We're getting reports of the Intel driver crashing in Ubuntu 15.10. One user can easily reproduce this by undocking their Lenovo Thinkpad T540p.
Tracked in Ubuntu:
Stacktrace on errors.ubuntu.com:
Created attachment 120199 [details]
Sorry, I guess you need an account to view it on errors.ubuntu.com.
Hmm, that doesn't even closely match upstream. What is the corresponding source? Or probably better just to check with upstream first.