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machines.coaxmetal: persistent bt-agent + evict stale BLE devices
Xbox pads pair via JustWorks; on reconnect a pad whose bond went stale
re-initiates pairing, which needs a registered agent to auto-confirm. bluetuith
only has an agent while actively pairing in it, so an autonomous re-pair hit
"No agent available for request type 2" and the link dropped right after
connecting. Run bt-agent -c NoInputNoOutput as a persistent default agent so
pairing/re-pairing always completes.
Also set TemporaryTimeout=30 so the LAN party's hundreds of stray BLE devices
are evicted from the cache instead of piling up and saturating the adapter.
author
lassulus
date
(Jul 25, 2026, 11:28 PM CEST)
commit
7698c37a
7698c37a0dcb24377d62afe6531b6744c3e87bc2
parent
00bd6000
00bd6000b01eb020a713fd273591e5b936b96ca6
+21
+21
machines/coaxmetal/strom.nix
+21
machines/coaxmetal/strom.nix
···
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# back on (otherwise bonded pads bond but never re-link). Fine on a
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# mains-powered kiosk.
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FastConnectable = true;
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# In this busy-RF LAN environment the cache fills with hundreds of stray
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# BLE devices; evict non-bonded ones ~30s after they leave range so they
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# do not pile up and saturate the adapter.
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TemporaryTimeout = 30;
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};
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+
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# Persistent JustWorks pairing agent. Xbox pads pair via JustWorks, and on
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# reconnect a pad whose bond went stale re-initiates pairing. bluez needs a
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# registered agent to auto-confirm that; bluetuith only provides one while you
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# are actively pairing in it, so an autonomous re-pair hits "No agent
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# available for request type 2" and the link drops. Keep a NoInputNoOutput
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# agent registered at all times so pairing/re-pairing just works.
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systemd.services.bt-agent = {
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wantedBy = [ "multi-user.target" ];
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after = [ "bluetooth.service" ];
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requires = [ "bluetooth.service" ];
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serviceConfig = {
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ExecStart = "${pkgs.bluez-tools}/bin/bt-agent -c NoInputNoOutput";
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Restart = "always";
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RestartSec = 2;
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};
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};
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}