I tried Agner's train delay patch (https://bugs.freedesktop.org/attachment.cgi?id=92883) with the recent linux-3.13.2 and had partial success with a HDMI connection. My rig includes T440s with a ThinkPad Ultra Dock. As noted by others, the display is not instantly turned on; it takes about ~30 seconds to light up. I say partial success because the display now has patterns with green dots all over. See the attached picture I took with my camera (https://bugs.freedesktop.org/attachment.cgi?id=93654). I green overlay is also present with Pichler's patch (https://bugs.freedesktop.org/attachment.cgi?id=91164), but I only observed it once.
I observed the following in dmesg: root@iris:/home/totakura# dmesg | grep drm [ 17.327337] [drm] Initialized drm 1.1.0 20060810 [ 17.566302] [drm] Memory usable by graphics device = 2048M [ 17.607126] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 17.607128] [drm] Driver supports precise vblank timestamp query. [ 17.746991] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5 [ 17.764706] fbcon: inteldrmfb (fb0) is primary device [ 18.782531] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off [ 19.354891] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 19.363836] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 [ 466.978775] [drm:intel_dp_complete_link_train] *ERROR* failed to train DP, aborting [ 1216.132474] [drm] stuck on render ring [ 1216.132490] [drm] GPU crash dump saved to /sys/class/drm/card0/error [ 1216.132493] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. [ 1216.132495] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [ 1216.132497] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue. [ 1216.132500] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. I could not get the GPU crash dump which is show in the dmesg as I rebooted immediately. Sorry :( Next, I combined Agner's (92882) and Pichler's(91164) patches into one (https://bugs.freedesktop.org/attachment.cgi?id=93653). With this patch, I was able to boot up while docked. The transition from GRUB to FB took a while but after that the external display is identical to that on the notebook display. Consequently, I was able to suspend/shutdown while docked. While waking up from suspend there is also a delay during which the system freezes, but its short. With this patch I do not see the DRM warning in dmesg anymore. This is the output now: totakura@iris:~$ dmesg | grep drm [ 19.758646] [drm] Initialized drm 1.1.0 20060810 [ 20.152088] [drm] Memory usable by graphics device = 2048M [ 20.192418] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 20.192419] [drm] Driver supports precise vblank timestamp query. [ 20.320274] [drm] GMBUS [i915 gmbus dpb] timed out, falling back to bit banging on pin 5 [ 20.426013] fbcon: inteldrmfb (fb0) is primary device [ 21.811554] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off [ 43.744150] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device [ 43.768082] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0 With the external display working over HDMI, I went on to connect another display to the VGA port on the dock. This display simply replicated the HDMI display. This should not be the case here as from the dock's manual, I should be able to drive three displays, of which one should be connected to the VGA port. I also observed that even though I connected to the HDMI port, the xrandr output still lists the external display under DP2 while showing HDMI2 as disconnected. I do not know if this is a bug or not. Here is the output: totakura@iris:~$ xrandr Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 32767 x 32767 eDP1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 309mm x 175mm 1920x1080 60.0*+ 59.9 1680x1050 60.0 59.9 1600x1024 60.2 1400x1050 60.0 1280x1024 60.0 1440x900 59.9 1280x960 60.0 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 DP1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.0*+ 50.0 59.9 1920x1080i 60.1 50.0 60.0 1680x1050 60.0 1280x1024 75.0 60.0 1440x900 59.9 1280x960 60.0 1280x800 59.8 1152x864 75.0 1280x720 60.0 50.0 59.9 1024x768 75.1 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 720x576 50.0 720x480 60.0 59.9 640x480 75.0 72.8 66.7 60.0 59.9 720x400 70.1 HDMI2 disconnected (normal left inverted right x axis y axis) VIRTUAL1 disconnected (normal left inverted right x axis y axis) With the other display connected to VGA, it is not listed by xrandr. Apart from these, sound via HDMI is working. Note that the sound output from the dock via 3.5mm pin is disable when HDMI is in use. -- 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/1275794 Title: Lenovo T440s freezes when connected to docking station Status in The Linux Kernel: Incomplete Status in “linux” package in Ubuntu: Triaged Bug description: This bug report looks to be for the same issue: https://bugs.freedesktop.org/show_bug.cgi?id=71267 I came across the above bug report here: https://bbs.archlinux.org/viewtopic.php?pid=1374408 I'm running with a Thinkpad T440s and ultra dock with hdmi<->hdmi. In my case if I dock when hdmi is connected to the dock, the mouse and keyboard freeze once connected. When I undock they unfreeze. If I dock when hdmi is not connected to the dock, the mouse and keyboard don't freeze. Ubuntu release: 14.04 Trusty Tahr (development branch) --- ApportVersion: 2.13.2-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: corey 2385 F.... pulseaudio /dev/snd/controlC0: corey 2385 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 14.04 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=12d1435c-d652-4aab-8da6-3b043f3da722 InstallationDate: Installed on 2014-01-31 (3 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140130) MachineType: LENOVO 20AQCTO1WW Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-5-generic.efi.signed root=UUID=d17999de-2672-48e5-b628-403d311d3251 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0 RelatedPackageVersions: linux-restricted-modules-3.13.0-5-generic N/A linux-backports-modules-3.13.0-5-generic N/A linux-firmware 1.123 Tags: trusty Uname: Linux 3.13.0-5-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip kvm libvirtd lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 12/10/2013 dmi.bios.vendor: LENOVO dmi.bios.version: GJET67WW (2.17 ) dmi.board.asset.tag: Not Available dmi.board.name: 20AQCTO1WW dmi.board.vendor: LENOVO dmi.board.version: 0B98405 STD dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGJET67WW(2.17):bd12/10/2013:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvr0B98405STD:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 20AQCTO1WW dmi.product.version: ThinkPad T440s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1275794/+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
