I have the same problem, kicad seems to crash the Xorg server when zooming or 
scrolling around. Usually i can still move the mouse cursor, but p.e.  
switching to a console doesn't work. Shortly after the crash, the magic system 
request keys still reboot the machine, sometimes even those stop working.
I tried with the intel drivers and with the ironhide nvidia drivers (optirun 
kicad) on a Dell XPS L702X, both crash. The only thing in Xorg.1.log is

.
.
.
[    61.362] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
[    61.362] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
[    61.362] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
[    61.362] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
[    61.362] (EE) FBDEV(0): FBIOPUTCMAP: Invalid argument
[    61.410] (--) SynPS/2 Synaptics TouchPad: touchpad found
[    61.580] (II) Power Button: Close
[    61.580] (II) UnloadModule: "evdev"
[    61.580] (II) Unloading evdev
[    61.740] (II) Video Bus: Close
[    61.740] (II) UnloadModule: "evdev"
[    61.740] (II) Unloading evdev
[    61.860] (II) Video Bus: Close
[    61.860] (II) UnloadModule: "evdev"
[    61.860] (II) Unloading evdev
[    62.020] (II) Power Button: Close
[    62.020] (II) UnloadModule: "evdev"
[    62.020] (II) Unloading evdev
[    62.120] (II) Sleep Button: Close
[    62.120] (II) UnloadModule: "evdev"
[    62.120] (II) Unloading evdev
[    62.120] (II) Laptop_Integrated_Webcam_2HDM: Close
[    62.120] (II) UnloadModule: "evdev"
[    62.120] (II) Unloading evdev
[    62.120] (II) USB Optical Mouse: Close
[    62.120] (II) UnloadModule: "evdev"
[    62.120] (II) Unloading evdev
[    62.120] (II) AT Translated Set 2 keyboard: Close
[    62.120] (II) UnloadModule: "evdev"
[    62.120] (II) Unloading evdev
[    62.120] (II) UnloadModule: "synaptics"
[    62.120] (II) Unloading synaptics
[    62.120] (II) Dell WMI hotkeys: Close
[    62.120] (II) UnloadModule: "evdev"
[    62.120] (II) Unloading evdev
[    62.122] (WW) xf86CloseConsole: KDSETMODE failed: Input/output error
[    62.122] (WW) xf86CloseConsole: VT_GETMODE failed: Input/output error
[    62.122] (WW) xf86OpenConsole: VT_GETSTATE failed: Input/output error
[    62.122] 
Fatal server error:
[    62.122] xf86CloseConsole: VT_ACTIVATE failed: Input/output error
[    62.122] 
[    62.122] 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
[    62.122] Please also check the log file at "/var/log/Xorg.1.log" for 
additional information.
[    62.122] 
[    62.122] 
Backtrace:
<----- end of file here

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/892440

Title:
  Xorg crashes when using kicad.

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https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/892440/+subscriptions

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