Public bug reported: Present testing has focused on closing the laptop lid and reopening it. The laptop suspends as expected and resumes as expected (existing ssh sessions start working again) except that the display remains black and calls such as `xset -display :0 dpms force on` hang. The screen remains blank sSometimes for a few minutes, sometimes for many. In the example log it was 10 minutes and a few seconds before the display turned back on. One time trying to capture a log of the recovery I gave up after 70 minutes. While the display is black `/var/log/Xorg.0.log` repeats the following lines once per second.
[ 119.384] (WW) modeset(0): hotplug event: connector 86's link-state is BAD, tried resetting the current mode. You may be leftwith a black screen if this fails... [ 119.386] (II) modeset(0): EDID vendor "SDC", prod id 16705 [ 119.386] (II) modeset(0): Printing DDC gathered Modelines: [ 119.386] (II) modeset(0): Modeline "3840x2160"x0.0 545.12 3840 3888 3920 4160 2160 2164 2168 2184 +hsync -vsync (131.0 kHz eP) This stops when the display turns on and no other messages are logged. The journalctl log has a much longer repeated sequence of messages. I haven't confirmed exact matching of the whole repeated block but here's a snippet reporting a failure. Nov 27 00:02:32 p1 kernel: [drm:intel_dp_link_training_clock_recovery [i915]] Using LINK_RATE_SET value 02 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using signal levels 00000000 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 0 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_program_link_training_pattern [i915]] Using DP training pattern TPS1 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using signal levels 04000000 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 1 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using signal levels 07000000 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0 Nov 27 00:02:32 p1 kernel: [drm:intel_dp_link_training_clock_recovery [i915]] Max Voltage Swing reached Nov 27 00:02:32 p1 kernel: [drm:intel_dp_start_link_train [i915]] [CONNECTOR:86:eDP-1] Link Training failed at link rate = 540000, lane count = 4 When the display turned back on I instead get the following success message. Nov 27 00:07:22 p1 kernel: [drm:intel_dp_link_training_clock_recovery [i915]] Using LINK_RATE_SET value 02 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using signal levels 00000000 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 0 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_program_link_training_pattern [i915]] Using DP training pattern TPS1 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using signal levels 04000000 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 1 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using signal levels 07000000 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using vswing level 2 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_set_signal_levels [i915]] Using pre-emphasis level 0 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_link_training_clock_recovery [i915]] clock recovery OK Nov 27 00:07:22 p1 kernel: [drm:intel_dp_program_link_training_pattern [i915]] Using DP training pattern TPS3 Nov 27 00:07:22 p1 kernel: [drm:intel_dp_start_link_train [i915]] Channel EQ done. DP Training successful I tested the mainline .deb package for 5.3.13 and it did not exhibit this issue. When I open the laptop lid after suspending by closing it the cursor reliably displays within about 1 second and the lock screen is shown within about another second. I further checked versions and the last mainline .deb to exhibit the issue is 5.3.11. 5.3.12 works well. Looking at the changelog for 5.3.12 showed the following two commits referencing i915 (don't let me mislead you here of course, just trying to provide as much info as possible). The first one strikes me as relevant but I haven't applied that patch to the Ubuntu 5.3.0-23 kernel and built it for testing. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2f216a8507153578efc309c821528a6b81628cd2 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ed77d88752aea56b33731aee42e7146379b90769 ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: linux-image-5.3.0-23-generic 5.3.0-23.25 ProcVersionSignature: Ubuntu 5.3.0-23.25-generic 5.3.7 Uname: Linux 5.3.0-23-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu8.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: altendky 1461 F.... pulseaudio CurrentDesktop: KDE Date: Wed Nov 27 10:44:46 2019 InstallationDate: Installed on 2019-11-26 (0 days ago) InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017) MachineType: LENOVO 20QTCTO1WW ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-23-generic root=/dev/mapper/lvm_group-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.3.0-23-generic N/A linux-backports-modules-5.3.0-23-generic N/A linux-firmware 1.183.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/17/2019 dmi.bios.vendor: LENOVO dmi.bios.version: N2OET40W (1.27 ) dmi.board.asset.tag: Not Available dmi.board.name: 20QTCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0T08861 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN2OET40W(1.27):bd10/17/2019:svnLENOVO:pn20QTCTO1WW:pvrThinkPadP1Gen2:rvnLENOVO:rn20QTCTO1WW:rvrSDK0T08861WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad P1 Gen 2 dmi.product.name: 20QTCTO1WW dmi.product.sku: LENOVO_MT_20QT_BU_Think_FM_ThinkPad P1 Gen 2 dmi.product.version: ThinkPad P1 Gen 2 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug eoan ** Attachment added: "journalctl-2019-11-26T23_56_10-05_00.log" https://bugs.launchpad.net/bugs/1854177/+attachment/5308147/+files/journalctl-2019-11-26T23_56_10-05_00.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1854177 Title: Black screen after resume from suspend on Lenovo ThinkPad P1 Gen 2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1854177/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
