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This commit is contained in:
Sridhar Ratnakumar 2026-06-06 09:39:49 -04:00
parent 66cc63d988
commit 43521a183f
3 changed files with 31 additions and 4 deletions
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19
configurations/nixos/pureintent/configuration.nix
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@ -28,18 +28,29 @@
# Enable networking
networking.networkmanager.enable = true;
# Wired (enp1s0) and Wi-Fi (drapeau/wlp2s0) are on the same LAN. Letting both
# Wired (enp1s0) and Wi-Fi (wlp2s0) are on the same LAN. Letting both
# autoconnect causes ARP flux: the gateway's neighbor entry for our IP flips
# between the two NIC MACs and the Ethernet path goes silently dead.
# See docs/LINUX-INTERNET-ISSUES.md.
systemd.services.nm-drapeau-noautoconnect = {
description = "Disable autoconnect on drapeau Wi-Fi profile";
#
# Disable autoconnect on *every* saved Wi-Fi profile (not a single hardcoded
# SSID) so a newly-joined network can't slip past and bring Wi-Fi up beside
# Ethernet. Wi-Fi stays usable on demand via `nmcli connection up <name>`.
systemd.services.nm-wifi-noautoconnect = {
description = "Disable autoconnect on all Wi-Fi profiles (avoid dual-NIC ARP flux)";
after = [ "NetworkManager.service" ];
wants = [ "NetworkManager.service" ];
wantedBy = [ "multi-user.target" ];
serviceConfig.Type = "oneshot";
script = ''
${pkgs.networkmanager}/bin/nmcli connection modify drapeau connection.autoconnect no || true
nmcli=${pkgs.networkmanager}/bin/nmcli
"$nmcli" -t -f TYPE,NAME connection show | while IFS=: read -r type name; do
if [ "$type" = "802-11-wireless" ]; then
"$nmcli" connection modify "$name" connection.autoconnect no || true
fi
done
# Drop any Wi-Fi link that already came up, so the fix applies without a reboot.
"$nmcli" device disconnect wlp2s0 || true
'';
};