Re: Fedora33 slow su and ssh due to XAUTHORITY env

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On 01/02/2021 06:45, Ed Greshko wrote:
On 01/02/2021 14:31, Terry Barnaby wrote:
On 01/02/2021 06:23, Terry Barnaby wrote:
In the last day or so my system has been showing long delays (> 30 secs) when doing a "su -" or "ssh" from an konsole terminal application that has been opened as a manual session setup at KDE startup.

Investigating the konsole has the environment variable "XAUTHORITY=/var/run/sddm/xauth_nsAoIs". Now if you open a konsole from a right hand mouse button click popup on the desktop, that konsole has "XAUTHORITY=/tmp/xauth-1002-_0" and suffers no delays. Opening konsole from the main "F" start menu has "XAUTHORITY=/var/run/sddm/xauth_nsAoIs" and so has delays.

Any ideas on what is going on here ? There was an update to sddm recently ...

Further point, downgrading sddm to 0.18.1-8.fc33 fixes the issue, so definitely something todo with changes in sddm. But is sddm now correct and some of my older config wrong ?

Also, FWIW, on an F32 system....

R-click start XAUTHORITY=/home/egreshko/.Xauthority
Menu start XAUTHORITY=/tmp/xauth-1026-_0

[egreshko@f32k ~]$ cmp -b /home/egreshko/.Xauthority /tmp/xauth-1026-_0
[egreshko@f32k ~]$

[egreshko@f32k ~]$ rpm -q sddm
sddm-0.18.1-4.fc32.x86_64

And on the F33 system...

[egreshko@meimei ~]$ cmp -b /tmp/xauth-1026-_0 /var/run/sddm/xauth_umbOSp
[egreshko@meimei ~]$


In my case the /tmp/xauth-1002-_0 and /var/run/sddm/xauth_xpDgqp files also have the same content. The ~/.Xauthority is different however. Removing ~/.Xauthority does not appear to have any effect.

In my case I also have "ForwardX11 yes" in .ssh/config as I use X11 apps over ssh quite frequently. Removing that allows ssh to be quick (as expected) although "su -" is still slow.

Note I am using X11 rather than Wayland.
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