Darf aber dennoch die Angaben hier posten, die Tids als Abfrage im vorgeschlagen hat:
xrandr --prop
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
HDMI-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 575mm x 323mm
EDID:
00ffffffffffff000ed4030000000000
1014010380643d008aee95a3544c9926
0f5054a54e0001010101010101010101
010101010101023a801871382d40582c
45003f432100001a000000fd0018550f
5010000a202020202020000000fc0043
5654452054560a202020202000000000
0000000000000000000000000000015d
020323744f90050403070206011f1413
12161115230907038301000066030c00
100080011d00bc52d01e20b8285540c4
8e2100001e011d80d0721c1620102c25
80c48e2100009e8c0ad08a20e02d1010
3e9600138e210000188c0ad090204031
200c405500138e210000180000000000
000000000000000000000000000000a5
output_csc: bypass
supported: bypass, tvrgb, ycbcr601, ycbcr709
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 60.00*+ 60.00 50.00 59.94
1920x1080i 60.00 50.00 59.94
1280x720 60.00 50.00 59.94
1024x768 75.08 70.07 60.00
800x600 75.00 60.32
720x576 50.00
720x576i 50.00
720x480 60.00 59.94
720x480i 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
VGA-0 disconnected (normal left inverted right x axis y axis)
output_csc: bypass
supported: bypass, tvrgb, ycbcr601, ycbcr709
scaling mode: None
supported: None, Full, Center, Full aspect
load detection: 1
range: (0, 1)
DVI-0 disconnected (normal left inverted right x axis y axis)
output_csc: bypass
supported: bypass, tvrgb, ycbcr601, ycbcr709
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)
cat /etc/X11/xorg.conf
Section "Device"
Identifier "Configured Video Device"
Driver "radeon"
ls -la /etc/X11/xorg.conf.d/
ls: Zugriff auf '/etc/X11/xorg.conf.d/' nicht möglich: Datei oder Verzeichnis nicht gefunden
ls -la /usr/share/X11/xorg.conf.d
insgesamt 44
drwxr-xr-x 2 root root 4096 Mai 3 23:42 .
drwxr-xr-x 5 root root 4096 Mai 3 23:41 ..
-rw-r--r-- 1 root root 92 Apr 8 12:11 10-amdgpu.conf
-rw-r--r-- 1 root root 1099 Mär 3 13:33 10-evdev.conf
-rw-r--r-- 1 root root 1350 Apr 7 11:24 10-quirks.conf
-rw-r--r-- 1 root root 590 Mär 3 13:32 11-evdev-quirks.conf
-rw-r--r-- 1 root root 364 Mär 3 13:32 11-evdev-trackpoint.conf
-rw-r--r-- 1 root root 1751 Mär 3 14:41 50-synaptics.conf
-rw-r--r-- 1 root root 115 Mär 3 14:42 50-vmmouse.conf
-rw-r--r-- 1 root root 1385 Mär 3 12:47 50-wacom.conf
-rw-r--r-- 1 root root 590 Mär 3 14:41 51-synaptics-quirks.conf
cat /var/log/Xorg.0.log
[ 21.414]
X.Org X Server 1.18.3
Release Date: 2016-04-04
[ 21.414] X Protocol Version 11, Revision 0
[ 21.414] Build Operating System: Linux 3.13.0-85-generic x86_64 Ubuntu
[ 21.414] Current Operating System: Linux sandra-MS-7721 4.4.0-21-generic #37-Ubuntu SMP Mon Apr 18 18:33:37 UTC 2016 x86_64
[ 21.415] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=13d437c6-ce5d-4635-b61a-a0ce8b8ddfb1 ro quiet splash vt.handoff=7
[ 21.415] Build Date: 07 April 2016 09:18:50AM
[ 21.415] xorg-server 2:1.18.3-1ubuntu2 (For technical support please see http://www.ubuntu.com/support)
[ 21.415] Current version of pixman: 0.33.6
[ 21.415] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 21.415] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 21.415] (==) Log file: "/var/log/Xorg.0.log", Time: Wed May 4 00:12:00 2016
[ 21.462] (==) Using config file: "/etc/X11/xorg.conf"
[ 21.462] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
... dann wird's richtig ellenlang.