Running "sudo xdiagnose" provided useful results, showing that the retrievel of EDID information fails:
[26303.206855] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26303.528370] usb 3-3.1: new SuperSpeed USB device number 6 using xhci_hcd [26303.756236] usb 2-3.1: new high-speed USB device number 17 using xhci_hcd [26303.776483] usb 3-3.1: New USB device found, idVendor=2109, idProduct=0812 [26303.776486] usb 3-3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [26303.776488] usb 3-3.1: Product: OneLink Pro Dock [26303.776489] usb 3-3.1: Manufacturer: LENOVO [26303.778523] hub 3-3.1:1.0: USB hub found [26303.778650] hub 3-3.1:1.0: 4 ports detected [26303.822991] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26303.857614] usb 2-3.1: New USB device found, idVendor=2109, idProduct=2812 [26303.857617] usb 2-3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [26303.857619] usb 2-3.1: Product: OneLink Pro Dock [26303.857620] usb 2-3.1: Manufacturer: LENOVO [26303.858249] hub 2-3.1:1.0: USB hub found [26303.858390] hub 2-3.1:1.0: 4 ports detected [26304.148234] usb 2-3.1.1: new full-speed USB device number 18 using xhci_hcd [26304.148261] usb 3-3.1.3: new SuperSpeed USB device number 7 using xhci_hcd [26304.164799] usb 3-3.1.3: New USB device found, idVendor=17ef, idProduct=304f [26304.164806] usb 3-3.1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [26304.164808] usb 3-3.1.3: Product: ThinkPad Dock Giga [26304.164809] usb 3-3.1.3: Manufacturer: Lenovo [26304.164811] usb 3-3.1.3: SerialNumber: 0050B67951C2 [26304.167588] cdc_ether 3-3.1.3:2.0 eth1: register 'cdc_ether' at usb-0000:00:14.0-3.1.3, CDC Ethernet Device, 00:50:b6:79:51:c2 [26304.169545] cdc_ether 3-3.1.3:2.0 eth1: unregister 'cdc_ether' usb-0000:00:14.0-3.1.3, CDC Ethernet Device [26304.255321] usb 2-3.1.1: New USB device found, idVendor=0711, idProduct=0230 [26304.255324] usb 2-3.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [26304.255326] usb 2-3.1.1: Product: USB Ver1.2 Device [26304.255327] usb 2-3.1.1: Manufacturer: USB-RS232 Interface Converter [26304.255329] usb 2-3.1.1: SerialNumber: 015109 [26304.257332] mct_u232 2-3.1.1:1.0: MCT U232 converter detected [26304.257544] usb 2-3.1.1: MCT U232 converter now attached to ttyUSB0 [26304.296535] usb 3-3.1.3: reset SuperSpeed USB device number 7 using xhci_hcd [26304.340692] usb 2-3.1.2: new high-speed USB device number 19 using xhci_hcd [26304.341183] r8152 3-3.1.3:1.0 eth1: v1.08.2 [26304.439934] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26304.440407] usb 2-3.1.2: New USB device found, idVendor=05ac, idProduct=911c [26304.440409] usb 2-3.1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [26304.442065] hub 2-3.1.2:1.0: USB hub found [26304.442124] hub 2-3.1.2:1.0: 3 ports detected [26304.712204] usb 2-3.1.2.2: new full-speed USB device number 20 using xhci_hcd [26305.059084] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26305.502533] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready [26305.556248] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready [26305.675478] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26306.060130] usb 2-3.1.4: new full-speed USB device number 21 using xhci_hcd [26306.165899] usb 2-3.1.4: config 1 interface 1 altsetting 1 has 2 endpoint descriptors, different from the interface descriptor's value: 1 [26306.168414] usb 2-3.1.4: New USB device found, idVendor=17ef, idProduct=304e [26306.168417] usb 2-3.1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [26306.168419] usb 2-3.1.4: Product: ThinkPad OneLink Pro Dock Audio [26306.168421] usb 2-3.1.4: Manufacturer: C-Media Electronics Inc. [26306.187250] input: C-Media Electronics Inc. ThinkPad OneLink Pro Dock Audio as /devices/pci0000:00/0000:00:14.0/usb2/2-3/2-3.1/2-3.1.4/2-3.1.4:1.3/0003:17EF:304E.0007/input/input20 [26306.187570] hid-generic 0003:17EF:304E.0007: input,hidraw0: USB HID v1.00 Device [C-Media Electronics Inc. ThinkPad OneLink Pro Dock Audio] on usb-0000:00:14.0-3.1.4/input3 [26306.290685] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26306.906238] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26306.906466] [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* failed to train DP, aborting [26306.916308] [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* Timed out waiting for DP idle patterns [26307.517170] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26308.133160] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26308.750067] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26309.365515] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26309.981216] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26310.569855] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready [26310.609166] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26311.230512] [drm:intel_dp_link_training_clock_recovery [i915]] *ERROR* too many voltage retries, give up [26311.230744] [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* failed to train DP, aborting [26311.241886] [drm:intel_dp_link_training_channel_equalization [i915]] *ERROR* Timed out waiting for DP idle patterns [26314.831488] usb 2-3.1.2.2: New USB device found, idVendor=05ac, idProduct=921c [26314.831491] usb 2-3.1.2.