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no applications start after WiFi connects

Artix LXQt OpenRC

After connecting wifi applications launched give this error

Code: [Select]
$ kwrite
Invalid MIT-MAGIC-COOKIE-1 key
qt.qpa.xcb: could not connect to display :0
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.

Aborted

Disconnecting wifi launches app as normal.

Please advise

Re: no applications start after WiFi connects

Reply #1 –
Quote from: n00b – on
Artix LXQt OpenRC

After connecting wifi applications launched give this error

Code: [Select]
$ kwrite
Invalid MIT-MAGIC-COOKIE-1 key
qt.qpa.xcb: could not connect to display :0
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.

Aborted

Disconnecting wifi launches app as normal.

Please advise

i'll start with the most obvious.  The error says to reinstall xcb.  Did you try that while connected to wifi?
Cat Herders of Linux

Re: no applications start after WiFi connects

Reply #2 –
I seem to remember hearing about issues along the lines of problems with X because NetworkManager was changing the hostname when establishing a connection and X expects the hostname to stay the same once started.

But this is only a vague memory. I've had a search on here but can't find the post so maybe it was a dream  :)

But
Code: [Select]
hostname
issued before and after connecting to the wifi could be useful? Post output.
Quote
Invalid MIT-MAGIC-COOKIE-1 key
is an X permissions thing. Search the error and you'll see.

Re: no applications start after WiFi connects

Reply #3 –
Quote from: n00b – on
Artix LXQt OpenRC

After connecting wifi applications launched give this error

Code: [Select]
$ kwrite
Invalid MIT-MAGIC-COOKIE-1 key
qt.qpa.xcb: could not connect to display :0
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, xcb.

Aborted

Disconnecting wifi launches app as normal.

Please advise

I have had that problem on the live iso of that flavour in the past. I did find that on installation the problem disappears.

@gripped is correct that it is the hostname that causes the problem, though I can't remember the solution. However, I found that by opening the installer and/or any other programs you need to run BEFORE connecting to wifi, I was able to install satisfactorily.

Re: no applications start after WiFi connects

Reply #4 –
Hi. I got the same problem with 3 notebooks and I solved it modifying /etc/NetworkManager/NetworkManager.conf in this way:

[main]
plugins=keyfile
hostname-node=none

I'm using networkmanager, but in the last installation I got the same problem with connman. Probably I'll replace connman with networkmanager, if I wont be able to find a solution with connman.

Re: no applications start after WiFi connects

Reply #5 –
Just updated networkmanager with the changes in the conf file. After next update is available on your mirror, it should work as expected.

Re: no applications start after WiFi connects

Reply #6 –
issue went away. I assume because
Quote from: ndowens – on
Just updated networkmanager with the changes in the conf file. After next update is available on your mirror, it should work as expected.

All works.

Got new kernel. Perhaps that tiggered the issue again?

fully updated as of now.
uninstalled the wireless driver.
reinstalled the wireless driver.

Still have the same issue.

disconnecting wifi, all works fine

Please advise

Quote from: gripped – on
I seem to remember hearing about issues along the lines of problems with X because NetworkManager was changing the hostname when establishing a connection and X expects the hostname to stay the same once started.

But this is only a vague memory. I've had a search on here but can't find the post so maybe it was a dream  :)

But
Code: [Select]
hostname
issued before and after connecting to the wifi could be useful? Post output.is an X permissions thing. Search the error and you'll see.
Pre wireless connection
hostname
box

Post
hostname
unknownREDACTED.attlocal.net

Quote from: cat herders of linux – on
i'll start with the most obvious.  The error says to reinstall xcb.  Did you try that while connected to wifi?
yes. no change.

Re: no applications start after WiFi connects

Reply #7 –
I went through all the places and set hostname to a specific thing and that worked.

Re: no applications start after WiFi connects

Reply #8 –
Please tell me where what they changed, starded with the same problem, the Networkmanager folder is not along the path /etc