I have installed ubuntu 14.04 LTS version. It logs in correctly. However, I have found a flood of printk messages when I logout/shutdown the computer. See the error in the image:


I have used the solution suggested in another question.

i.e., modify sysctl.conf file by UN-commenting kernel.printk = 3 4 1 3. But the system does not allow me to modify sysctl.conf.

I have used the techniques suggested in


as well as this website

Both of them fail to modify the files.

Please note that I am using samsung ssd Pro drive and Dell desktop computer with default BIOS setup.

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