... 2nd Edition June 2001 . ... Debugging System Faults . ... This chapter introduces techniques you can use to monitor kernel code and trace errors under such trying circumstances. ... Used to report error conditions; device drivers will often use KERN_ERR to report hardware difficulties. ... Even if you've used all the monitoring and debugging techniques, sometimes bugs remain in the driver, and the system faults when the driver is executed. ... Back to: Linux Device Drivers, 2nd Edition . ...