Annoyingly, I have to report that this morning the display in question worked fine with both the latest stable hirsuit kernel (5.11.0-17-generic) and the version I reported the bug for (5.11.0-16-generic).
If I can find a way to reproduce it reliably, then I'll re-open this bug, but for the moment, maybe close as non-reproducible? -- 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/1925675 Title: hirsuit kernel fails to detect monitor plugged into USBC thunderbolt socket Status in linux package in Ubuntu: Confirmed Bug description: On upgrade to hirsuit hippo, my Dell 9360 no longer detects a monitor plugged into the thunderbolt usbc socket. If I reboot with the latest kernel from Ubuntu 20.10 (version 5.8.0-50) it works perfectly, detecting the monitor from kernel boot. I have tried both a thunderbolt cable, where usb devices plugged into the monitor are detected, but the monitor itself is not, and a usbc<->displayport adaptor that puts the socket straight into DP alternate mode. Neither work in 21.04. Happy to try and debug this, but not sure where to start! ProblemType: Bug DistroRelease: Ubuntu 21.04 Package: linux-image-5.11.0-16-generic 5.11.0-16.17 ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12 Uname: Linux 5.11.0-16-generic x86_64 ApportVersion: 2.20.11-0ubuntu65 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: phil 3089 F.... pulseaudio CasperMD5CheckResult: unknown CurrentDesktop: GNOME Date: Thu Apr 22 20:11:35 2021 HibernationDevice: RESUME=UUID=8b5c4d3a-8f9a-420d-a564-3d58a0c0502b InstallationDate: Installed on 2018-07-19 (1008 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0c45:670c Microdia Integrated Webcam HD Bus 001 Device 002: ID 0cf3:e300 Qualcomm Atheros Communications QCA61x4 Bluetooth 4.0 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Dell Inc. XPS 13 9360 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_GB.UTF-8 SHELL=/bin/bash ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.11.0-16-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.11.0-16-generic N/A linux-backports-modules-5.11.0-16-generic N/A linux-firmware 1.197 SourcePackage: linux UpgradeStatus: Upgraded to hirsute on 2021-04-22 (0 days ago) dmi.bios.date: 03/09/2021 dmi.bios.release: 2.15 dmi.bios.vendor: Dell Inc. dmi.bios.version: 2.15.1 dmi.board.name: 0PVG6D dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr2.15.1:bd03/09/2021:br2.15:svnDellInc.:pnXPS139360:pvr:rvnDellInc.:rn0PVG6D:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.family: XPS dmi.product.name: XPS 13 9360 dmi.product.sku: 082A dmi.sys.vendor: Dell Inc. mtime.conffile..etc.apport.crashdb.conf: 2019-04-29T12:11:49.292007 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1925675/+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
