Blog
Wi‑Fi associated, no address: Offer must not ride multicast
On the NUC, iwl8265 reached wpa2=ok — assoc and handshake looked fine — but DHCP stayed no offer. Tray said up, address stayed 0.0.0.0. Class goal: home WPA2 → lease → ping gateway. Stuck at associ...
Why KernelEnter→iretq blew up with #UD
I wanted kernel tasks to run with IF=1 by switching KernelEnter from a jump to iretq. On the NUC that meant sticky window drags, store remove hangs, #UD/#PF, and sometimes a full Reset. Goal clear;...
Flush OK, real TX still dead — eleven knives on I219
On the NUC, I219 bound and link was up — lsdev showed i219 net link=up. ping still stuck: descriptors queued, hardware never completed — TDT moved, TDH did not, last_rc=-3. Class path: NIC visible,...
Welcome to Teacher Tan's blog — I like to tinker
Back in college I already liked to tinker — installing every Windows from XP through Vista, then 7, 8/8.1, 10, 11, plus Ubuntu, Manjaro, OpenSUSE, and more.