I've installed 

linux-image-3.13.0-39-generic and linux-image-extra-3.13.0-39-generic, 

$ sudo apt-get install linux-image-3.13.0-39-generic linux-image-extra-3.13.0-39-generic
Czytanie list pakietów... Gotowe
Budowanie drzewa zależności       
Odczyt informacji o stanie... Gotowe
linux-image-3.13.0-39-generic jest już w najnowszej wersji.
linux-image-extra-3.13.0-39-generic jest już w najnowszej wersji.
0 aktualizowanych, 0 nowo instalowanych, 0 usuwanych i 16 nieaktualizowanych.
3.13.0-40-generic

but I dont know how can I switch my 3 X I have 3 X Dell UltraSharp U2414H LED IPS connected form one Display Port in serial

graphic_card_out-1monitor_DisplayPort_in/1monitor_DisplayPort_out-2monitor_DisplayPort_in/2monitor_DisplayPort_out-3monitor_DisplayPort_in

I have still same picture on each monitor.
In setup Ubuntu window I see only one monitor detected.

What should I do nest to have fill MultiPort environment ?

$ uname -r
3.13.0-40-generic

$ lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850]

$ xrandr 
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
DFP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 527mm x 296mm
   1920x1080      60.0*+   50.0     59.9     60.1     50.0     24.0     60.0  
   1600x1200      60.0  
   1776x1000      50.0     59.9     50.0     24.0     60.0  
   1680x1050      60.0     50.0     59.9     24.0  
   1400x1050      60.0     50.0     24.0  
   1600x900       50.0     60.0     24.0  
   1280x1024      50.0     75.0     60.0     24.0  
   1440x900       50.0     60.0     24.0  
   1280x960       50.0     75.0     60.0     24.0  
   1152x864       50.0     59.9     75.0     24.0  
   1280x768       50.0     75.0     60.0     24.0  
   1280x720       60.0     50.0     24.0     59.9  
   1024x768       50.0     75.0     24.0     60.0  
   1152x648       50.0     59.9  
   800x600        50.0     24.0     75.0     60.3  
   720x480        50.0     24.0     60.0     59.9  
   640x480        50.0     24.0     75.0     59.9  
DFP2 disconnected (normal left inverted right x axis y axis)
DFP3 disconnected (normal left inverted right x axis y axis)
DFP4 disconnected (normal left inverted right x axis y axis)
DFP5 disconnected (normal left inverted right x axis y axis)
DFP6 disconnected (normal left inverted right x axis y axis)
DFP7 disconnected (normal left inverted right x axis y axis)
CRT1 disconnected (normal left inverted right x axis y axis)

$ sudo lspci -vv
...
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn PRO [Radeon HD 7850] (prog-if 00 [VGA controller])
	Subsystem: ASUSTeK Computer Inc. Device 042c
	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
	Latency: 0, Cache Line Size: 64 bytes
	Interrupt: pin A routed to IRQ 48
	Region 0: Memory at e0000000 (64-bit, prefetchable) [size=256M]
	Region 2: Memory at f7e00000 (64-bit, non-prefetchable) [size=256K]
	Region 4: I/O ports at e000 [size=256]
	Expansion ROM at f7e40000 [disabled] [size=128K]
	Capabilities: [48] Vendor Specific Information: Len=08 <?>
	Capabilities: [50] Power Management version 3
		Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0-,D1+,D2+,D3hot+,D3cold-)
		Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
	Capabilities: [58] Express (v2) Legacy Endpoint, MSI 00
		DevCap:	MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1 unlimited
			ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
		DevCtl:	Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
			RlxdOrd- ExtTag+ PhantFunc- AuxPwr- NoSnoop+
			MaxPayload 256 bytes, MaxReadReq 512 bytes
		DevSta:	CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
		LnkCap:	Port #0, Speed 8GT/s, Width x16, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
			ClockPM- Surprise- LLActRep- BwNot-
		LnkCtl:	ASPM Disabled; RCB 64 bytes Disabled- CommClk+
			ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
		LnkSta:	Speed 2.5GT/s, Width x16, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
		DevCap2: Completion Timeout: Not Supported, TimeoutDis-, LTR-, OBFF Not Supported
		DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR-, OBFF Disabled
		LnkCtl2: Target Link Speed: 8GT/s, EnterCompliance- SpeedDis-
			 Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
			 Compliance De-emphasis: -6dB
		LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete+, EqualizationPhase1+
			 EqualizationPhase2+, EqualizationPhase3+, LinkEqualizationRequest-
	Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
		Address: 00000000fee003f8  Data: 0000
	Capabilities: [100 v1] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
	Capabilities: [150 v2] Advanced Error Reporting
		UESta:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
		UEMsk:	DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
		UESvrt:	DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
		CESta:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
		CEMsk:	RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
		AERCap:	First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
	Capabilities: [270 v1] #19
	Capabilities: [2b0 v1] Address Translation Service (ATS)
		ATSCap:	Invalidate Queue Depth: 00
		ATSCtl:	Enable-, Smallest Translation Unit: 00
	Capabilities: [2c0 v1] #13
	Capabilities: [2d0 v1] #1b
	Kernel driver in use: fglrx_pci