KERN_INFO messages by "logread" or "dmesg"

I am attempting to see outputs from KERN_DEBUG.

Any suggestions?

Thank,

Post #6
mazilo
15 Mar 2010, 19:52
legendbb wrote:

I am attempting to see outputs from KERN_DEBUG.

I haven't done this. So, I believe you will need to make kernel_menuconfig and go over to see which debug options you want to enable.

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