Here is the danger of this bug on a laptop (as I've experienced): The system, from all appearances looks powered down (with the exception of the power indicator which remains lit on my laptop). Unfortunately, the power indicator is not in a conspicuous place which means that in order to *verify* the system is off, I have to lean over and look at the side of the laptop.
When a user gets into the habit of a system just working, checking the power indicator slips the mind. Hence, a powered on laptop may be placed inside a tightly insulated laptop bag. When this happened to me, I didn't discover it for about 2 hours. When I went to take the laptop out of the bag, the fan was now running trying to keep the internals cool, but the bag was insulated (padded). This resulted in the system being so hot that I could not even touch the keyboard in places without getting mildly burned. I have no idea what will happen to a discharging lithium battery that is being heated rather than cooled in that situation, but I imagine there may be a component of definite risk to a system. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.13 in Ubuntu. https://bugs.launchpad.net/bugs/1958724 Title: System Shutdown and resume hangs since Kernel linux- image-5.13.0-23-generic Status in linux-signed-hwe-5.13 package in Ubuntu: Confirmed Bug description: Hi, on my Medion E14304 Ubuntu was working fine until Kernel 5.13.0.21. Since Version 5.13.0.23 System Shutdown and resume hangs. The System does not stop also after a long time. The last messages in recovery mode on the root console are: Reached target Power-off ... systemd-udevd[295]: ... Worker [311] processing SEQNUM=3047 is taking time Waiting for process systemd-udevd, systemd-udevd Perhaps my attached dmesg and lsmod helps. All messages are in one file. Thank you very much. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.13.0-27-generic 5.13.0-27.29~20.04.1 ProcVersionSignature: Ubuntu 5.13.0-27.29~20.04.1-generic 5.13.19 Uname: Linux 5.13.0-27-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Sat Jan 22 16:59:05 2022 InstallationDate: Installed on 2021-12-25 (27 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=de_DE.UTF-8 SHELL=/bin/bash SourcePackage: linux-signed-hwe-5.13 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.13/+bug/1958724/+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
