Ubuntu – AMD GPU not detected in Ubuntu 16.04

So I finally dual booted Windows 10 with Ubuntu 16.04. I have been running Xubuntu on my secondary laptop around 5-6 months and now decided to install it on my main laptop so far Ubuntu runs great but there's only one issue: I can't see my dedicated GPU [AMD Radeon 8670M] it only shows my Intel Integrated GPU [Intel HD Graphics 4400]. On Additional drivers section there are only Intel Proprietary Drivers.

Here are the Commands I ran :

$ sudo lshw -c video

 *-display               
       description: VGA compatible controller
       product: Haswell-ULT Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:44 memory:c2000000-c23fffff memory:b0000000-bfffffff ioport:6000(size=64)**

and

$ lspci -nn | grep VGA

00:02.0 VGA compatible controller [0300]: Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09)

and

$ dmesg | egrep "radeon|drm"

[    1.345817] [drm] Initialized drm 1.1.0 20060810
[    1.386931] [drm] Memory usable by graphics device = 2048M
[    1.386937] fb: switching to inteldrmfb from VESA VGA
[    1.387046] [drm] Replacing VGA console driver
[    1.391211] [drm] radeon kernel modesetting enabled.
[    1.395226] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.395229] [drm] Driver supports precise vblank timestamp query.
[    1.398577] radeon 0000:0a:00.0: enabling device (0006 -> 0007)
[    1.424927] [drm] Initialized i915 1.6.0 20151010 for 0000:00:02.0 on minor 0
[    1.425088] [drm] initializing kernel modesetting (HAINAN 0x1002:0x6660 0x103C:0x2164).
[    1.425101] [drm] register mmio base: 0xC2400000
[    1.425102] [drm] register mmio size: 262144
[    1.429954] radeon 0000:0a:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
[    1.429956] radeon 0000:0a:00.0: GTT: 2048M 0x0000000040000000 - 0x00000000BFFFFFFF
[    1.429957] [drm] Detected VRAM RAM=1024M, BAR=256M
[    1.429958] [drm] RAM width 64bits DDR
[    1.430106] [drm] radeon: 1024M of VRAM memory ready
[    1.430107] [drm] radeon: 2048M of GTT memory ready.
[    1.430116] [drm] Loading hainan Microcode
[    1.430197] [drm] Internal thermal controller without fan control
[    1.430254] [drm] probing gen 2 caps for device 8086:9c18 = 5323c42/0
[    1.438512] [drm] radeon: dpm initialized
[    1.438518] [drm] GART: num cpu pages 524288, num gpu pages 524288
[    1.439806] [drm] probing gen 2 caps for device 8086:9c18 = 5323c42/0
[    1.439810] [drm] PCIE gen 2 link speeds already enabled
[    1.442772] [drm] PCIE GART of 2048M enabled (table at 0x0000000000040000).
[    1.442964] radeon 0000:0a:00.0: WB enabled
[    1.442967] radeon 0000:0a:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff8800355bec00
[    1.442968] radeon 0000:0a:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 and cpu addr 0xffff8800355bec04
[    1.442970] radeon 0000:0a:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 and cpu addr 0xffff8800355bec08
[    1.442971] radeon 0000:0a:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff8800355bec0c
[    1.442973] radeon 0000:0a:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 and cpu addr 0xffff8800355bec10
[    1.442974] radeon 0000:0a:00.0: VCE init error (-22).
[    1.442976] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    1.442977] [drm] Driver supports precise vblank timestamp query.
[    1.442979] radeon 0000:0a:00.0: radeon: MSI limited to 32-bit
[    1.443009] radeon 0000:0a:00.0: radeon: using MSI.
[    1.443040] [drm] radeon: irq initialized.
[    1.551879] fbcon: inteldrmfb (fb0) is primary device
[    1.551995] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
[    1.680395] [drm] ring test on 0 succeeded in 1 usecs
[    1.680403] [drm] ring test on 1 succeeded in 1 usecs
[    1.680419] [drm] ring test on 2 succeeded in 0 usecs
[    1.680428] [drm] ring test on 3 succeeded in 4 usecs
[    1.680436] [drm] ring test on 4 succeeded in 4 usecs
[    1.680715] [drm] ib test on ring 0 succeeded in 0 usecs
[    1.680744] [drm] ib test on ring 1 succeeded in 0 usecs
[    1.680771] [drm] ib test on ring 2 succeeded in 0 usecs
[    1.680792] [drm] ib test on ring 3 succeeded in 0 usecs
[    1.680813] [drm] ib test on ring 4 succeeded in 0 usecs
[    1.681381] [drm] Radeon Display Connectors
[    1.682905] [drm] Initialized radeon 2.43.0 20080528 for 0000:0a:00.0 on minor 1
[   21.205885] [drm] probing gen 2 caps for device 8086:9c18 = 5323c42/0
[   21.205890] [drm] PCIE gen 2 link speeds already enabled
[   21.212077] [drm] PCIE GART of 2048M enabled (table at 0x0000000000040000).
[   21.212176] radeon 0000:0a:00.0: WB enabled
[   21.212178] radeon 0000:0a:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff8800355bec00
[   21.212180] radeon 0000:0a:00.0: fence driver on ring 1 use gpu addr 0x0000000040000c04 and cpu addr 0xffff8800355bec04
[   21.212181] radeon 0000:0a:00.0: fence driver on ring 2 use gpu addr 0x0000000040000c08 and cpu addr 0xffff8800355bec08
[   21.212183] radeon 0000:0a:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff8800355bec0c
[   21.212184] radeon 0000:0a:00.0: fence driver on ring 4 use gpu addr 0x0000000040000c10 and cpu addr 0xffff8800355bec10
[   21.212186] radeon 0000:0a:00.0: VCE init error (-22).
[   21.448861] [drm] ring test on 0 succeeded in 1 usecs
[   21.448866] [drm] ring test on 1 succeeded in 1 usecs
[   21.448872] [drm] ring test on 2 succeeded in 1 usecs
[   21.448880] [drm] ring test on 3 succeeded in 4 usecs
[   21.448887] [drm] ring test on 4 succeeded in 4 usecs
[   21.448951] [drm] ib test on ring 0 succeeded in 0 usecs
[   21.449007] [drm] ib test on ring 1 succeeded in 0 usecs
[   21.449062] [drm] ib test on ring 2 succeeded in 0 usecs
[   21.449076] [drm] ib test on ring 3 succeeded in 0 usecs
[   21.449090] [drm] ib test on ring 4 succeeded in 0 usecs

EDIT: Formatting