Comment 24 for bug 1727662

Alexander Kops, to advise, if the root cause problem is drm-intel (I'll let Kai-Heng Feng speak to this as the root cause since he asked you to test this), and this is confirmed an issue in the latest mainline kernel (which is now 4.14-rc8) then testing drm-intel makes sense.

This is due to how Ubuntu sources paches from mainline (not drm-intel), and some patches, but not necessarily all, are sent from drm-intel to mainline. Also, drm-intel is an experimental, fast changing tree, where some patches that don't and will never exist in mainline can be removed/added at any time.

Despite this, while you did note the kernel crash as per #4, and the errors as per the Bug Description, you didn't include the log in its entirety, which would allow one to best confirm this is the root cause.

I took a peak at the recent attachments, and while I'm not an expert, I didn't find better confirmation either way.

Kai-Heng Feng, could you please advise on your thoughts regarding the root cause here?

Would an SSH/netconsole dump be helpful here as per https://help.ubuntu.com/community/DebuggingSystemCrash, or you think enough information is available?