** Attachment added: "Logs while the screens are blank" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1873510/+attachment/5356278/+files/nvidia-bug-report-blank.log.gz
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1873510 Title: Blank screen when hotplugging monitors connected through DisplayPort dock Status in xorg package in Ubuntu: New Bug description: Hi, I run Ubuntu 18.04 on a Dell Precision 7540. Most of the time I use this through a Dell WD19DC dock. The dock is connected to a Trendnet TK-240DP KVM Switch. If I have the laptop clamshell closed, like I normally do, and switch my KVM to the other computer, and then switch back, my monitors stay enter power saving mode. Most of the time, I am able to recover the screens by pressing Control-Alt-F3, waiting a few seconds, and then pressing Control-Alt-F2. The problem does not happen if the clamshell is left open. Part of the problem is that this is a cheaper KVM, and from the laptop's perspective the screens are disconnected when the computer is switched. Changing a few small things makes the problem not occur: * Opening the clamshell when switching the KVM. Interestingly, if the clamshell is open during either the switch away OR the switch back, the screen recovers. * Manually removing the displays one at a time does not reliably trigger the problem. Though I have witnessed the problem occur once or twice when removing a single display. I am attaching three nvidia bug report logs: 1. nvidia-bug-report-before.log.gz is after a clean boot when I have not used the KVM. 2. nvidia-bug-report-blank.log.gz is after switching the KVM to the other computer and back. During this time, both screens are black. The log was taken over ssh. 3. nvidia-bug-report-workaround.log.gz is after I have recovered the screen after using Ctrl-Alt-F3 followed by Ctrl-Alt-F2. This problem happens when prime-select is set to intel or nvidia. These logs are when it was set to intel. Any advice would be greatly appreciated. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: xorg 1:7.7+19ubuntu7.1 Uname: Linux 5.5.0-050500rc6-generic x86_64 .tmp.unity_support_test.0: ApportVersion: 2.20.9-0ubuntu7.14 Architecture: amd64 BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log' CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins' CompositorRunning: None CurrentDesktop: Unity:Unity7:ubuntu Date: Fri Apr 17 13:57:43 2020 DistUpgraded: Fresh install DistroCodename: bionic DistroVariant: ubuntu DkmsStatus: nvidia, 440.82, 4.15.0-1079-oem, x86_64: installed nvidia, 440.82, 5.0.0-1047-oem-osp1, x86_64: installed nvidia, 440.82, 5.5.0-050500rc6-generic, x86_64: installed ExtraDebuggingInterest: Yes, including running git bisection searches GraphicsCard: Intel Corporation Device [8086:3e9b] (rev 02) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:0926] NVIDIA Corporation Device [10de:1f36] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Dell Device [1028:0926] InstallationDate: Installed on 2020-01-03 (104 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) MachineType: Dell Inc. Precision 7540 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.5.0-050500rc6-generic root=UUID=7f01cb01-e7df-4259-9d7a-ae37a19f363b ro quiet splash dis_ucode_ldr vt.handoff=1 SourcePackage: xorg Symptom: display Title: Xorg freeze UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/12/2020 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.8.2 dmi.board.name: 0499T7 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.8.2:bd03/12/2020:svnDellInc.:pnPrecision7540:pvr:rvnDellInc.:rn0499T7:rvrA00:cvnDellInc.:ct10:cvr: dmi.product.family: Precision dmi.product.name: Precision 7540 dmi.product.sku: 0926 dmi.sys.vendor: Dell Inc. version.compiz: compiz 1:0.9.13.1+18.04.20180302-0ubuntu1 version.libdrm2: libdrm2 2.4.99-1ubuntu1~18.04.2 version.libgl1-mesa-dri: libgl1-mesa-dri 19.2.8-0ubuntu0~18.04.3 version.libgl1-mesa-glx: libgl1-mesa-glx 19.2.8-0ubuntu0~18.04.3 version.xserver-xorg-core: xserver-xorg-core N/A version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1873510/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
