This bug was fixed in the package linux - 4.18.0-15.16
--------------- linux (4.18.0-15.16) cosmic; urgency=medium
* Ubuntu boot failure. 4.18.0-14 boot stalls. (does not boot) (LP: #1814555) - Revert "drm/i915/ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5"
* Userspace break as a result of missing patch backport (LP: #1813873) - tty: Don't hold ldisc lock in tty_reopen() if ldisc present
-- Stefan Bader <email address hidden> Thu, 07 Feb 2019 11:24:34 +0100
This bug was fixed in the package linux - 4.18.0-15.16
---------------
linux (4.18.0-15.16) cosmic; urgency=medium
* Ubuntu boot failure. 4.18.0-14 boot stalls. (does not boot) (LP: #1814555) ringbuffer: Delay after EMIT_INVALIDATE for gen4/gen5"
- Revert "drm/i915/
* Userspace break as a result of missing patch backport (LP: #1813873)
- tty: Don't hold ldisc lock in tty_reopen() if ldisc present
-- Stefan Bader <email address hidden> Thu, 07 Feb 2019 11:24:34 +0100