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open-antux
n00b
Joined: 19 Dec 2022
Posts: 10
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 Posted: Sun Apr 28, 2024 12:32 pm Post subject: [SOLVED] parse_vt_settings: Cannot open /dev/tty0 |
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Hi all,
after the last system upgrade (27 April) I'm facing some issue with X, I use greetd as login system with the following configuration:
| Code: | [terminal]
# The VT to run the greeter on. Can be "next", "current" or a number
# designating the VT.
vt = 7
# The default session, also known as the greeter.
[default_session]
# `agreety` is the bundled agetty/login-lookalike. You can replace `$SHELL`
# with whatever you want started, such as `sway`.
# command = "agreety --cmd $SHELL"
command = "tuigreet -t -r --asterisks --power-shutdown 'sudo poweroff' --power-reboot 'sudo reboot' --cmd startx"
# The user to run the command as. The privileges this user must have depends
# on the greeter. A graphical greeter may for example require the user to be
# in the `video` group.
user = "greetd"
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But when I try to login, the Xorg server gives me this error:
| Code: | [ 427.212] (II) NVIDIA dlloader X Driver 550.78 Sun Apr 14 06:27:13 UTC 2024
[ 427.212] (II) NVIDIA Unified Driver for all Supported NVIDIA GPUs
[ 427.212] (EE)
Fatal server error:
[ 427.212] (EE) parse_vt_settings: Cannot open /dev/tty0 (Permission denied)
[ 427.212] (EE)
[ 427.212] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 427.212] (EE) Please also check the log file at "/home/antonio/.local/share/xorg/Xorg.0.log" for additional information.
[ 427.213] (EE)
[ 427.213] (WW) xf86CloseConsole: KDSETMODE failed: Bad file descriptor
[ 427.213] (WW) xf86CloseConsole: VT_GETMODE failed: Bad file descriptor
[ 427.217] (EE) Server terminated with error (1). Closing log file.
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This issue happen only if I try to login via greetd, when I do startx with my normal user I can correctly use my environment.
Does anyone have any ideas?
Additional info:
| Code: | λ ~/ id greetd
uid=396(greetd) gid=396(greetd) gruppi=396(greetd),27(video),97(input)
λ ~/ id antonio # normal user
uid=1000(antonio) gid=1000(antonio) gruppi=1000(antonio),7(lp),10(wheel),27(video),97(input),16(cron),48(docker),509(pipewire),79(libvirt)
λ ~/ eix elogind
[I] sys-auth/elogind
Available versions: 246.10-r3^t (~)252.9^t {+acl audit +cgroup-hybrid debug doc +pam +policykit selinux test}
Installed versions: 252.9^t(13:53:25 18/06/2023)(acl cgroup-hybrid pam policykit -audit -debug -doc -selinux -test)
Homepage: https://github.com/elogind/elogind
Description: The systemd project's logind, extracted to a standalone package
λ ~/ eix xorg-server
[I] x11-base/xorg-server
Available versions: 21.1.13(0/21.1.13)^t **9999(0/9999)*l^t {debug +elogind minimal selinux suid systemd test +udev unwind xcsecurity xephyr xnest xorg xvfb}
Installed versions: 21.1.13(0/21.1.13)^t(10:19:02 13/04/2024)(elogind udev xorg -debug -minimal -selinux -suid -systemd -test -unwind -xcsecurity -xephyr -xnest -xvfb)
Homepage: https://www.x.org/wiki/ https://gitlab.freedesktop.org/xorg/xserver/xorg-server
Description: X.Org X servers
λ ~/ cat .xinitrc
xsetroot -cursor_name left_ptr
exec dbus-launch /home/antonio/.xmonad/xmonad-x86_64-linux
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Last edited by open-antux on Thu May 02, 2024 4:14 pm; edited 1 time in total |
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GDH-gentoo
Veteran
Joined: 20 Jul 2019
Posts: 1699
Location: South America
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| Posted: Sun Apr 28, 2024 3:32 pm Post subject: |
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That's typically Xorg running with an unprivileged user, without meeting the required conditions for that. How do you start greetd?
_________________
| NeddySeagoon wrote: | I'm not a witch, I'm a retired electronics engineer  |
| Ionen wrote: | | As a packager I just don't want things to get messier with weird build systems and multiple toolchains requirements though |
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open-antux
n00b
Joined: 19 Dec 2022
Posts: 10
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| Posted: Sun Apr 28, 2024 4:13 pm Post subject: |
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| GDH-gentoo wrote: | | That's typically Xorg running with an unprivileged user, without meeting the required conditions for that. How do you start greetd? |
Hi GDH-gentoo, thanks for the support.
