Public bug reported: Observed logs:
May 22 10:45:04 ENVY agetty[85340]: -: failed to get terminal attributes: Input/output error May 22 10:45:14 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 10:45:15 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1089. May 22 10:45:15 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:45:15 ENVY agetty[85353]: could not get terminal name: -22 May 22 10:45:15 ENVY agetty[85353]: -: failed to get terminal attributes: Input/output error I'm also adding some additional info about the system. ===== date ===== 2026-05-22T10:58:51+03:00 ===== lsb_release -a ===== Distributor ID: Ubuntu Description: Ubuntu 26.04 LTS Release: 26.04 Codename: resolute ===== uname -a ===== Linux ENVY 7.0.0-15-generic #15-Ubuntu SMP PREEMPT_DYNAMIC Wed Apr 22 16:06:43 UTC 2026 x86_64 GNU/Linux ===== /proc/cmdline ===== snapd_recovery_mode=run console=ttyS0,115200n8 console=tty1 panic=-1 quiet splash snapd.xkb="us,pc105,,grp_led:scroll" ===== systemctl status [email protected] ===== ● [email protected] - Serial Getty on ttyS0 Loaded: loaded (/usr/lib/systemd/system/[email protected]; enabled-runtime; preset: enabled) Active: active (running) since Fri 2026-05-22 10:58:44 EEST; 6s ago Invocation: 86cc3ee986284e449a9254fb18d1a999 Docs: man:agetty(8) man:systemd-getty-generator(8) https://0pointer.de/blog/projects/serial-console.html Main PID: 91357 (agetty) Tasks: 1 (limit: 34255) Memory: 304K (peak: 2M) CPU: 15ms CGroup: /system.slice/system-serial\x2dgetty.slice/[email protected] └─91357 /usr/sbin/agetty --noreset --noclear --issue-file=/etc/issue:/etc/issue.d:/run/issue.d:/usr/lib/issue.d --keep-baud 115200,57600,38400,9600 - vt220 May 22 10:58:44 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1168. May 22 10:58:44 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:44 ENVY agetty[91357]: could not get terminal name: -22 May 22 10:58:44 ENVY agetty[91357]: -: failed to get terminal attributes: Input/output error ===== systemctl cat [email protected] ===== # /usr/lib/systemd/system/[email protected] # SPDX-License-Identifier: LGPL-2.1-or-later # # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version. [Unit] Description=Serial Getty on %I Documentation=man:agetty(8) man:systemd-getty-generator(8) Documentation=https://0pointer.de/blog/projects/serial-console.html BindsTo=dev-%i.device After=dev-%i.device systemd-user-sessions.service plymouth-quit-wait.service getty-pre.target After=rc-local.service # If additional gettys are spawned during boot then we should make # sure that this is synchronized before getty.target, even though # getty.target didn't actually pull it in. Before=getty.target IgnoreOnIsolate=yes # IgnoreOnIsolate causes issues with sulogin, if someone isolates # rescue.target or starts rescue.service from multi-user.target or # graphical.target. Conflicts=rescue.service Before=rescue.service [Service] ExecStart=-/usr/sbin/agetty --noreset --noclear --issue-file=/etc/issue:/etc/issue.d:/run/issue.d:/usr/lib/issue.d --keep-baud 115200,57600,38400,9600 - ${TERM} Type=idle Restart=always UtmpIdentifier=%I StandardInput=tty StandardOutput=tty TTYPath=/dev/%I TTYReset=yes TTYVHangup=yes IgnoreSIGPIPE=no SendSIGHUP=yes ImportCredential=tty.serial.%I.agetty.*:agetty. ImportCredential=tty.serial.%I.login.*:login. ImportCredential=agetty.* ImportCredential=login.* ImportCredential=shell.