Public bug reported: Issue seen on 26.04 and probably other series as well.
ubuntu@dell-latitude-5411-c27717:~$ uname -a Linux dell-latitude-5411-c27717 7.0.0-15-generic #15-Ubuntu SMP PREEMPT_DYNAMIC Wed Apr 22 16:06:43 UTC 2026 x86_64 GNU/Linux ubuntu@dell-latitude-5411-c27717:~$ cat /sys/class/rtc/rtc0/since_epoch 1791307002 # Update to 7.0.0-39-generic and reboot ubuntu@dell-latitude-5411-c27717:~$ uname -a Linux dell-latitude-5411-c27717 7.0.0-39-generic #39-Ubuntu SMP PREEMPT_DYNAMIC Thu Sep 24 11:18:19 UTC 2026 x86_64 GNU/Linux ubuntu@dell-latitude-5411-c27717:~$ cat /sys/class/rtc/rtc0/since_epoch cat: /sys/class/rtc/rtc0/since_epoch: No such file or directory ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-39-generic 7.0.0-39.39 ProcVersionSignature: Ubuntu 7.0.0-39.39-generic 7.0.14 Uname: Linux 7.0.0-39-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 2123 F.... wireplumber /dev/snd/seq: ubuntu 2102 F.... pipewire CasperMD5CheckResult: pass CloudArchitecture: x86_64 CloudID: maas CloudName: maas CloudPlatform: maas CloudSubPlatform: seed-dir (http://10.102.160.2:5248/MAAS/metadata/) Date: Wed Oct 7 01:19:33 2026 InstallationDate: Installed on 2026-05-19 (141 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) IwDevWlo1Link: Not connected. MachineType: Dell Inc. Latitude 5411 ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-39-generic root=UUID=16b44133-d26e-466c-8e12-da20de044692 ro quiet splash crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/03/2020 dmi.bios.release: 1.1 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.1.5 dmi.board.vendor: Dell Inc. dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.1.5:bd05/03/2020:br1.1:svnDellInc.:pnLatitude5411:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr:sku09C0:pfaLatitude: dmi.product.family: Latitude dmi.product.name: Latitude 5411 dmi.product.sku: 09C0 dmi.sys.vendor: Dell Inc. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug package-from-proposed resolute -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2169736 Title: RTC device disappears after updating to 7.0.0-39-generic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2169736/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
