Не удалось установить конфигурацию для crtc 64 (15.04)

Иногда, когда я подключаю второй ЖК-монитор (iiyama ProLite E2407HDSV)

Характеристики:

Native resolution   Full HD 1080p, 1920 x 1080 ( 2.1 megapixel)
Horizontal sync 30-81 KHz
Vertical sync 56-75 Hz

к моему ноутбуку Asus N56J

Характеристики дисплея:

15.6" IPS 1920 x 1080 ( Full HD ) 

и я пытаюсь расширить монитор ноутбука с помощью ЖК-дисплея. Я получаю сообщение об ошибке:

could not set the configuration for crtc 64

После нескольких попыток он работает и ошибка ушла. Кроме того, когда я перехожу к настройкам дисплея, я получаю прозрачное окно, например:

Также устанавливаются следующие дополнительные драйверы:

myuser@my-laptop:~$ xrandr:

Screen 0: minimum 8 x 8, current 3520 x 1200, maximum 16384 x 16384
eDP1 connected primary 1920x1080+0+0 344mm x 194mm
   1920x1080      60.1*+   59.9  
   1680x1050      60.0     59.9  
   1600x1024      60.2  
   1400x1050      60.0  
   1280x1024      60.0  
   1440x900       59.9  
   1280x960       60.0  
   1360x768       59.8     60.0  
   1152x864       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
HDMI1 disconnected
VGA1 connected 1600x1200+1920+0 521mm x 293mm
   1600x1200      60.0* 
   1680x1050      60.0  
   1280x1024      75.0     60.0  
   1440x900       75.0     59.9  
   1152x864       75.0  
   1024x768       75.1     70.1     60.0  
   832x624        74.6  
   800x600        72.2     75.0     60.3     56.2  
   640x480        75.0     72.8     66.7     60.0  
   720x400        70.1  
VIRTUAL1 disconnected

myuser@my-laptop:~$ sudo lshw -c video:

[sudo] password for myuser: 
  *-display               
       description: 3D controller
       product: GM108M [GeForce 840M]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       version: a2
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:42 memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:f7000000-f707ffff
  *-display
       description: VGA compatible controller
       product: 4th Gen Core Processor Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 06
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:39 memory:f7400000-f77fffff memory:d0000000-dfffffff ioport:f000(size=64)

myuser@my-laptop:~$ lspci | grep VGA:

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06

myuser@my-laptop:~$ uname -r:

3.19.0-30-generic

myuser@my-laptop:~$ X -version:

X.Org X Server 1.17.1
Release Date: 2015-02-10
X Protocol Version 11, Revision 0
Build Operating System: Linux 3.19.0-28-generic x86_64 Ubuntu
Current Operating System: Linux mva-laptop 3.19.0-30-generic #33-Ubuntu SMP Mon Sep 21 20:58:04 UTC 2015 x86_64
Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic root=UUID=a1d7434a-6c0f-4117-8d2f-1e32f902475f ro quiet splash
Build Date: 11 September 2015  10:30:58AM
xorg-server 2:1.17.1-0ubuntu3.1 (For technical support please see http://www.ubuntu.com/support) 
Current version of pixman: 0.32.6
    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.