* [Install] WantedBy=getty.target ===== journalctl -b -u [email protected] ===== May 22 07:39:09 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 07:39:09 ENVY agetty[5486]: could not get terminal name: -22 May 22 07:39:09 ENVY agetty[5486]: -: failed to get terminal attributes: Input/output error May 22 07:39:19 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 07:39:19 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1. May 22 07:39:19 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 07:39:19 ENVY agetty[5587]: could not get terminal name: -22 May 22 07:39:19 ENVY agetty[5587]: -: failed to get terminal attributes: Input/output error May 22 07:39:29 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 07:39:30 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 2. May 22 10:58:24 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:24 ENVY agetty[91303]: could not get terminal name: -22 May 22 10:58:24 ENVY agetty[91303]: -: failed to get terminal attributes: Input/output error May 22 10:58:34 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 10:58:34 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1167. May 22 10:58:34 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:34 ENVY agetty[91334]: could not get terminal name: -22 May 22 10:58:34 ENVY agetty[91334]: -: failed to get terminal attributes: Input/output error May 22 10:58:44 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 10:58:44 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1168. May 22 10:58:44 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:44 ENVY agetty[91357]: could not get terminal name: -22 May 22 10:58:44 ENVY agetty[91357]: -: failed to get terminal attributes: Input/output error ===== ls -l /dev/ttyS0 ===== crw------- 1 root tty 4, 64 May 22 07:38 /dev/ttyS0 ===== dmesg serial/ttyS/8250 lines ===== ===== systemctl is-enabled [email protected] ===== enabled-runtime ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: systemd 259.5-0ubuntu3 ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0 Uname: Linux 7.0.0-15-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Fri May 22 10:56:11 2026 MachineType: HP HP Pro SFF 400 G9 Desktop PC ProcEnviron: LANG=en_US.UTF-8 PATH=(custom, no user) SHELL=/bin/bash TERM=xterm-256color ProcKernelCmdLine: snapd_recovery_mode=run console=ttyS0,115200n8 console=tty1 panic=-1 quiet splash snapd.xkb="us,pc105,,grp_led:scroll" SourcePackage: systemd SystemdFailedUnits: Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use systemd-escape?). Unit \xe2\x97\x8f.service could not be found. UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/09/2026 dmi.bios.release: 21.0 dmi.bios.vendor: HP dmi.bios.version: U03 Ver. 02.21.00 dmi.board.name: 8954 dmi.board.vendor: HP dmi.board.version: KBC Version 12.03.55 dmi.chassis.type: 3 dmi.chassis.vendor: HP dmi.ec.firmware.release: 18.3 dmi.modalias: dmi:bvnHP:bvrU03Ver.02.21.00:bd01/09/2026:br21.0:efr18.3:svnHP:pnHPProSFF400G9DesktopPC:pvrSBKPFV3:rvnHP:rn8954:rvrKBCVersion12.03.55:cvnHP:ct3:cvr:sku6U3M3EA#AKS:pfa103C_53307FHPProDesk: dmi.product.family: 103C_53307F HP ProDesk dmi.product.name: HP Pro SFF 400 G9 Desktop PC dmi.product.sku: 6U3M3EA#AKS dmi.product.version: SBKPFV3 dmi.sys.vendor: HP ** Affects: systemd (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute ** Description changed: Observed logs: May 22 10:45:04 ENVY agetty[85340]: -: failed to get terminal attributes: Input/output error May 22 10:45:14 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 10:45:15 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1089. May 22 10:45:15 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:45:15 ENVY agetty[85353]: could not get terminal name: -22 May 22 10:45:15 ENVY agetty[85353]: -: failed to get terminal attributes: Input/output error - - - - - I'm also adding some additional info abot the system. + I'm also adding some additional info about the system. ===== date ===== 2026-05-22T10:58:51+03:00 ===== lsb_release -a ===== Distributor ID: Ubuntu Description: Ubuntu 26.04 LTS Release: 26.04 Codename: resolute ===== uname -a ===== Linux ENVY 7.0.0-15-generic #15-Ubuntu SMP PREEMPT_DYNAMIC Wed Apr 22 16:06:43 UTC 2026 x86_64 GNU/Linux ===== /proc/cmdline ===== snapd_recovery_mode=run console=ttyS0,115200n8 console=tty1 panic=-1 quiet splash snapd.xkb="us,pc105,,grp_led:scroll" ===== systemctl status [email protected] ===== ● [email protected] - Serial Getty on ttyS0 - Loaded: loaded (/usr/lib/systemd/system/[email protected]; enabled-runtime; preset: enabled) - Active: active (running) since Fri 2026-05-22 10:58:44 EEST; 6s ago - Invocation: 86cc3ee986284e449a9254fb18d1a999 - Docs: man:agetty(8) - man:systemd-getty-generator(8) - https://0pointer.de/blog/projects/serial-console.html - Main PID: 91357 (agetty) - Tasks: 1 (limit: 34255) - Memory: 304K (peak: 2M) - CPU: 15ms - CGroup: /system.slice/system-serial\x2dgetty.slice/[email protected] - └─91357 /usr/sbin/agetty --noreset --noclear --issue-file=/etc/issue:/etc/issue.d:/run/issue.d:/usr/lib/issue.d --keep-baud 115200,57600,38400,9600 - vt220 + Loaded: loaded (/usr/lib/systemd/system/[email protected]; enabled-runtime; preset: enabled) + Active: active (running) since Fri 2026-05-22 10:58:44 EEST; 6s ago + Invocation: 86cc3ee986284e449a9254fb18d1a999 + Docs: man:agetty(8) + man:systemd-getty-generator(8) + https://0pointer.de/blog/projects/serial-console.html + Main PID: 91357 (agetty) + Tasks: 1 (limit: 34255) + Memory: 304K (peak: 2M) + CPU: 15ms + CGroup: /system.slice/system-serial\x2dgetty.slice/[email protected] + └─91357 /usr/sbin/agetty --noreset --noclear --issue-file=/etc/issue:/etc/issue.d:/run/issue.d:/usr/lib/issue.d --keep-baud 115200,57600,38400,9600 - vt220 May 22 10:58:44 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1168. May 22 10:58:44 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:44 ENVY agetty[91357]: could not get terminal name: -22 May 22 10:58:44 ENVY agetty[91357]: -: failed to get terminal attributes: Input/output error ===== systemctl cat [email protected] ===== # /usr/lib/systemd/system/[email protected] # SPDX-License-Identifier: LGPL-2.1-or-later # # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version. [Unit] Description=Serial Getty on %I Documentation=man:agetty(8) man:systemd-getty-generator(8) Documentation=https://0pointer.de/blog/projects/serial-console.html BindsTo=dev-%i.device After=dev-%i.device systemd-user-sessions.service plymouth-quit-wait.service getty-pre.target After=rc-local.service # If additional gettys are spawned during boot then we should make # sure that this is synchronized before getty.target, even though # getty.target didn't actually pull it in. Before=getty.target IgnoreOnIsolate=yes # IgnoreOnIsolate causes issues with sulogin, if someone isolates # rescue.target or starts rescue.service from multi-user.target or # graphical.target. Conflicts=rescue.service Before=rescue.service [Service] ExecStart=-/usr/sbin/agetty --noreset --noclear --issue-file=/etc/issue:/etc/issue.d:/run/issue.d:/usr/lib/issue.d --keep-baud 115200,57600,38400,9600 - ${TERM} Type=idle Restart=always UtmpIdentifier=%I StandardInput=tty StandardOutput=tty TTYPath=/dev/%I TTYReset=yes TTYVHangup=yes IgnoreSIGPIPE=no SendSIGHUP=yes ImportCredential=tty.serial.%I.agetty.*:agetty. ImportCredential=tty.serial.%I.login.*:login. ImportCredential=agetty.* ImportCredential=login.* ImportCredential=shell.