On Wed, 7 Oct 2009, Madhavi Manchala wrote: > Dear All, > > I am not able to get the debug messages from the USB core files like > driver.c, message.c etc. I have followed the below procedure for > getting the debug messages from the core files. The kernel version is > 2.6.30 and distribution is Fedora Core 8. > > 1) I have made CONFIG_USB=m in the .config file before building the > new kernel image. By this, I got the files in the usbcore directory of > drivers/usb folder. You also have to enable CONFIG_USB_DEBUG. > 2) I have added some debug messages through simple printk in > message.c and driver.c files > 3) Build the usbcore.ko file with make command in the > /usr/src/kernels/linux-2.6.30/ directory. > Make M=drivers/usb/core > 4) Copied the build usbcore.ko file into > /lib/modules/2.6.30/kernel/drivers/usb/core directory. > 5) Reboot the system to affect every thing. It is also possible > without restarting the system by unloading all the dependent modules > then usbcore. But, I just restarted the system. > 6) Then, when I insert the PEN / THUMB drive I did not see my debug messages. > > However, there are some messages in driver.c file with pr_info which > are displayed in the /var/log/messages. So, I also added with pr_info > API and performed the 3 to 6 above steps again. Even though, there is > no luck. I did not see my debug messages (newly added debug messages) > in the /var/log/messages file. > > Please could any one let me know, if I missed any thing here. You probably have to run mkinitrd or something similar, depending on your distribution. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
