我在配备 Dell U2713hm 显示器的 Dell Latitude E6540 上使用 Linux Mint 17.1 Cinnamon，显示器没有镜像，并且彼此相邻排列。该显示器的宽高比为 16:9，但是 Linux Mint 将其识别为 16:10 显示器，因此我只能选择 16:10 分辨率（或 4:3 分辨率）。这让一切看起来都很糟糕。在Windows 7下，显示器被正确识别，分辨率为1920 x 1080，在Linux Mint下我只能得到1920 x 1200。
这就是 xrandr -- 查询给我的：
xrandr --query
Screen 0: minimum 320 x 200, current 3840 x 1200, maximum 32767 x 32767
eDP1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 344mm x 194mm
1920x1080 60.0*+ 59.9 40.0
1680x1050 60.0 59.9
1600x1024 60.2
1400x1050 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1360x768 59.8 60.0
1152x864 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA2 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
HDMI3 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 597mm x 336mm
1920x1200 60.0*
1600x1200 60.0
1680x1050 59.9
1280x1024 75.0 60.0
1280x800 59.9
1152x864 75.0
1024x768 75.1 60.0
800x600 75.0 60.3
640x480 75.0 60.0
720x400 70.1
VIRTUAL1 disconnected (normal left inverted right x axis y axis)
VGA-1-0 disconnected
我该如何解决这个问题？