* [Install] WantedBy=getty.target ===== journalctl -b -u [email protected] ===== May 22 07:39:09 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 07:39:09 ENVY agetty[5486]: could not get terminal name: -22 May 22 07:39:09 ENVY agetty[5486]: -: failed to get terminal attributes: Input/output error May 22 07:39:19 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 07:39:19 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1. May 22 07:39:19 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 07:39:19 ENVY agetty[5587]: could not get terminal name: -22 May 22 07:39:19 ENVY agetty[5587]: -: failed to get terminal attributes: Input/output error May 22 07:39:29 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 07:39:30 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 2. May 22 10:58:24 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:24 ENVY agetty[91303]: could not get terminal name: -22 May 22 10:58:24 ENVY agetty[91303]: -: failed to get terminal attributes: Input/output error May 22 10:58:34 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 10:58:34 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1167. May 22 10:58:34 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:34 ENVY agetty[91334]: could not get terminal name: -22 May 22 10:58:34 ENVY agetty[91334]: -: failed to get terminal attributes: Input/output error May 22 10:58:44 ENVY systemd[1]: [email protected]: Deactivated successfully. May 22 10:58:44 ENVY systemd[1]: [email protected]: Scheduled restart job, restart counter is at 1168. May 22 10:58:44 ENVY systemd[1]: Started [email protected] - Serial Getty on ttyS0. May 22 10:58:44 ENVY agetty[91357]: could not get terminal name: -22 May 22 10:58:44 ENVY agetty[91357]: -: failed to get terminal attributes: Input/output error ===== ls -l /dev/ttyS0 ===== crw------- 1 root tty 4, 64 May 22 07:38 /dev/ttyS0 ===== dmesg serial/ttyS/8250 lines ===== ===== systemctl is-enabled [email protected] ===== enabled-runtime ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: systemd 259.5-0ubuntu3 ProcVersionSignature: Ubuntu 7.0.0-15.15-generic 7.0.0 Uname: Linux 7.0.0-15-generic x86_64 ApportVersion: 2.34.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Fri May 22 10:56:11 2026 MachineType: HP HP Pro SFF 400 G9 Desktop PC ProcEnviron: - LANG=en_US.UTF-8 - PATH=(custom, no user) - SHELL=/bin/bash - TERM=xterm-256color + LANG=en_US.UTF-8 + PATH=(custom, no user) + SHELL=/bin/bash + TERM=xterm-256color ProcKernelCmdLine: snapd_recovery_mode=run console=ttyS0,115200n8 console=tty1 panic=-1 quiet splash snapd.xkb="us,pc105,,grp_led:scroll" SourcePackage: systemd SystemdFailedUnits: - Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use systemd-escape?). - Unit \xe2\x97\x8f.service could not be found. + Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use systemd-escape?). + Unit \xe2\x97\x8f.service could not be found. UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/09/2026 dmi.bios.release: 21.0 dmi.bios.vendor: HP dmi.bios.version: U03 Ver. 02.21.00 dmi.board.name: 8954 dmi.board.vendor: HP dmi.board.version: KBC Version 12.03.55 dmi.chassis.type: 3 dmi.chassis.vendor: HP dmi.ec.firmware.release: 18.3 dmi.modalias: dmi:bvnHP:bvrU03Ver.02.21.00:bd01/09/2026:br21.0:efr18.3:svnHP:pnHPProSFF400G9DesktopPC:pvrSBKPFV3:rvnHP:rn8954:rvrKBCVersion12.03.55:cvnHP:ct3:cvr:sku6U3M3EA#AKS:pfa103C_53307FHPProDesk: dmi.product.family: 103C_53307F HP ProDesk dmi.product.name: HP Pro SFF 400 G9 Desktop PC dmi.product.sku: 6U3M3EA#AKS dmi.product.version: SBKPFV3 dmi.sys.vendor: HP -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2153981 Title: Ubuntu 26.04 repeatedly starts [email protected] even though ttyS0 is unusable, causing journal spam and a service restart loop. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2153981/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
