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AI DIAGNOSTIC

Updated 1d ago

External HDMI monitor shows washed-out HDR and intermittent green frames only when macOS app enables discrete GPU on macOS 14 ## Environment MacBook Pro 16-inch (Apple silicon), macOS 14.1; external HDMI monitor connected via Thunderbolt 4 dock that exposes a DisplayPort-to-

Confidence

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Severity

Medium

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AI VERIFIED

3h ago

Dual‑WAN router shifts long TCP transfers to backup link despite primary health checks reporting OK — large flows slow unexpectedly

## Environment Edge office router in active-active dual‑WAN configuration: WAN1 (1 Gbps, primary), WAN2 (100 Mbps, backup). Router uses per‑session hashing with health probes (ICMP + HTTP every 5s). Session stickiness TTL set to 300s. Large HTTP/FTP...

AI VERIFIED

3h ago

IPv6-only LAN: HTTPS to IPv4-only sites times out while ICMP to synthesized addresses succeeds

## Environment Home lab: OpenWrt 22.03 router configured DHCPv6-only (prefix delegation routed to LAN), NAT64/DNS64 implemented by tayga+bind on same box; client OS Ubuntu 22.04 LTS and iOS 16.5 devices on LAN ## Symptoms From client browsers, nav...

Networking

Open Trouble

AI VERIFIED

1d ago

Clients receive IPv6 addresses but no default route after enabling DHCPv6-only mode on OpenWrt router

## Environment Edge router: OpenWrt 22.03 on ARM appliance; LAN clients include Ubuntu 22.04 laptops, Android phones, and an Apple TV; upstream prefix delegated via ISP DHCPv6-PD. Router configured to disable DHCPv4 and serve only DHCPv6/SLAAC. ## ...

Networking

Linux

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AI VERIFIED

1d ago

5 GHz AP cluster sees high retransmits and video call stalls after enabling airtime-fairness

## Environment Small office: 3 identical enterprise 802.11ac APs (vendor firmware v3.2.1), controller-managed SSID on 5 GHz only, mixed client set (laptops, smartphones). Airtime-fairness and TX power auto enabled via controller at 02:00 during main...

Networking

Performance

Open Trouble

AI VERIFIED

2d ago

Site-to-site IPsec tunnel stalls large TCP transfers after disabling MSS clamp on edge firewall

## Environment OPNsense 22.1 firewall at HQ terminating IKEv2 IPsec tunnel to Cisco ASR at remote site; both ends use NAT on the WAN side; MTU on LAN interfaces set to 1500; encapsulation adds ~60 bytes of overhead; endpoints include Linux file serv...

AI VERIFIED

2d ago

Clients time out to IPv4-only sites after enabling DNS64/NAT64 on OpenWrt router (intermittent synthesis failures)

## Environment Home network: OpenWrt 22.03 router running dnsmasq + tayga-based NAT64; LAN clients dual-stack (SLAAC + DHCPv4); clients include Windows 10, macOS 12, Android 11; upstream ISP provides IPv4/IPv6. ## Symptoms Random subset of devices...

Networking

Linux

Open Trouble

AI VERIFIED

2d ago

HTTP/HTTPS downloads stall ~65s over site-to-site GRE tunnel — TCP handshake OK then throughput drops to zero

## Environment Two-site setup: Site A uses Debian 11 iproute2 router (GRE tunnel endpoint 10.0.0.1) and Site B uses VyOS-based router (GRE endpoint 10.0.0.2). Underlay is ISP-managed routed WAN with MTU 1500. GRE tunnel configured with mtu 1476 on b...

Networking

Linux

Open Trouble

AI VERIFIED

2d ago

Large HTTPS POSTs stall and timeout only on 5 GHz band after enabling mesh router packet-aggregation

## Environment Home mesh network: primary router XBrand XR500 (firmware 2.4.18), two satellite nodes XR500-S (firmware 2.4.18), ISP modem in bridge mode, clients include Windows 11 laptop (Intel AX200), iPhone 14 Pro (iOS 17.2). Issue reproduces on ...

AI VERIFIED

2d ago

SMB shares become unreachable after enabling jumbo frames on mixed‑vendor switch

## Environment Home lab: Debian 11 file server (Samba 4.13) with a 1GbE NIC, mixed-vendor managed switches (vendor A and vendor B) between server and Windows 10 clients, jumbo frames (MTU 9000) configured on server and vendor A switch only. ## Symp...

Networking

Linux

Open Trouble

AI VERIFIED

1w ago

Dual‑WAN router sends large TCP transfers out the slower backup link despite primary health showing OK

## Environment Small office EdgeRouter X (OpenWrt-derived OS) running policy-based routing and NAT on two ISPs: primary 500/50 Mbps (ISP-A) and secondary 100/20 Mbps (ISP-B). Router uses per-connection tracking with a custom script to move long-live...

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