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[Aleš Pospíchal <ales@xxxxxxxxxxxxxxxxxx>]

Has anyone tested if this bug is fixed in kernel 3.12 final released
today?

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https://bugs.launchpad.net/bugs/1167301

Title:
  8086:0166 [ThinkPad Twist S230u 3347] REGRESSION: Mirroring display
  works only with 1024x768 (4:3) whereas my laptop has 1366x768 (16:9) &
  external monitor 1920x1080 (16:9)

Status in “linux” package in Ubuntu:
  Confirmed
Status in “xorg-server” package in Ubuntu:
  Invalid

Bug description:
  I have a Lenovo Thinkpad Twist with 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.

  This is a kernel regression from 3.8.0-7-generic to 3.8.0-19.

  WORKAROUND: 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.

  I did not test with 12.10 by myself, but according to the comment from
  Gizmo Chicken below this worked correctly under 12.10, so this is a
  regression and not a feature request.

  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
  ---
  .tmp.unity.support.test.0:

  ApportVersion: 2.9.2-0ubuntu5
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  DistUpgraded: Fresh install
  DistroCodename: raring
  DistroRelease: Ubuntu 13.04
  DistroVariant: ubuntu
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:2205]
  InstallationDate: Installed on 2013-03-28 (12 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130328)
  MachineType: LENOVO 334729G
  MarkForUpload: True
  Package: xorg-server (not installed)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-17-generic root=UUID=7229d092-c8f9-4b8a-bae8-529fc6a0340f ro elevator=deadline quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.8.0-17.27-generic 3.8.6
  Tags:  raring ubuntu compiz-0.9
  Uname: Linux 3.8.0-17-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  dmi.bios.date: 02/05/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: GDET92WW (1.52 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 334729G
  dmi.board.vendor: LENOVO
  dmi.board.version: Win8 Pro DPK TPG
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrGDET92WW(1.52):bd02/05/2013:svnLENOVO:pn334729G:pvrThinkPadTwist:rvnLENOVO:rn334729G:rvrWin8ProDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 334729G
  dmi.product.version: ThinkPad Twist
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.9~daily13.04.05-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.43-0ubuntu1
  version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.3-0ubuntu1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.3-0ubuntu1
  version.xserver-xorg-core: xserver-xorg-core 2:1.13.3-0ubuntu5
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2b2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.1.0-0ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.21.5-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.7-0ubuntu1
  xserver.bootTime: Wed Apr 10 12:05:38 2013
  xserver.configfile: default
  xserver.errors:

  xserver.logfile: /var/log/Xorg.0.log
  xserver.version: 2:1.13.3-0ubuntu5
  xserver.video_driver: intel

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