Thanks for those details, it's good to finally see some documentation on what supports MST and what doesn't!
I update the description to reflect the fact that you need 4th gen hardware to get DP 1.2 on Intel. ** Summary changed: - DisplayPort 1.2 MST support seems to be broken in the Intel driver + DisplayPort 1.2 MST support is missing in the Intel driver ** Description changed: I have two recent DisplayPort monitors, both supporting the 1.2 version of the standard and one containing an MST hub (DELL 2913WM). - I have my laptop (Lenovo ThinkPad X230, HD4000 Ivy Bridge) connected - over mini-displayport to the display containing the hub, then the second - display is plugged in that one over DisplayPort. + I have an Intel Haswell based NUC connected over mini-displayport to the + display containing the hub, then the second display is plugged in that + one over DisplayPort. DisplayPort 1.2 is enabled on the display containing the hub and the second display lights up fine but just works as a clone of the first display, without ever showing up in xrandr, dmesg or any other useful logs I could find. My understanding of MST is that the second display should show up as DP2 on my laptop so I can configure it as I would any other display. - ProblemType: Bug - DistroRelease: Ubuntu 13.04 - Package: xorg 1:7.7+1ubuntu4 - ProcVersionSignature: Ubuntu 3.8.0-1.5-generic 3.8.0-rc4 - Uname: Linux 3.8.0-1-generic x86_64 - .tmp.unity.support.test.0: - - ApportVersion: 2.8-0ubuntu2 - Architecture: amd64 - CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3 - CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f - CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell] - CompositorRunning: compiz - Date: Thu Jan 24 12:13:30 2013 - DistUpgraded: Fresh install - DistroCodename: raring - DistroVariant: ubuntu - ExtraDebuggingInterest: Yes, including running git bisection searches - GraphicsCard: - Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller]) - Subsystem: Lenovo Device [17aa:21fa] - InstallationDate: Installed on 2012-09-02 (143 days ago) - InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902) - MachineType: LENOVO 2306CTO - MarkForUpload: True - ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-1-generic root=UUID=f72ebb89-0931-4549-ab8f-10e9022e243b ro quiet splash "acpi_osi=!Windows 2012" vt.handoff=7 - SourcePackage: xorg - UpgradeStatus: No upgrade log present (probably fresh install) - XorgConf: - Section "Device" - Identifier "Card0" - Driver "intel" - Option "AccelMethod" "sna" - EndSection - dmi.bios.date: 09/11/2012 - dmi.bios.vendor: LENOVO - dmi.bios.version: G2ET82WW (2.02 ) - dmi.board.asset.tag: Not Available - dmi.board.name: 2306CTO - dmi.board.vendor: LENOVO - dmi.board.version: Not Defined - dmi.chassis.asset.tag: No Asset Information - dmi.chassis.type: 10 - dmi.chassis.vendor: LENOVO - dmi.chassis.version: Not Available - dmi.modalias: dmi:bvnLENOVO:bvrG2ET82WW(2.02):bd09/11/2012:svnLENOVO:pn2306CTO:pvrThinkPadX230:rvnLENOVO:rn2306CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: - dmi.product.name: 2306CTO - dmi.product.version: ThinkPad X230 - dmi.sys.vendor: LENOVO - version.compiz: compiz 1:0.9.9~daily13.01.21-0ubuntu1 - version.ia32-libs: ia32-libs N/A - version.libdrm2: libdrm2 2.4.41-0ubuntu1 - version.libgl1-mesa-dri: libgl1-mesa-dri 9.0.2-0ubuntu1 - version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A - version.libgl1-mesa-glx: libgl1-mesa-glx 9.0.2-0ubuntu1 - version.xserver-xorg-core: xserver-xorg-core 2:1.13.1.901-0ubuntu2 - version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2 - version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.0.0-0ubuntu1 - version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.19-0ubuntu2 - version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.6-0ubuntu1 - xserver.bootTime: Thu Jan 24 12:07:10 2013 - xserver.configfile: /etc/X11/xorg.conf - xserver.errors: - - xserver.logfile: /var/log/Xorg.0.log - xserver.version: 2:1.13.1.901-0ubuntu2 - xserver.video_driver: intel + UPDATE: Updated the bug report after it was pointed out that the + original test hardware, a Lenovo x230 isn't DP 1.2 capable. The same + test on hardware also fails, due to missing support for MST in the + driver. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1104230 Title: DisplayPort 1.2 MST support is missing in the Intel driver Status in “xserver-xorg-video-intel” package in Ubuntu: Confirmed Bug description: I have two recent DisplayPort monitors, both supporting the 1.2 version of the standard and one containing an MST hub (DELL 2913WM). I have an Intel Haswell based NUC connected over mini-displayport to the display containing the hub, then the second display is plugged in that one over DisplayPort. DisplayPort 1.2 is enabled on the display containing the hub and the second display lights up fine but just works as a clone of the first display, without ever showing up in xrandr, dmesg or any other useful logs I could find. My understanding of MST is that the second display should show up as DP2 on my laptop so I can configure it as I would any other display. UPDATE: Updated the bug report after it was pointed out that the original test hardware, a Lenovo x230 isn't DP 1.2 capable. The same test on hardware also fails, due to missing support for MST in the driver. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1104230/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
