apport information ** Attachment added: "RfKill.txt" https://bugs.launchpad.net/bugs/1813924/+attachment/5234286/+files/RfKill.txt
-- 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/1813924 Title: System freezes when undocking or changing to external screen while docked Status in linux package in Ubuntu: Confirmed Bug description: With the recent kernel update yesterday (4.15.0-42), I am encountering complete system freezes related to the Lenovo docking station: 1) When I boot while docked, I get stuck at black screen late in boot sequence (after typing in disk decryption passphrase) 2) If I dock after boot, and undock the system freezes 3) If I dock after boot, and switch to external screen only (Win+P) the system freezes I am running Ubuntu 18.04 LTS on a Lenovo T460s and I have previously been experiencing the bug reported below on Ubuntu 16.04, which was fixed after reinstalling with Ubuntu 18.04 (and to later kernel versions as described in the issue thread). https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1614513 It might be likely that this bug was reintroduced in kernel 4.15.0-42. I have attached kernel log relevant to the system freeze in 3) above. This is a work computer and I apologies if I cannot be helpful with testing out various kernels for you, but maybe someone else in the community is experiencing similar issues that is able to test kernel patches to fix this issue. Best regards Christian --- ProblemType: Bug ApportVersion: 2.20.9-0ubuntu7.5 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: csh 1632 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=c372b441-6feb-4136-b845-cc68ad64dff2 InstallationDate: Installed on 2018-11-12 (78 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: LENOVO 20F9003VMD Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-44-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-44.47-generic 4.15.18 RelatedPackageVersions: linux-restricted-modules-4.15.0-44-generic N/A linux-backports-modules-4.15.0-44-generic N/A linux-firmware 1.173.2 Tags: bionic Uname: Linux 4.15.0-44-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip libvirt lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 12/30/2015 dmi.bios.vendor: LENOVO dmi.bios.version: N1CET36W (1.04 ) dmi.board.asset.tag: Not Available dmi.board.name: 20F9003VMD dmi.board.vendor: LENOVO dmi.board.version: SDK0J40705 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1CET36W(1.04):bd12/30/2015:svnLENOVO:pn20F9003VMD:pvrThinkPadT460s:rvnLENOVO:rn20F9003VMD:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T460s dmi.product.name: 20F9003VMD dmi.product.version: ThinkPad T460s dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1813924/+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
