Ubuntu 15.10 vs Intel Linux Graphics 1.4

In general, all is fine, but in few moments My Unity freezes When I get this situation: With My Game FM 2016 launched and I try to switch windows. However, only unity freezes and If I go to the terminal (tty1), I can save my game and restart the lightdm.

 

In the logs, I did not find any issue about anything.

 

Could you help to search what is wrong ?

 

Thanks for the support.

 

The last lines of Xorg.0.log:

 

[    27.528] (II) XINPUT: Adding extended input device "AlpsPS/2 ALPS DualPoint TouchPad" (type: TOUCHPAD, id 16)

[    27.528] (**) synaptics: AlpsPS/2 ALPS DualPoint TouchPad: (accel) MinSpeed is now constant deceleration 2.5

[    27.528] (**) synaptics: AlpsPS/2 ALPS DualPoint TouchPad: (accel) MaxSpeed is now 1.75

[    27.528] (**) synaptics: AlpsPS/2 ALPS DualPoint TouchPad: (accel) AccelFactor is now 0.082

[    27.528] (**) AlpsPS/2 ALPS DualPoint TouchPad: (accel) keeping acceleration scheme 1

[    27.528] (**) AlpsPS/2 ALPS DualPoint TouchPad: (accel) acceleration profile 1

[    27.528] (**) AlpsPS/2 ALPS DualPoint TouchPad: (accel) acceleration factor: 2.000

[    27.528] (**) AlpsPS/2 ALPS DualPoint TouchPad: (accel) acceleration threshold: 4

[    27.528] (--) synaptics: AlpsPS/2 ALPS DualPoint TouchPad: touchpad found

[    27.528] (II) config/udev: Adding input device AlpsPS/2 ALPS DualPoint TouchPad (/dev/input/mouse3)

[    27.528] (**) AlpsPS/2 ALPS DualPoint TouchPad: Ignoring device from InputClass "touchpad ignore duplicates"

[    27.529] (II) config/udev: Adding input device Dell WMI hotkeys (/dev/input/event17)

[    27.529] (**) Dell WMI hotkeys: Applying InputClass "evdev keyboard catchall"

[    27.529] (II) Using input driver 'evdev' for 'Dell WMI hotkeys'

[    27.529] (**) Dell WMI hotkeys: always reports core events

[    27.529] (**) evdev: Dell WMI hotkeys: Device: "/dev/input/event17"

[    27.529] (--) evdev: Dell WMI hotkeys: Vendor 0 Product 0

[    27.529] (--) evdev: Dell WMI hotkeys: Found keys

[    27.529] (II) evdev: Dell WMI hotkeys: Configuring as keyboard

[    27.529] (**) Option "config_info" "udev:/sys/devices/virtual/input/input18/event17"

[    27.529] (II) XINPUT: Adding extended input device "Dell WMI hotkeys" (type: KEYBOARD, id 17)

[    27.529] (**) Option "xkb_rules" "evdev"

[    27.529] (**) Option "xkb_model" "latitude"

[    27.529] (**) Option "xkb_layout" "br"

[    27.529] (**) Option "xkb_options" "lv3:ralt_switch,terminate:ctrl_alt_bksp"

[    28.728] (II) intel(0): EDID vendor "AUO", prod id 12604

[    28.728] (II) intel(0): Printing DDC gathered Modelines:

[    28.728] (II) intel(0): Modeline "1366x768"x0.0   76.60  1366 1404 1426 1598  768 771 777 798 +hsync -vsync (47.9 kHz eP)

[    28.728] (II) intel(0): Modeline "1366x768"x0.0   51.07  1366 1404 1426 1598  768 771 777 798 +hsync -vsync (32.0 kHz e)

[    63.062] (II) XKB: reuse xkmfile /var/lib/xkb/server-BE8A21F12E6029A738FAC533801952C856256720.xkm

[    64.216] (II) XKB: reuse xkmfile /var/lib/xkb/server-54D17D660405DF835DD9766183259952953CBF9F.xkm

[    64.225] (II) XKB: reuse xkmfile /var/lib/xkb/server-54D17D660405DF835DD9766183259952953CBF9F.xkm

[    67.654] (II) XKB: reuse xkmfile /var/lib/xkb/server-5DA4DE08A11F9C5C7D4ACC3D329CCFED1BFB57C4.xkm

[  3879.220] (II) AIGLX: Suspending AIGLX clients for VT switch

 

 

Syslog: