On Sun, Oct 4, 2026 at 11:28 AM Thomas Tanghus <[email protected]> wrote: > > Hi, new here > > Until half a year ago I hadn't used debian for over 20 years. I was using > Kubuntu in the mean time. Then I installed Trixie, and today I upgraded to > testing to get a newer KDE Plasma. > It took a couple of hours on my old laptop. > The system seems to be running fine, but the wifi connection is *very* flaky. > It connects and disconnects constantly. > I know next to nothing about networking, so I have no idea how to find out > what's why. > > How do I find relevant info to debug this? > > This is the only have: > > lspci | grep -i network > 07:00.0 Network controller: Qualcomm Atheros QCA9565 / AR9565 Wireless > Network Adapter (rev 01) > > Both 'firmware-atheros' and 'firmware-misc-nonfree' are installed. > > And: > > When the connection is down: > ip a > 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 noprefixroute > valid_lft forever preferred_lft forever > 2: enp8s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state > DOWN group default qlen 1000 > link/ether 20:25:64:c3:4c:10 brd ff:ff:ff:ff:ff:ff > altname enx202564c34c10 > 3: wlp7s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state > DOWN group default qlen 1000 > link/ether a2:31:a2:ff:20:7c brd ff:ff:ff:ff:ff:ff permaddr > 28:e3:47:f1:f1:e0 > altname wlx28e347f1f1e0 > > > This when it's up: > > ip a > 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 noprefixroute > valid_lft forever preferred_lft forever > 2: enp8s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state > DOWN group default qlen 1000 > link/ether 20:25:64:c3:4c:10 brd ff:ff:ff:ff:ff:ff > altname enx202564c34c10 > 3: wlp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP > group default qlen 1000 > link/ether 28:e3:47:f1:f1:e0 brd ff:ff:ff:ff:ff:ff > altname wlx28e347f1f1e0 > inet 192.168.161.20/24 brd 192.168.161.255 scope global dynamic > noprefixroute wlp7s0 > valid_lft 3596sec preferred_lft 3596sec > inet6 fe80::efb5:5c99:7773:59f/64 scope link noprefixroute > valid_lft forever preferred_lft forever > > > sudo systemctl status NetworkManager > ● NetworkManager.service - Network Manager > Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled; > preset: enabled) > Active: active (running) since Sun 2026-10-04 14:55:44 CEST; 1h 22min ago > Invocation: b225c6ab95a04f0d92064651d731eadf > Docs: man:NetworkManager(8) > Main PID: 849 (NetworkManager) > Tasks: 4 (limit: 9206) > Memory: 10.3M (peak: 11M) > CPU: 24.034s > CGroup: /system.slice/NetworkManager.service > └─849 /usr/sbin/NetworkManager --no-daemon > > Oct 04 16:17:47 akd-laptop NetworkManager[849]: <info> [1791123467.9661] > dhcp4 (wlp7s0): activation: beginning tr> > Oct 04 16:17:47 akd-laptop NetworkManager[849]: <info> [1791123467.9914] > dhcp4 (wlp7s0): state changed new lease,> > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.1403] > dhcp4 (wlp7s0): state changed new lease,> > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.1421] > policy: set 'Tanghus mobil' (wlp7s0) as > > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.2935] > device (wlp7s0): state change: ip-config> > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.3317] > device (wlp7s0): state change: ip-check > > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.3325] > device (wlp7s0): state change: secondari> > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.3336] > manager: NetworkManager state is now CON> > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.3341] > device (wlp7s0): Activation: successful,> > Oct 04 16:17:48 akd-laptop NetworkManager[849]: <info> [1791123468.3349] > manager: NetworkManager state is now CON> > > I'm away from home so I use my phone as hotspot. It didn't give me any > problems before I updated.
I have one question and one suggestion. First, the question. What do your apt sources look like? Do you have the firmware repos enabled? That is, is non-free-firmware listed in both base and updates? Also see <https://wiki.debian.org/SourcesList>. Second, the suggestion. Is your machine's BIOS or UEFI up to date? If not, then you should update the BIOS or UEFI. Remember, BIOS and UEFI are just another buggy program that needs to be updated on occasion. There's nothing special about it. Jeff
