Comment 0 for bug 1167301

I have a Lenovo Thinkpad Twist with Core i7 processor and on-chip HD4000 GPU. It has an internal 1366x768 (16:9) display and I have connected and external 1920x1080 (16:9) monitor via HDMI. By default the display gets mirrored with only 1024x768 (4:3) because this is the highest common resolution of the two reported by xrandr. I can switch to a large desktop formed by the two screens with the System Settings (section "Display") with each screen using its native resolution.

I can mirror with a higher resolution running the commands:

xrandr --addmode HDMI1 1366x768
xrandr --output HDMI1 --mode 1366x768
xrandr --output HDMI1 --mode 1366x768 --same-as LVDS1

This is rather awkward when using a projector.

The problem also persists when connecting the external screen to the Mini DisplayPort (with adapter) instead of to the HDMI.

The output of "xrandr --prop" with both screens connected in large-desktop-over-both-screens mode (no mirroring):

Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 32767 x 32767
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 277mm x 156mm
 EDID:
  00ffffffffffff0030e47a0300000000
  00160103801c10780adce5975a559227
  1d505400000001010101010101010101
  010101010101241d56d4500016303020
  2500159c1000001b0000000000000000
  00000000000000000000000000fe004c
  4720446973706c61790a2020000000fe
  004c503132355748322d534c54310025
 BACKLIGHT: 1054 (0x0000041e) range: (0,1054)
 Backlight: 1054 (0x0000041e) range: (0,1054)
 scaling mode: Full aspect
  supported: None Full Center Full aspect
   1366x768 59.8*+
   1360x768 59.8 60.0
   1024x768 60.0
   800x600 60.3 56.2
   640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+1366+0 (normal left inverted right x axis y axis) 510mm x 287mm
 EDID:
  00ffffffffffff0015c3692001010101
  2d14010380331d78eaee95a3544c9926
  0f5054a1080081808140b30081c00101
  010101010101023a801871382d40582c
  4500fe1f1100001e000000ff00353732
  32393131300a20202020000000fc0045
  5632333333570a2020202020000000fd
  003b3d1f440f000a2020202020200153
  02031b41468102031112042309070783
  01000067030c001300881e8c0ad08a20
  e02d10103e96000403000000188c0ad0
  8a20e02d10103e96001009000000188c
  0ad090204031200c4055000403000000
  188c0ad090204031200c405500100900
  000018011d007251d01e206e28550010
  090000001e000000000000000000005c
 Broadcast RGB: Automatic
  supported: Automatic Full Limited 16:2
 audio: auto
  supported: force-dvi off auto on
   1920x1080 60.0*+
   1680x1050 59.9
   1280x1024 60.0
   1280x960 60.0
   1280x720 60.0
   1024x768 60.0
   800x600 60.3
   720x576 50.0
   720x480 59.9
   640x480 60.0 59.9
   720x400 70.1
DP1 disconnected (normal left inverted right x axis y axis)
 Broadcast RGB: Automatic
  supported: Automatic Full Limited 16:2
 audio: auto
  supported: force-dvi off auto on
HDMI2 disconnected (normal left inverted right x axis y axis)
 Broadcast RGB: Automatic
  supported: Automatic Full Limited 16:2
 audio: auto
  supported: force-dvi off auto on
DP2 disconnected (normal left inverted right x axis y axis)
 Broadcast RGB: Automatic
  supported: Automatic Full Limited 16:2
 audio: auto
  supported: force-dvi off auto on