I've had this error for a bit and finally decided to do something to address it. Now, it should be noted that if you actually do have an Intel processor that is functioning as your graphics card then you may have another problem and this modification could cause you to have more system problems so be careful.
I have a system with an nVidia graphics card in it so I know for certain that my system has no need for, and is not using, Intel graphics. Yet, on boot I receive the following error:
[ 30.027708] intel ips 0000:00:1f.6: failed to get i915 symbols, graphics turbo disabled
Not only does it error but it causes my system to sit around attempting to load this functionality when it simply doesn't exist. I'm not okay with this.
So after a little research, it turns out that this error is not uncommon. There are suggested fixes and work arounds; some work, some don't. This is the one that worked for me.
The goal is to modify your blacklist.conf file for modules and your modules file which in turn will disable the intel ips module.
Open the blacklist.conf file with your favorite text editor, mine is vim and add an entry at the bottom of the file similiar to the one shown:
sudo vim /etc/modprobe.d/blacklist.conf
Add text similar to below:
# silly error messages about not being able to find i915 symbols on boot. Bogus message for sure. blacklist intel_ips
Save and exit. Toss your system a reboot and you should find all to be well with the world again.