This bug was fixed in the package mir - 0.22.1+16.04.20160516.2-0ubuntu2
---------------
mir (0.22.1+16.04.20160516.2-0ubuntu2) yakkety; urgency=medium
[ Dimitri John Ledkov ]
* Fix FTBFS error: call of overloaded ‘abs(float)’ is ambiguous, by
including cmath c++ header.
-- Łukasz 'sil2100' Zemczak <lukasz.zemc...@ubuntu.com> Thu, 19 May
2016 21:58:43 +0200
** Changed in: mir (Ubuntu)
Status: Triaged => Fix Released
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Touch seeded packages, which is subscribed to mir in Ubuntu.
https://bugs.launchpad.net/bugs/1536662
Title:
[regression] Black screen: Mir hangs and then crashes on startup/login
due to reading from /dev/random
Status in Mir:
Fix Released
Status in Mir 0.19 series:
Won't Fix
Status in Mir 0.20 series:
Won't Fix
Status in Mir 0.21 series:
Triaged
Status in Unity System Compositor:
Fix Committed
Status in mir package in Ubuntu:
Fix Released
Status in unity-system-compositor package in Ubuntu:
Fix Released
Bug description:
cookie_factory attempts to read data from /dev/random at boot, and
blocks until it has enough random data or timesout after 30 seconds.
How I can reproduce
1. Run the Unity8 greeter as a mir server
2. Reboot
Expected behavior: Greeter is displayed as mir && USC run happily
Actual behavior: Mir throws an exception after 30 seconds
Work-around:
Before logging in, move the mouse around lots, for at least 20 seconds. And
after logging in, while you're looking at a black screen, move the mouse around
furiously. This will populate the kernel entropy pool sufficiently to avoid the
hang and crash.
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