sorry, mein Fehler!
lspci -nnk | grep "VGA\|'Kern'\|3D\|Display" -A2
chef@chef-HP:~$ lspci -nnk | grep "VGA\|'Kern'\|3D\|Display" -A2
00:02.0 VGA compatible controller [0300]: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06)
Subsystem: Hewlett-Packard Company Device [103c:1978]
Kernel driver in use: i915
--
01:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Sun XT [Radeon HD 8670A/8670M/8690M] [1002:6660] (rev ff)
Kernel driver in use: radeon
07:00.0 Network controller [0280]: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter [10ec:8179] (rev 01)
chef@chef-HP:~$
xrandr --prop
Screen 0: minimum 8 x 8, current 1600 x 900, maximum 32767 x 32767
eDP1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 382mm x 214mm
EDID:
00ffffffffffff0006af9e1500000000
001601049026157802c4959e57539226
0f505400000001010101010101010101
0101010101011c2a404a61841c303020
36007ed610000018131c404a61841c30
302036007ed610000018000000000000
00000000000000000000000000000002
000c49ff0c3c6e1e1e376e20202000e6
BACKLIGHT: 4882
range: (0, 4882)
Backlight: 4882
range: (0, 4882)
scaling mode: Full aspect
supported: None, Full, Center, Full aspect
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
1600x900 60.2*+ 40.1
1440x900 59.9
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
VIRTUAL1 disconnected (normal left inverted right x axis y axis)