I noticed that the notebook is working via HDMI with some other monitor today. Not sure why.
I'm going to verify this finding with another monitor at home, and if that results positive I will close this bug report again. (Sorry!) -- 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/1763202 Title: Lenovo X1 Carbon 6th Gen. HDMI not working for external monitor Status in linux package in Ubuntu: Confirmed Bug description: I have an X1 Carbon 6th Gen. (Intel Core i7 8th Gen, 16 GB RAM, 512 GB SSD). When I try to attach an external monitor via an HDMI cable the monitor receives no signal. Similarly, when I use the Thunderbold dock and attach two monitors (one via HDMI, one with DisplayPort) only the monitor attached with DisplayPort works; the monitor attached with HDMI stays black. This made me think if this is really a bug in the software. I saw people describing this issue with Windows installed; the solution was to hit a special key combination. Unfortunately, the multimedia keys all not all functional, specifically the F7 key, which seems to meant for "activate external monitor", has no function. --- ApportVersion: 2.20.9-0ubuntu4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: peter 3510 F.... pulseaudio /dev/snd/controlC0: peter 3510 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 HibernationDevice: RESUME=UUID=8aee1825-7879-4889-8de3-e57900548385 InstallationDate: Installed on 2018-04-06 (5 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180403) MachineType: LENOVO 20KHCTO1WW Package: linux (not installed) ProcFB: 0 EFI VGA 1 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-13-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-13.14-generic 4.15.10 RelatedPackageVersions: linux-restricted-modules-4.15.0-13-generic N/A linux-backports-modules-4.15.0-13-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-13-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip docker lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 02/27/2018 dmi.bios.vendor: LENOVO dmi.bios.version: N23ET37W (1.12 ) dmi.board.asset.tag: Not Available dmi.board.name: 20KHCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN23ET37W(1.12):bd02/27/2018:svnLENOVO:pn20KHCTO1WW:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KHCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 6th dmi.product.name: 20KHCTO1WW dmi.product.version: ThinkPad X1 Carbon 6th dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1763202/+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