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [26314.831504] usb 2-3.1.2.2: Product: Apple Cinema HD Display [26314.831506] usb 2-3.1.2.2: Manufacturer: Apple Computer, Inc. [26314.837511] hid-generic 0003:05AC:921C.0008: hiddev0,hidraw1: USB HID v1.11 Device [Apple Computer, Inc. Apple Cinema HD Display] on usb-0000:00:14.0-3.1.2.2/input0 [26315.267422] lenovo 0005:17EF:6048.0009: unknown main item tag 0x0 [26315.267665] input: ThinkPad Compact Bluetooth Keyboard with TrackPoint as /devices/pci0000:00/0000:00:14.0/usb2/2-7/2-7:1.0/bluetooth/hci0/hci0:256/0005:17EF:6048.0009/input/input21 [26315.268411] lenovo 0005:17EF:6048.0009: input,hidraw2: BLUETOOTH HID v3.09 Keyboard [ThinkPad Compact Bluetooth Keyboard with TrackPoint] on 60:57:18:0c:4a:67 [26316.523716] hid-generic 0005:0A5C:0001.000A: unknown main item tag 0x0 [26316.523778] input: Kensington SureTrack Mouse as /devices/pci0000:00/0000:00:14.0/usb2/2-7/2-7:1.0/bluetooth/hci0/hci0:512/0005:0A5C:0001.000A/input/input22 [26316.524025] hid-generic 0005:0A5C:0001.000A: input,hidraw3: BLUETOOTH HID v1.29 Mouse [Kensington SureTrack Mouse] on 60:57:18:0c:4a:67 [26330.908156] [drm:drm_edid_block_valid [drm]] *ERROR* EDID checksum is invalid, remainder is 40 [26330.908159] Raw EDID: [26330.908160] 00 ff ff ff ff ff ff 00 4c 2d 3f 04 34 32 59 4d [26330.908161] 02 13 01 03 80 34 20 78 2a ee 91 a3 54 4c 99 26 [26330.908162] 0f 50 54 ff ff ff ff ff ff ff ff ff ff ff ff ff [26330.908163] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [26330.908164] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [26330.908165] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [26330.908166] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [26330.908167] ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1565667 Title: When returning from suspend, my external Apple monitor is not detected, and nothing I do seem to enable it. Rebooting makes everything work as it should. This was not a problem on 15.10. Status in xorg package in Ubuntu: New Bug description: After rebooting, xrandr --prop gives me: DP2-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 495mm x 310mm EDID: 00ffffffffffff0006101c928cb90102 1112010380311f782efd45a3574a9e25 135054000000d1000101010101010101 010101010101283c80a070b023403020 3600ef361100001a000000ff00324138 3137313755584d4e0a20000000fc0043 696e656d612048440a20202000000000 00000000000000000000000000000155 400102000000007e2401a500ffff031a 1aa80100000000004000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000000 00000000000000000000000000000057 Broadcast RGB: Automatic supported: Automatic, Full, Limited 16:235 audio: auto supported: force-dvi, off, auto, on 1920x1200 59.95*+ After suspend, it is simply listed as disconnected, trying various xrandr commands doesn't make me able to connect it, adding a mode and trying with "xrandr --output DP2-1 --mode 1920x1200" just gives me xrandr: Configure crtc 1 failed ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: xorg 1:7.7+13ubuntu3 ProcVersionSignature: Ubuntu 4.4.0-16.32-generic 4.4.6 Uname: Linux 4.4.0-16-generic x86_64 .tmp.unity.support.test.0: ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 BootLog: CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: compiz CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0' CompositorUnredirectFSW: true CurrentDesktop: Unity Date: Mon Apr 4 10:38:11 2016 DistUpgraded: 2016-03-23 14:48:41,527 DEBUG enabling apt cron job DistroCodename: xenial DistroVariant: ubuntu DkmsStatus: acpi-call, 1.1.0, 3.19.0-32-generic, x86_64: installed acpi-call, 1.1.0, 4.2.0-32-generic, x86_64: installed acpi-call, 1.1.0, 4.2.0-35-generic, x86_64: installed acpi-call, 1.1.0, 4.4.0-15-generic, x86_64: installed acpi-call, 1.1.0, 4.4.0-16-generic, x86_64: installed ExtraDebuggingInterest: Yes GraphicsCard: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller]) Subsystem: Lenovo Broadwell-U Integrated Graphics [17aa:2227] InstallationDate: Installed on 2015-03-02 (398 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150302) MachineType: LENOVO 20BS006BMD ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-16-generic root=UUID=9b319f2a-5004-42c0-8e66-6eca970f9885 ro quiet splash vt.handoff=7 SourcePackage: xorg Symptom: display UpgradeStatus: Upgraded to xenial on 2016-03-23 (11 days ago) dmi.bios.date: 12/01/2014 dmi.bios.vendor: LENOVO dmi.bios.version: N14ET25W (1.03 ) dmi.board.asset.tag: Not Available dmi.board.name: 20BS006BMD dmi.board.vendor: LENOVO dmi.board.version: SDK0E50510 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN14ET25W(1.03):bd12/01/2014:svnLENOVO:pn20BS006BMD:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BS006BMD:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone: dmi.product.name: 20BS006BMD dmi.product.version: ThinkPad X1 Carbon 3rd dmi.sys.vendor: LENOVO version.compiz: compiz 1:0.9.12.2+16.04.20160318-0ubuntu1 version.ia32-libs: ia32-libs N/A version.libdrm2: libdrm2 2.4.67-1 version.libgl1-mesa-dri: libgl1-mesa-dri 11.1.2-1ubuntu2 version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A version.libgl1-mesa-glx: libgl1-mesa-glx 11.1.2-1ubuntu2 version.xserver-xorg-core: xserver-xorg-core 2:1.18.1-1ubuntu4 version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2 version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.6.1-1ubuntu2 version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20160218-1ubuntu3 version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2 xserver.bootTime: Mon Apr 4 10:22:19 2016 xserver.configfile: default xserver.errors: xserver.logfile: /var/log/Xorg.0.log xserver.outputs: product id 1049 vendor LGD xserver.version: 2:1.18.1-1ubuntu4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1565667/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
