** Summary changed: - systemd-fsckd : useless CR displayed on console + systemd-fsckd: useless CR displayed on console
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1692353 Title: systemd-fsckd: useless CR displayed on console Status in systemd package in Ubuntu: Fix Released Bug description: Hello, My system is "Ubuntu 16.04.2 LTS" (grep DISTRIB_DESCRIPTION /etc/lsb- release). The systemd package is installed: $ dpkg -l | grep systemd > systemd 229-4ubuntu17 I noticed that approximately 15 seconds after the boot, a useless Carriage Return ('\r') is displayed on the console (/dev/console). This character interacts with the display of the user currently logued in on the console. This screws the current line, when users is pressing keys. After monitoring system activity, I found the culprit: /lib/systemd/system/systemd-fsckd.service To test, run: service systemd-fsckd stop # In case, it is still running. service systemd-fsckd start Go to the console, wait for approximately 15 seconds, and you see the cursor jumping from its current position to the beginning of the line. This is the BUG. Note: the console is not the X11 terminal (xterm, lxterminal, etc.) ; the console is the text tty reached with Control-Alt-F1. The systemd-fsckd.service starts the following daemon: /lib/systemd/systemd-fsckd This is the daemon which displays two useless '\r' characters. I went to: http://packages.ubuntu.com/xenial/systemd I downloaded: http://archive.ubuntu.com/ubuntu/pool/main/s/systemd/systemd_229-4ubuntu10.debian.tar.xz The file debian/patches/fsckd-daemon-for-inter-fsckd-communication.patch contains: +static int manager_write_console(Manager *m, const char *message) { [...] + if (message) { + fprintf(console, "\r%s\r%n", message, &l); + if (m->clear < (size_t)l) + m->clear = (size_t)l; + } else { + fputc('\r', console); + for (j = 0; j < m->clear; j++) + fputc(' ', console); + fputc('\r', console); + } So, when no message was previously displayed, "m->clear" is still set to 0. Then, when the program ends it calls: + /* clear last line */ + manager_write_console(m, NULL); However, in the "else" above, two '\r' characters are displayed, surrounding no space characters. So, when no message was previously displayed, there is nothing to clear, so no '\r' character to display. A trivial patch is attached. It is untested. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1692353/+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
