GuixSD - problem with X11 forwarding
(address . bug-guix@gnu.org)
cu7a8hbkkcc.fsf@gmail.com
This is still open so I am moving it from user to bugs ...
From: myglc2 <myglc2@gmail.com>
Subject: Re: guixSD - problem with X11 forwarding
Newsgroups: gmane.comp.gnu.guix.user
To: help-guix@gnu.org
Date: Mon, 29 Feb 2016 21:12:51 -0500 (20 weeks, 2 days, 14 hours ago)
ludo@gnu.org (Ludovic Courtès) writes:
Toggle quote (32 lines)
> myglc2 <myglc2@gmail.com> skribis:
>
>> On guixSD, with no packages installed in the login user profile, I get
>> 'X11 forwarding request failed on channel 0'
>
> [...]
>
>> debug1: channel 0: new [client-session]
>> debug1: Entering interactive session.
>> debug1: Requesting X11 forwarding with authentication spoofing.
>> debug1: Sending environment.
>> debug1: Sending env LANG = en_US.UTF-8
>> X11 forwarding request failed on channel 0
>
> Right, I see that as well.
>
> lshd gives some clues in /var/log/messages:
>
> Feb 23 18:14:09 localhost lshd[430]: lshd: Updating utmp for login failed (errno = 2): No such file or directory
> Feb 23 18:14:09 localhost lshd[430]: lshd: xauth invocation failed: exit code: 127
> Feb 23 18:14:33 localhost lshd[430]: lshd: Updating utmpx for logout failed (errno = 2): No such file or directory
> Feb 23 18:14:33 localhost lshd[430]: lshd: write_buffer: Attempt to write data to closed buffer.
> Feb 23 18:14:33 localhost lshd[430]: lshd: Disconnect for reason 11: disconnected by user
>
> Indeed, server_x11.c in lsh reads:
>
> #ifndef XAUTH_PROGRAM
> # define XAUTH_PROGRAM "/usr/X11R6/bin/xauth"
> #endif
>
> I believe this is fixed by commit da35acf.
[...]
Not, at lease, in my setup. I am running GuixSD built from git checkout ...
b006ba5 [behind 15] pull: Update the version string.
On the client, ssh produces ...
'X11 forwarding request failed on channel 0'
On the headless server (g1) in /var/log/messages ...
Jul 21 12:24:51 localhost lshd[381]: lshd: Failed to cd to `/tmp/.X11-unix' (errno = 2): No such file or directory
Jul 21 12:24:51 localhost lshd[381]: lshd: Updating utmp for login failed (errno = 2): No such file or directory
With this workaround ...
sudo mkdir /tmp/.X11-unix
sudo chmod 777 /tmp/.X11-unix
... if I log out and back in X11 forwarding "works" and in
/var/log/messages ...
Jul 21 12:33:44 localhost lshd[381]: lshd: Updating utmp for login failed (errno = 2): No such file or directory
When I logout, in /var/log/messages I see ...
Jul 21 12:36:06 localhost lshd[381]: lshd: Updating utmpx for logout failed (errno = 2): No such file or directory
Jul 21 12:36:06 localhost lshd[381]: lshd: write_buffer: Attempt to write data to closed buffer.
Jul 21 12:36:06 localhost lshd[381]: lshd: Disconnect for reason 11: disconnected by user
Of course, the workaround needs to be re-applied each time the server is
rebooted.
The system and user configs are attached below ;-)