I followed the documentation here. |
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open-antux
n00b
Joined: 19 Dec 2022
Posts: 10
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| Posted: Mon Apr 29, 2024 11:18 am Post subject: X error: Cannot open virtual console 8 (Permission denied) |
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A little update, I tried to add into the tty group my normal user and greetd user, now the error message is changed but the behavior is the same.
| Code: |
λ ~/ sudo gpasswd -a greetd tty
Password:
Aggiunta dell'utente greetd al gruppo tty
λ ~/ sudo gpasswd -a antonio tty
Aggiunta dell'utente antonio al gruppo tty
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This is the error message:
| Code: |
[ 226.280] Current Operating System: Linux gentoo 6.8.7-gentoo #1 SMP PREEMPT_DYNAMIC Thu Apr 25 08:49:19 CEST 2024 x86_64
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 226.285] (EE)
[ 226.285] (EE) xf86OpenConsole: Cannot open virtual console 8 (Permission denied)
[ 226.285] (EE)
[ 226.285] (EE)
[ 226.285] (EE) Please also check the log file at "/home/antonio/.local/share/xorg/Xorg.0.log" for additional information.
[ 226.285] (EE)
[ 226.285] (EE) Server terminated with error (1). Closing log file.
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EDIT: Changed title with the new error message. |
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Anon-E-moose
Watchman
Joined: 23 May 2008
Posts: 6148
Location: Dallas area
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| Posted: Mon Apr 29, 2024 11:58 am Post subject: |
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So you run the user as "greetd" , what permissions does he have, it's the one executing things from greetd?
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UM780, 6.1 zen kernel, gcc 13, profile 17.0 (custom bare multilib), openrc, wayland |
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open-antux
n00b
Joined: 19 Dec 2022
Posts: 10
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| Posted: Mon Apr 29, 2024 12:20 pm Post subject: |
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| Anon-E-moose wrote: | | So you run the user as "greetd" , what permissions does he have, it's the one executing things from greetd? |
Hi Anon-E-moose, thanks for the support.
Yes, I use greetd user for the login and the command that I execute is startx. |
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Hu
Administrator
Joined: 06 Mar 2007
Posts: 22658
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| Posted: Mon Apr 29, 2024 2:54 pm Post subject: |
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| open-antux wrote: | | A little update, I tried to add into the tty group my normal user and greetd user, now the error message is changed but the behavior is the same. |
You should not do this. On normal systems, a user does not need to be in the tty group, and membership there can be used for some types of attacks. |
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open-antux
n00b
Joined: 19 Dec 2022
Posts: 10
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| Posted: Mon Apr 29, 2024 3:11 pm Post subject: |
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| Hu wrote: | | open-antux wrote: | | A little update, I tried to add into the tty group my normal user and greetd user, now the error message is changed but the behavior is the same. |
You should not do this. On normal systems, a user does not need to be in the tty group, and membership there can be used for some types of attacks. |
Hi Hu, I see, thanks for the annotation, I'll remove those users from the tty group  |
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open-antux
n00b
Joined: 19 Dec 2022
Posts: 10
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| Posted: Wed May 01, 2024 5:52 pm Post subject: |
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Hi all,
after some research, I solved my issue. I'm thinking that the issue is startx, because if I run as command in greetd the issue doesn't appear.
Before I tag this thread as solved, I'd like to understand if this workaround (I think?) could cause me some sort of security issue.
Thanks. |
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entity
Tux's lil' helper
Joined: 16 Jun 2002
Posts: 93
Location: Joensuu, Finland
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| Posted: Thu Aug 01, 2024 7:53 am Post subject: |
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Hi, I got this issue after updating to greetd-0.10.0, which apparently clears XDG_VTNR environment variable in source file session/worker.rs, so whatever you specify in /etc/greetd/config.toml for vt does not work.
| Code: |
// We are done with PAM, clear variables that the child will not need.
let cleared_env = ["XDG_SESSION_CLASS", "XDG_VTNR"];
for e in cleared_env.iter() {
_ = pam.putenv(e);
} |
In greetd-0.10.3 issue is fixed:
| Code: |
// We are done with PAM, clear variables that the child will not need.
_ = pam.putenv(&"XDG_SESSION_CLASS");
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So instead of the previously suggested workaround, upgrading to newer version will also do the trick:
| Code: |
# emerge =greetd-0.10.3
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