Ah, the displaylink stuff is perhaps a red herring. Some of our office configurations use that so I have the drivers installed to work with it, however it's not in use in this case. Note that the monitor detection also fails when plugged directly into the laptop's HDMI port.
These are the connected devices in a working configuration, via the USB-C dongle: $ grep connect /sys/class/drm/*/status /sys/class/drm/card0-DP-1/status:connected /sys/class/drm/card0-DP-2/status:disconnected /sys/class/drm/card0-eDP-1/status:connected /sys/class/drm/card0-HDMI-A-1/status:disconnected /sys/class/drm/card0-HDMI-A-2/status:disconnected /sys/class/drm/card0-HDMI-A-3/status:disconnected /sys/class/drm/card1-DVI-I-1/status:disconnected /sys/class/drm/card2-DVI-I-2/status:disconnected /sys/class/drm/card3-DVI-I-3/status:disconnected /sys/class/drm/card4-DVI-I-4/status:disconnected via the HDMI port directly: $ grep connect /sys/class/drm/*/status /sys/class/drm/card0-DP-1/status:disconnected /sys/class/drm/card0-DP-2/status:disconnected /sys/class/drm/card0-eDP-1/status:connected /sys/class/drm/card0-HDMI-A-1/status:connected /sys/class/drm/card0-HDMI-A-2/status:disconnected /sys/class/drm/card0-HDMI-A-3/status:disconnected /sys/class/drm/card1-DVI-I-1/status:disconnected /sys/class/drm/card2-DVI-I-2/status:disconnected /sys/class/drm/card3-DVI-I-3/status:disconnected /sys/class/drm/card4-DVI-I-4/status:disconnected and I'll reboot into the newer kernel to collect that also. -- 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/1993532 Title: Unable to see second monitor Status in linux package in Ubuntu: Incomplete Bug description: I have a second monitor plugged into this laptop. Under 5.15.0-52-generic this monitor isn't seen by Ubuntu, whether via a thunderbolt dongle or directly into the HDMI port. When I boot it back into 5.15.0-50-generic it works just fine. ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-5.15.0-52-generic 5.15.0-52.58 ProcVersionSignature: Ubuntu 5.15.0-50.56-generic 5.15.60 Uname: Linux 5.15.0-50-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: robin 4304 F.... pulseaudio /dev/snd/controlC0: robin 4304 F.... pulseaudio CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Wed Oct 19 14:53:25 2022 InstallationDate: Installed on 2022-03-17 (216 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20220313) MachineType: Dell Inc. Latitude 7320 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.15.0-50-generic root=/dev/mapper/vgubuntu-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.15.0-50-generic N/A linux-backports-modules-5.15.0-50-generic N/A linux-firmware 20220329.git681281e4-0ubuntu3.5 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/15/2022 dmi.bios.release: 1.17 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.17.2 dmi.board.name: 07MHG4 dmi.board.vendor: Dell Inc. dmi.board.version: A02 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.17.2:bd06/15/2022:br1.17:svnDellInc.:pnLatitude7320:pvr:rvnDellInc.:rn07MHG4:rvrA02:cvnDellInc.:ct10:cvr:sku0A34: dmi.product.family: Latitude dmi.product.name: Latitude 7320 dmi.product.sku: 0A34 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1993532/+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
