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I've got a new (used) external 1920x1200 display that I'm trying to get working with my Thinkpad's builtin 1920x1080 display. The output of xrandr is below.

In Settings >> Display, I see my builtin set as primary @1920x1080 and my external set as secondary @1920x1200. Oddly, the effect is that the displays are mirrored, though the external has an empty bar on the bottom (those 120 extra vertical pixels) with the retracting task bar located part way up from the bottom. I can move windows into that 120px area, but that causes some odd behavior when I move windows between workspaces.

If instead I use Settings >> Display to "Mirror" the displays, the best resolution I'm offered is 1680x1050. Note that the specs for the external display say: "Images of 1920x1080 resolution are forcibly enlarged to full-screen (1920x1200)," but xrandr doesn't show 1920x1080 as an option.

Is there some way I can mirror these as 1920x1080 displays?


~$ xrandr Screen 0: minimum 8 x 8, current 1920 x 1200, maximum 32767 x 32767 LVDS2 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1920x1080 60.00*+ 59.93 50.00
1680x1050 59.95 59.88
1600x1024 60.17
1400x1050 59.98
1600x900 60.00
1280x1024 60.02
1440x900 59.89
1280x960 60.00
1368x768 60.00
1360x768 59.80 59.96
1152x864 60.00
1280x720 60.00
1024x768 60.00
1024x576 60.00
960x540 60.00
800x600 60.32 56.25
864x486 60.00
640x480 59.94
720x405 60.00
640x360 60.00
VGA2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis) LVDS-1-1 disconnected (normal left inverted right x axis y axis) VGA-1-1 disconnected (normal left inverted right x axis y axis) DP-1-1 disconnected (normal left inverted right x axis y axis) DP-1-2 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm 1920x1200 59.95*+ 1600x1200 60.00
1680x1050 59.88
1280x1024 60.02
1280x960 60.00
1280x720 60.00
1024x768 60.00
800x600 60.32
640x480 60.00
720x400 70.08
DP-1-3 disconnected (normal left inverted right x axis y axis) 1680x1050 (0x49) 119.000MHz +HSync -VSync h: width 1680 start 1728 end 1760 total 1840 skew 0 clock 64.67KHz v: height 1050 start 1053 end 1059 total 1080 clock 59.88Hz 1280x1024 (0x4a) 108.000MHz +HSync +VSync h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz 1280x960 (0x4c) 108.000MHz +HSync +VSync h: width 1280 start 1376 end 1488 total 1800 skew 0 clock 60.00KHz v: height 960 start 961 end 964 total 1000 clock 60.00Hz 1024x768 (0x4e) 65.000MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz v: height 768 start 771 end 777 total 806 clock 60.00Hz 800x600 (0x4f) 40.000MHz +HSync +VSync h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz v: height 600 start 601 end 605 total 628 clock 60.32Hz

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