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Hello! I've installed arch linux recently. Had a problem with connecting to wi-fi, but installing linux-firmware solved this problem. But now I've encountered very strange problem. When my wi-fi is working, I can't open any application neither using GUI (I'm using KDE plasma) nor from command line. But if wi-fi is off I can launch applications, and they will be working fine after I put wi-fi on. If I try to launch application from command line I get this:
[kolupaev@archlinux ~]$ dolphin
Authorization required, but no authorization protocol specified
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 (core dumped)
If I try to launch using GUI nothing happens. If the wi-fi is disabled the application will be launched but with a warning:
Qt: Session management error: networkIdsList argument is NULL
So I've tried to update packages, to reinstall KDE, to download another desktop environment (xfce). The last one resulted in another problem, in xfce wi-fi doesn't work. In KDE I'm putying it on/off with GUI. In xfce I tried to connect to it manually using iwd, that doesn't work: when I used:
[iwd]# station wlan0 connect Vodafone-947C
It just asks for passphrase, after entering nothing happens. And I can see that IP wasn't assigned to interface:
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: enp7s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether 08:97:98:97:12:63 brd ff:ff:ff:ff:ff:ff
4: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 5e:85:c5:a9:6c:c1 brd ff:ff:ff:ff:ff:ff permaddr b8:9a:2a:54:d1:3e
Also while troubleshooting I've found arch linux installation guide, where the similar problem was mentioned in Gnome (around 1 h. 44 m.), but the method to solve it was to change regional settings, which in my case look fine.
So my thought is that I've messed up the wi-fi settings somehow. And question is: what am I doing wrong and how can I make one of the desktop environments to work together with wi-fi.
Additional info:
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.15.33-1-lts(64-bit)
Graphics Platform: X11
Processors: 8xIntel@Core i5-9300H CPU @2.40GHz
Memory: 15.5 GiB of RAM
Last edited by kolupaev (2022-04-10 14:08:24)
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Which guide did you follow to install your system? This looks like it could be a hostname issue. Please post the output of each of the following once from when the wifi is not started and once from when it is:
cat /etc/hostname
hostnamectl
"UNIX is simple and coherent..." - Dennis Ritchie, "GNU's Not UNIX" - Richard Stallman
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When the wi-fi is on:
[kolupaev@archlinux ~]$ cat /etc/hostname
cat: /etc/hostname: No such file or directory
[kolupaev@archlinux ~]$ hostnamectl
Static hostname: n/a
Transient hostname: Kolupaev-Acer-Nitro5
Icon name: computer-laptop
Chassis: laptop ?
Machine ID: 0367ab45de9a4e97b4dc456f95464a0a
Boot ID: a958055221154384baaa542a4e5958de
Operating System: Arch Linux
Kernel: Linux 5.15.33-1-lts
Architecture: x86-64
Hardware Vendor: Acer
Hardware Model: Nitro AN515-54
When the wi-fi is out:
[kolupaev@archlinux ~]$ cat /etc/hostname
cat: /etc/hostname: No such file or directory
[kolupaev@archlinux ~]$ hostnamectl
Static hostname: n/a
Transient hostname: archlinux
Icon name: computer-laptop
Chassis: laptop ?
Machine ID: 0367ab45de9a4e97b4dc456f95464a0a
Boot ID: a958055221154384baaa542a4e5958de
Operating System: Arch Linux
Kernel: Linux 5.15.33-1-lts
Architecture: x86-64
Hardware Vendor: Acer
Hardware Model: Nitro AN515-54
I followed this video guide
Last edited by kolupaev (2022-04-10 13:55:31)
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Static hostname: n/a
And that's why stupid likeshareandsubscribe video guides aren't supported - they're stupid. likeshareandsubscribe.
Set your hostname, https://wiki.archlinux.org/title/Networ … e_hostname
And visit the only relevant installation guide to fix all the other errors you probably made following that video, https://wiki.archlinux.org/title/Installation_guide
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Thank you, that worked.
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*Sigh*, a two hour video to guide people through a ~10 minute process ... and it still gets important things wrong.
"UNIX is simple and coherent..." - Dennis Ritchie, "GNU's Not UNIX" - Richard Stallman
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