Danke für den Hinweis.
Hab die Abfragen gemacht:
:~$ lspci -nnk | grep "VGA\|'Kern'\|3D\|Display" -A2
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Hawaii PRO [Radeon R9 290] [1002:67b1]
Subsystem: PC Partner Limited / Sapphire Technology Device [174b:e283]
Kernel driver in use: radeon
:~$ xrandr --prop
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
audio: auto
supported: off, on, auto
scaling mode: None
supported: None, Full, Center, Full aspect
dither: off
supported: off, on
underscan vborder: 0
range: (0, 128)
underscan hborder: 0
range: (0, 128)
underscan: off
supported: off, on, auto
coherent: 1
range: (0, 1)
HDMI-0 disconnected (normal left inverted right x axis y axis)
audio: auto
supported: off, on, auto
scaling mode: None
supported: None, Full, Center, Full aspect
dither: off
supported: off, on
underscan vborder: 0
range: (0, 128)
underscan hborder: 0
range: (0, 128)
underscan: off
supported: off, on, auto
coherent: 1
range: (0, 1)
DVI-0 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 598mm x 336mm
EDID:
00ffffffffffff0026cd116686090000
0a180103803c22782a2fa5a554509e27
105054330800710081408180a940b300
9500d1c00101023a801871382d40582c
450056502100001e000000ff00313132
38323431303032343338000000fd0037
4c1e5311000a202020202020000000fc
00504c5832373833480a202020200012
audio: auto
supported: off, on, auto
scaling mode: None
supported: None, Full, Center, Full aspect
dither: off
supported: off, on
underscan vborder: 0
range: (0, 128)
underscan hborder: 0
range: (0, 128)
underscan: off
supported: off, on, auto
coherent: 1
range: (0, 1)
1920x1080 60.0 +
1600x1200 60.0
1680x1050 59.9*
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1152x720 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 66.7 60.0
DVI-1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
EDID:
00ffffffffffff001e6d6f5665a50600
0a130103ea312078ea56b5a7573baa26
0f5054a76b80950081808140714f0101
0101010101017c2e90a0601a1e403020
3600da281100001a21399030621a2740
68b03600da281100001c000000fd0038
4b1e530f000a202020202020000000fc
004c323237570a2020202020202000a3
audio: auto
supported: off, on, auto
scaling mode: None
supported: None, Full, Center, Full aspect
dither: off
supported: off, on
underscan vborder: 0
range: (0, 128)
underscan hborder: 0
range: (0, 128)
underscan: off
supported: off, on, auto
coherent: 1
range: (0, 1)
1680x1050 59.9*+ 60.0
1280x1024 75.0 60.0
1440x900 59.9
1280x960 60.0
1152x864 75.0
1024x768 75.1 60.0
832x624 74.6
800x600 75.0 60.3 56.2
640x480 75.0 60.0
720x400 70.1