fglrx driver on 7020 (Z50Q) with Radeon HD 8400E Chipset

Hi,

I tried to install the proprietary fglrx-Driver on my Z50Q running "Ubuntu mate 16.04".

The installation works fine but after a reboot I got no graphic output. The screen is always black :(

Here is the xorg.log:

[   155.227] (--) PCI:*(0:0:1:0) 1002:9831:1002:0123 rev 0, Mem @ 0xe0000000/268435456, 0xf0000000/8388608, 0xf0900000/262144, I/O @ 0x00002000/256, BIOS @ 0x????????/131072
[   155.227] (II) "glx" will be loaded by default.
[   155.227] (II) LoadModule: "glx"
[   155.228] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/modules/extensions/libglx.so
[   155.228] (II) Module glx: vendor="Advanced Micro Devices, Inc."
[   155.228]     compiled for 6.9.0, module version = 1.0.0
[   155.228] (II) LoadModule: "fglrx"
[   155.228] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/modules/drivers/fglrx_drv.so
[   155.275] (II) Module fglrx: vendor="FireGL - AMD Technologies Inc."
[   155.275]     compiled for 1.4.99.906, module version = 15.30.3
[   155.275]     Module class: X.Org Video Driver
[   155.275] (II) Loading sub module "fglrxdrm"
[   155.275] (II) LoadModule: "fglrxdrm"
[   155.275] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/modules/linux/libfglrxdrm.so
[   155.276] (II) Module fglrxdrm: vendor="FireGL - AMD Technologies Inc."
[   155.276]     compiled for 1.4.99.906, module version = 15.30.3
[   155.276] (II) AMD Proprietary Linux Driver Version Identifier:15.30.3
[   155.276] (II) AMD Proprietary Linux Driver Release Identifier: 15.302.1101                          
[   155.276] (II) AMD Proprietary Linux Driver Build Date: Dec 14 2015 22:26:51
[   155.278] (WW) Falling back to old probe method for fglrx
[   155.285] (II) Loading PCS database from /etc/ati/amdpcsdb /etc/ati/amdpcsdb.default
[   155.288] ukiDynamicMajor: failed to open /proc/ati/major
[   155.288] ukiDynamicMajor: failed to open /proc/ati/major
[   155.289] (--) Chipset Supported AMD Graphics Processor (0x9831) found
[   155.289] (WW) fglrx: No matching Device section for instance (BusID PCI:0@0:1:1) found
[   155.290] (II) fglrx(0): pEnt->device->identifier=0x562b4a9d5820
[   155.290] (II) fglrx(0): === [xdl_xs117_atiddxPreInit] === begin
[   155.290] (II) fglrx(0): FB driver is not enabled
[   155.290] (II) Loading sub module "vgahw"
[   155.290] (II) LoadModule: "vgahw"
[   155.290] (II) Loading /usr/lib/xorg/modules/libvgahw.so
[   155.291] (II) Module vgahw: vendor="X.Org Foundation"
[   155.291]     compiled for 1.18.3, module version = 0.1.0
[   155.291]     ABI class: X.Org Video Driver, version 20.0
[   155.291] (**) fglrx(0): Depth 24, (--) framebuffer bpp 32
[   155.291] (II) fglrx(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)
[   155.291] (==) fglrx(0): Default visual is TrueColor
[   155.291] (**) fglrx(0): Option "DPMS" "true"
[   155.291] (==) fglrx(0): RGB weight 888
[   155.291] (II) fglrx(0): Using 8 bits per RGB
[   155.291] (==) fglrx(0): Buffer Tiling is ON
[   155.291] (II) Loading sub module "fglrxdrm"
[   155.291] (II) LoadModule: "fglrxdrm"
[   155.291] (II) Loading /usr/lib/x86_64-linux-gnu/xorg/extra-modules/modules/linux/libfglrxdrm.so
[   155.291] (II) Module fglrxdrm: vendor="FireGL - AMD Technologies Inc."
[   155.291]     compiled for 1.4.99.906, module version = 15.30.3
[   155.294] ukiDynamicMajor: failed to open /proc/ati/major
[   155.294] ukiDynamicMajor: failed to open /proc/ati/major
[   155.295] (**) fglrx(0): NoAccel = NO
[   155.295] (**) fglrx(0): AMD 2D Acceleration Architecture enabled
[   155.295] (--) fglrx(0): Chipset: "AMD Radeon(TM) HD 8400E" (Chipset = 0x9831)
[   155.295] (--) fglrx(0): (PciSubVendor = 0x1002, PciSubDevice = 0x0123)
[   155.295] (==) fglrx(0): board vendor info: original AMD graphics adapter
[   155.295] (--) fglrx(0): Linear framebuffer (phys) at 0xe0000000
[   155.295] (--) fglrx(0): MMIO registers at 0xf0900000
[   155.295] (--) fglrx(0): I/O port at 0x00002000
[   155.295] (==) fglrx(0): ROM-BIOS at 0x000c0000
[   155.331] (II) fglrx(0): Primary V_BIOS segment is: 0xc000
[   155.456] (II) Loading sub module "vbe"
[   155.456] (II) LoadModule: "vbe"
[   155.457] (II) Loading /usr/lib/xorg/modules/libvbe.so
[   155.457] (II) Module vbe: vendor="X.Org Foundation"
[   155.457]     compiled for 1.18.3, module version = 1.1.0
[   155.457]     ABI class: X.Org Video Driver, version 20.0
[   155.458] (II) fglrx(0): VESA BIOS detected
[   155.458] (II) fglrx(0): VESA VBE Version 3.0
[   155.458] (II) fglrx(0): VESA VBE Total Mem: 16384 kB
[   155.458] (II) fglrx(0): VESA VBE OEM: AMD ATOMBIOS
[   155.458] (II) fglrx(0): VESA VBE OEM Software Rev: 15.33
[   155.458] (II) fglrx(0): VESA VBE OEM Vendor: (C) 1988-2010, Advanced Micro Devices, Inc.
[   155.458] (II) fglrx(0): VESA VBE OEM Product: KALINDI
[   155.458] (II) fglrx(0): VESA VBE OEM Product Rev: 01.00
[   158.473] (EE) fglrx(0): CAIL: CAIL_ASICSetup failed, error 1
[   158.473] (EE) fglrx(0): GetBIOSParameter failed
[   158.473] (EE) fglrx(0): PreInitAdapter failed
[   158.473] (EE) fglrx(0): PreInit failed
[   158.473] (II) fglrx(0): === [xdl_xs117_atiddxPreInit] === end
[   158.621] (II) UnloadModule: "fglrx"
[   158.621] (II) UnloadSubModule: "vbe"
[   158.621] (II) Unloading vbe
[   158.621] (II) UnloadSubModule: "fglrxdrm"
[   158.621] (II) Unloading fglrxdrm
[   158.621] (II) UnloadSubModule: "vgahw"
[   158.621] (II) Unloading vgahw
[   158.621] (II) UnloadSubModule: "fglrxdrm"
[   158.621] (EE) Screen(s) found, but none have a usable configuration.
[   158.621] (EE)
Fatal server error:
[   158.621] (EE) no screens found(EE)
[   158.622] (EE)
Please consult the The X.Org Foundation support
     at http://wiki.x.org
 for help.
[   158.622] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[   158.622] (EE)

What's going wrong???