[ubuntu] My AMD gpu s not displayed in the details window

I have recenly installed ubuntu 16 on my laptop with amd gpu and intel integrated chipset but my amd gpu is disabled. Is there any way to use AMG gpu by default.
GPU details are isted below.
ilspci output is
00:00.0 Host bridge [0600]: Intel Corporation Haswell-ULT DRAM Controller [8086:0a04] (rev 0b)
Subsystem: Lenovo Haswell-ULT DRAM Controller [17aa:3978]
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>
Keel driver in use: hsw_uncore

00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
Subsystem: Lenovo Haswell-ULT Integrated Graphics Controller [17aa:380c]
Flags: bus master, fast devsel, latency 0, IRQ 48
Memory at d0000000 (64-bit, non-prefetchable) [size=4M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 5000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Keel driver in use: i915
Keel modules: i915

00:03.0 Audio device [0403]: Intel Corporation Haswell-ULT HD Audio Controller [8086:0a0c] (rev 0b)
Subsystem: Lenovo Haswell-ULT HD Audio Controller [17aa:3978]
Flags: bus master, fast devsel, latency 0, IRQ 52
Memory at d0710000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Keel driver in use: snd_hda_intel
Keel modules: snd_hda_intel

00:14.0 USB controller [0c03]: Intel Corporation 8 Series USB xHCI HC [8086:9c31] (rev 04) (prog-if 30 [XHCI])
Subsystem: Lenovo 8 Series USB xHCI HC [17aa:3978]
Flags: bus master, medium devsel, latency 0, IRQ 45
Memory at d0700000 (64-bit, non-prefetchable) [size=64K]
Capabilities: <access denied>
Keel driver in use: xhci_hcd

00:16.0 Communication controller [0780]: Intel Corporation 8 Series HECI #0 [8086:9c3a] (rev 04)
Subsystem: Lenovo 8 Series HECI [17aa:3978]
Flags: bus master, fast devsel, latency 0, IRQ 50
Memory at d0718000 (64-bit, non-prefetchable) [size=32]
Capabilities: <access denied>
Keel driver in use: mei_me
Keel modules: mei_me

00:1b.0 Audio device [0403]: Intel Corporation 8 Series HD Audio Controller [8086:9c20] (rev 04)
Subsystem: Lenovo 8 Series HD Audio Controller [17aa:3978]
Flags: bus master, fast devsel, latency 0, IRQ 51
Memory at d0714000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Keel driver in use: snd_hda_intel
Keel modules: snd_hda_intel

00:1c.0 PCI bridge [0604]: Intel Corporation 8 Series PCI Express Root Port 3 [8086:9c14] (rev e4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 42
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 00004000-00004fff
Memory behind bridge: d0600000-d06fffff
Capabilities: <access denied>
Keel driver in use: pcieport
Keel modules: shpchp

00:1c.3 PCI bridge [0604]: Intel Corporation 8 Series PCI Express Root Port 4 [8086:9c16] (rev e4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 43
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Memory behind bridge: d0500000-d05fffff
Capabilities: <access denied>
Keel driver in use: pcieport
Keel modules: shpchp

00:1c.4 PCI bridge [0604]: Intel Corporation 8 Series PCI Express Root Port 5 [8086:9c18] (rev e4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 44
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: 00003000-00003fff
Memory behind bridge: d0400000-d04fffff
Prefetchable memory behind bridge: 00000000b0000000-00000000bfffffff
Capabilities: <access denied>
Keel driver in use: pcieport
Keel modules: shpchp

00:1d.0 USB controller [0c03]: Intel Corporation 8 Series USB EHCI #1 [8086:9c26] (rev 04) (prog-if 20 [EHCI])
Subsystem: Lenovo 8 Series USB EHCI [17aa:3978]
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at d071c000 (32-bit, non-prefetchable) [size=1K]
Capabilities: <access denied>
Keel driver in use: ehci-pci

00:1f.0 ISA bridge [0601]: Intel Corporation 8 Series LPC Controller [8086:9c43] (rev 04)
Subsystem: Lenovo 8 Series LPC Controller [17aa:3978]
Flags: bus master, medium devsel, latency 0
Capabilities: <access denied>
Keel driver in use: lpc_ich
Keel modules: lpc_ich

00:1f.2 SATA controller [0106]: Intel Corporation 8 Series SATA Controller 1 [AHCI mode] [8086:9c03] (rev 04) (prog-if 01 [AHCI 1.0])
Subsystem: Lenovo 8 Series SATA Controller 1 [AHCI mode] [17aa:3978]
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 46
I/O ports at 5088 [size=8]
I/O ports at 5094 [size=4]
I/O ports at 5080 [size=8]
I/O ports at 5090 [size=4]
I/O ports at 5060 [size=32]
Memory at d071b000 (32-bit, non-prefetchable) [size=2K]
Capabilities: <access denied>
Keel driver in use: ahci
Keel modules: ahci

00:1f.3 SMBus [0c05]: Intel Corporation 8 Series SMBus Controller [8086:9c22] (rev 04)
Subsystem: Lenovo 8 Series SMBus Controller [17aa:3978]
Flags: medium devsel, IRQ 11
Memory at d0719000 (64-bit, non-prefetchable) [size=256]
I/O ports at 5040 [size=32]
Keel modules: i2c_i801

01:00.0 Etheet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Etheet Controller [10ec:8168] (rev 10)
Subsystem: Lenovo RTL8111/8168/8411 PCI Express Gigabit Etheet Controller [17aa:380a]
Flags: bus master, fast devsel, latency 0, IRQ 47
I/O ports at 4000 [size=256]
Memory at d0604000 (64-bit, non-prefetchable) [size=4K]
Memory at d0600000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Keel driver in use: r8169
Keel modules: r8169

02:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01)
Subsystem: Lenovo BCM43142 802.11b/g/n [17aa:0621]
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at d0500000 (64-bit, non-prefetchable) [size=32K]
Capabilities: <access denied>
Keel driver in use: wl
Keel modules: bcma, wl

03:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Sun LE [Radeon HD 8550M / R5 M230] [1002:666f]
Subsystem: Lenovo Sun LE [Radeon HD 8550M / R5 M230] [17aa:380c]
Flags: fast devsel, IRQ 49
Memory at b0000000 (64-bit, prefetchable) [size=256M]
Memory at d0400000 (64-bit, non-prefetchable) [size=256K]
I/O ports at 3000 [size=256]
Expansion ROM at d0440000 [disabled] [size=128K]
Capabilities: <access denied>
Keel driver in use: radeon
Keel modules: radeon