changing wifi network on minimal debian install

[rrekaf]

I have a minimal debian install with i3 on my laptop and i want to choose which wifi i am connected to. I ideally would like to have a gui for it.

What i tried:
- Changing the /etc/network/interfaces file to include ssid in psk of another wifi but the wifi just never connected.
- Installing NetworkManager nm-applet nm-tui, with nm-tui i can edit wifi settings but the wifi just doesnt connect, the system tray icon of nm-applet used to say wifi device not managed but after i did systemctl unmask wpa_supplicant now it says wifi device not ready. Here is the log of systemctl status NetworkManager:

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Mar 11 20:35:38 gengar NetworkManager[713]: <warn>  [1710185738.6110] device (wlp3s0): re-acquiring supplicant interface (#2).
Mar 11 20:35:38 gengar NetworkManager[713]: <error> [1710185738.6741] device (wlp3s0): Couldn't initialize supplicant interface: GDBus.Error:fi.w1.wpa_supplicant1.UnknownError: wpa_supplicant couldn't grab this interface.
Mar 11 20:35:48 gengar NetworkManager[713]: <warn>  [1710185748.6126] device (wlp3s0): re-acquiring supplicant interface (#3).
Mar 11 20:35:48 gengar NetworkManager[713]: <error> [1710185748.7067] device (wlp3s0): Couldn't initialize supplicant interface: GDBus.Error:fi.w1.wpa_supplicant1.UnknownError: wpa_supplicant couldn't grab this interface.
Mar 11 20:35:58 gengar NetworkManager[713]: <warn>  [1710185758.6123] device (wlp3s0): re-acquiring supplicant interface (#4).
Mar 11 20:35:58 gengar NetworkManager[713]: <error> [1710185758.6981] device (wlp3s0): Couldn't initialize supplicant interface: GDBus.Error:fi.w1.wpa_supplicant1.UnknownError: wpa_supplicant couldn't grab this interface.
Mar 11 20:36:01 gengar NetworkManager[713]: <info>  [1710185761.1262] agent-manager: agent[eeead7ef357c23bb,:1.38/org.freedesktop.nm-applet/1000]: agent registered
Mar 11 20:36:08 gengar NetworkManager[713]: <warn>  [1710185768.6121] device (wlp3s0): re-acquiring supplicant interface (#5).
Mar 11 20:36:08 gengar NetworkManager[713]: <error> [1710185768.6979] device (wlp3s0): Couldn't initialize supplicant interface: GDBus.Error:fi.w1.wpa_supplicant1.UnknownError: wpa_supplicant couldn't grab this interface.
Mar 11 20:36:08 gengar NetworkManager[713]: <info>  [1710185768.6980] device (wlp3s0): supplicant interface keeps failing, giving up

And here is the output of systemctl status wpa_supplicant

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Mar 11 20:36:08 gengar wpa_supplicant[714]: nl80211: kernel reports: Match already configured
Mar 11 20:36:08 gengar wpa_supplicant[714]: nl80211: kernel reports: Match already configured
Mar 11 20:36:08 gengar wpa_supplicant[714]: nl80211: kernel reports: Match already configured
Mar 11 20:36:08 gengar wpa_supplicant[714]: nl80211: kernel reports: Match already configured
Mar 11 20:36:08 gengar wpa_supplicant[714]: ctrl_iface exists and seems to be in use - cannot override it
Mar 11 20:36:08 gengar wpa_supplicant[714]: Delete '/run/wpa_supplicant/wlp3s0' manually if it is not used anymore
Mar 11 20:36:08 gengar wpa_supplicant[714]: Failed to initialize control interface 'DIR=/run/wpa_supplicant GROUP=netdev'.
                                            You may have another wpa_supplicant process already running or the file was
                                            left by an unclean termination of wpa_supplicant in which case you will need
                                            to manually remove this file before starting wpa_supplicant again.
Mar 11 20:36:08 gengar wpa_supplicant[714]: wlp3s0: CTRL-EVENT-DSCP-POLICY clear_all
Mar 11 20:36:08 gengar wpa_supplicant[714]: wlp3s0: CTRL-EVENT-DSCP-POLICY clear_all
Mar 11 20:36:08 gengar wpa_supplicant[714]: nl80211: deinit ifname=wlp3s0 disabled_11b_rates=0

I wanted to make a copy of the wlp3s0 file in case deleting it causes more problems but then:

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# cp wlp3s0 /home/patryk/
cp: cannot open 'wlp3s0' for reading: No such device or address

So i decided to ask here first since i really dont want to go through installing and configuring everything in case it causes more problems i dont know how to fix and have to reinstall.

Thanks in advance any help is appreciated.

[fabien]

Hello rrekaf, welcome to the forums!

Could you please post the output of

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$> cat /etc/network/interfaces{,.d/*}