Thanks for identifying the culprit, Til. Since the problem still exists from 3.8.8 all the way through to current mainline (3.11), I think the best course of action is for you to file a bug against DRM on bugzilla.kernel.org, so that upstream can sort out how they want to address it. We'll mirror whatever method upstream prefers to address it (fix, revert, override switch, etc.) in 3.8-stable and Raring.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1167301/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
