I can confirm dmesg on Ubuntu 21.10 gives me "Operation not permitted", even though my user is in the "adm" group:
$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 21.10 Release: 21.10 Codename: impish $ ls -l /var/log/dmesg* -rw-r----- 1 root adm 100336 Mar 13 17:01 /var/log/dmesg -rw-r----- 1 root adm 94365 Mar 13 16:40 /var/log/dmesg.0 -rw-r----- 1 root adm 23990 Mar 13 15:00 /var/log/dmesg.1.gz -rw-r----- 1 root adm 23017 Mar 9 21:50 /var/log/dmesg.2.gz -rw-r----- 1 root adm 23295 Mar 4 18:51 /var/log/dmesg.3.gz -rw-r----- 1 root adm 23253 Feb 24 21:34 /var/log/dmesg.4.gz $ id uid=1000(marji) gid=1000(marji) groups=1000(marji),4(adm),5(tty),10(uucp),20(dialout),24(cdrom),27(sudo),30(dip),46(plugdev),121(lpadmin),132(lxd),133(sambashare),134(docker) $ dmesg dmesg: read kernel buffer failed: Operation not permitted -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to util-linux in Ubuntu. https://bugs.launchpad.net/bugs/1952353 Title: dmesg: read kernel buffer failed: Operation not permitted Status in util-linux package in Ubuntu: Invalid Bug description: Run /bin/dmesg, get: dmesg: read kernel buffer failed: Operation not permitted sudo dmesg works, but I should not have to do that. ProblemType: Bug DistroRelease: Ubuntu 21.10 Package: util-linux 2.36.1-8ubuntu2 ProcVersionSignature: Ubuntu 5.13.0-21.21-generic 5.13.18 Uname: Linux 5.13.0-21-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu71 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Thu Nov 25 11:13:58 2021 ProcEnviron: LANGUAGE=en_US TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> SHELL=/bin/tcsh SourcePackage: util-linux UpgradeStatus: Upgraded to impish on 2021-11-21 (3 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/1952353/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
