i booted to vmlinuz-4.15.0-129-generic, see the attached dmesg -T output. first, i had the keyboard plugged into the front port. There was one reset message. I replugged it to the port on the back where the problem occurs more regularly. Some more messages appeared after a while. Anyway, the keyboard was not stuck at all during the time, like it is on the 5.x kernel.
** Attachment added: "dmesg.time.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1912828/+attachment/5455979/+files/dmesg.time.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/1912828 Title: USB resets since upgrade to 20.04 Status in linux package in Ubuntu: Incomplete Bug description: since upgrading from 18.04 to 20.04 i experience interruptions of my usb keyboard every few minutes. during these events either keys are ignored or get repeated until i press the same key again. in dmesg it is shown like this: [206129.443725] usb 2-1.4: reset full-speed USB device number 7 using ehci-pci [206131.063578] usb 2-1.4: reset full-speed USB device number 7 using ehci-pci [206132.719719] usb 2-1.4: reset full-speed USB device number 7 using ehci-pci [206134.143584] usb 2-1.4: reset full-speed USB device number 7 using ehci-pci [206135.923480] usb 2-1.4: reset full-speed USB device number 7 using ehci-pci i tried plugging it to different usb ports. it happens on any ports but i noticed it happens way more frequently on the ports on the backside of the PC than on the front side (they happen to be different usb busses). i also did upgrade the BIOS to the latest version, but that did not change the behavior at all. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.4.0-62-generic 5.4.0-62.70 ProcVersionSignature: Ubuntu 5.4.0-62.70-generic 5.4.78 Uname: Linux 5.4.0-62-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.14 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: twix 3831 F.... pulseaudio /dev/snd/pcmC0D0p: twix 3831 F...m pulseaudio /dev/snd/controlC2: twix 3831 F.... pulseaudio /dev/snd/controlC1: twix 3831 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: KDE Date: Fri Jan 22 18:56:19 2021 HibernationDevice: RESUME=UUID=fd4b40d6-dd20-49d8-a82f-36efaec3481b InstallationDate: Installed on 2016-06-26 (1671 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) MachineType: Dell Inc. Studio XPS 8100 ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-62-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.4.0-62-generic N/A linux-backports-modules-5.4.0-62-generic N/A linux-firmware 1.187.7 RfKill: 0: hci0: Bluetooth Soft blocked: yes Hard blocked: no SourcePackage: linux UpgradeStatus: Upgraded to focal on 2021-01-05 (17 days ago) dmi.bios.date: 07/08/2010 dmi.bios.vendor: Dell Inc. dmi.bios.version: A05 dmi.board.name: 0T568R dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 3 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA05:bd07/08/2010:svnDellInc.:pnStudioXPS8100:pvr:rvnDellInc.:rn0T568R:rvrA00:cvnDellInc.:ct3:cvr: dmi.product.name: Studio XPS 8100 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1912828/+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
