Kernel 4.13.0 update causing x to not load properly using amdgpu graphics on ubuntu 16.04.3

[Xuramaz]

On my ubuntu 16.04.3 system, the update to kernal 4.13.0-26.29~16.04.2 (which also came in installing 4.13.0.26.39,although that wasn't the one that was running when the issue occurred). After a reboot, x broke, with the boot initially started on the my left screen (the run running on an r9 390), and switched to my right screen (Running off the integrated gpu of my Intel 4690-k), where it looked normal. For about two minutes, the screen would very quickly blink about 3 times a second. During this period typing was difficult, with many keypresses randomly missing. However that issue quickly went away.

Initially I thought it was a compatibility issue with amdgpu-pro (17.04), however once I uninstalled that, the issue continued unchanged. (where then my system was running the version of amdgpu from the oibaf ppa). Once I managed to return to old kernal, my system returned completely back to normal.

I can tell more system details, however won't help with more details of the bug, and I don't want to replicate it and break my system again. I am sorry however that I forgot to take a picture of both screens to show what was going wrong during boot, and the point at where it switched screens.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1743830/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1743830

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the proposed kernel and post back if it resolves this bug?
See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed.

Thank you in advance!

[Xuramaz (dukey774)]

I attempted to repeat the issue by installing kernel 4.13.0 using the ukuu utility (I couldn't find how to install the exact kernel that created the issue, so that I could create a bug report). The exact kernel that ended up being installed was 4.13.0-041300-generic.
On this kernel, I have no issues.

[Xuramaz (dukey774)]

Sorry, in post #4, when I said "to create a bug report", what I meant was creating the logs files that the kernel bot asked for in post #2.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]