Arch Linux

ziomarco

Member

From: italy

Registered: 2018-09-09

Posts: 29

[SOLVED] LXDE unable to start any program

After an update made on July the 12th, LXDE is no longer able to start any application from menu or from application bar. The computer is NOT freezed: i have Lxterminal in autostart and it's running normally.
Bash commands work smoothly, But every program I try to start from Lxterminal (that in normal condition would work without problems) show the same error, here some examples:

gparted 

Authorization required, but no authorization protocol specified

(gpartedbin:6702): Gtk-WARNING **: 12:55:09.244: cannot open display: :0

chromium

Authorization required, but no authorization protocol specified

[884:884:0714/125337.923424:ERROR:ozone_platform_x11.cc(244)] Missing X server or $DISPLAY
[884:884:0714/125337.923453:ERROR:env.cc(258)] The platform failed to initialize.  Exiting.

firefox

Authorization required, but no authorization protocol specified

Error: cannot open display: :0

 

So i tried downgrade the system back to July the 5th and everything started working again.

If from this working state I run an update, the problem returns.

I tried to update with lxde in IgnoreGroup in pacman.conf with no success... so I don't know how to solve it

Last edited by ziomarco (2024-07-19 09:25:36)

ziomarco

Member

From: italy

Registered: 2018-09-09

Posts: 29

Re: [SOLVED] LXDE unable to start any program

after a whole day of back and forth....with the last pacman -Syu the problem is resolved by itself
Much ado about nothing

Last edited by ziomarco (2024-07-14 18:56:45)

ziomarco

Member

From: italy

Registered: 2018-09-09

Posts: 29

Re: [SOLVED] LXDE unable to start any program

It happens again!  This make me crazy....
I found a workaround: when the problem occurs

systemctl restart lxdm 

resolves the issue.
this suggest that something is starting in the wrong sequence...

Last edited by ziomarco (2024-07-18 10:18:34)

seth

Member

Registered: 2012-09-03

Posts: 60,792

Re: [SOLVED] LXDE unable to start any program

hostnamectl

https://wiki.archlinux.org/title/Networ … e_hostname

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

ziomarco

Member

From: italy

Registered: 2018-09-09

Posts: 29

Re: [SOLVED] LXDE unable to start any program

thank you seth, yuor suggest did the trick!

seth

Member

Registered: 2012-09-03

Posts: 60,792

Re: [SOLVED] LXDE unable to start any program

Your homework is gonna be to figure "why"

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

ziomarco

Member

From: italy

Registered: 2018-09-09

Posts: 29

Re: [SOLVED] LXDE unable to start any program

After your help I realized that Xorg and LXDE looks at hostname before starting a program. In my case /etc/hostname was not set

The new questions are: this Arch installation date from 2022, why does the problem arises only now?
why the applications started by LXDE autostart worked well and the ones started by mouse click or from console failed ?

seth

Member

Registered: 2012-09-03

Posts: 60,792

Re: [SOLVED] LXDE unable to start any program

The problem is that w/o a static hostname, your networkmanager (certainly "NetworkManager") will get you a dynamic one via dhcp.
Since X11 is a network protocol that accidentally also can color pixels, pretty much everything is FQDN sensitive, the XAUTHORITY cookie is bound to the domain name and if that changes *after* X11 started, things break because you're running X11 on the "wrong" host.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc