monitorscoming out of powersafe mode: "atop crashed with SIGFPE in __libc_start_main()"

When i try to wake up my monitor screens after they go into powersafe mode (they go dark after inactivity), the system crashes. I know the system works when powered down, because i can hear the system playing music. It's only after i try to wake up the system, the wholes system crashes (with blinking caps lock).

I suspect it has to do with the 2x 4k monitor screens attached to the Dell XPS 12, which the system can't handle as described in;
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/1459613
Even though, the system can handle just the 2x 4k screens with the laptop screen on off. I suspect the system tries to use all three screens temporarily while waking up.

I can reproduce this and don't even have to wait till the screens go dark. I just unplug the mini-display port and the same happens.

It's not really an issue for me (i'll try to find out how to turn of the powersetting for the monitors), but i just thought lets report it so it's a known issue.

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: atop 1.26-2
ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8
Uname: Linux 3.19.0-21-generic x86_64
ApportVersion: 2.17.2-0ubuntu1.1
Architecture: amd64
CrashCounter: 1
Date: Fri Jun 19 09:24:47 2015
ExecutablePath: /usr/bin/atop
InstallationDate: Installed on 2015-03-04 (107 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
ProcCmdline: /usr/bin/atop -a -w /var/log/atop/atop_20150619 600
Signal: 8
SourcePackage: atop
StacktraceTop:
 ?? ()
 ?? ()
 __libc_start_main (main=0x402c70, argc=5, argv=0x7fff2ec4a5c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff2ec4a5b8) at libc-start.c:289
 ?? ()
Title: atop crashed with SIGFPE in __libc_start_main()
UpgradeStatus: Upgraded to vivid on 2015-04-23 (56 days ago)
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