nixpkgs default python3 moved to 3.14, but tulir_telethon declares no
3.14 support, breaking evaluation.

The list_add corruption / lib/list_debug.c:32 freezes on WiFi roam were
an add-side race: generic mt76_sta_add() re-ran mt76_wcid_init() on a
wcid that mt7925_mac_sta_add had already published, letting the rx/txs
softirq link it into sta_poll_list right before the second
INIT_LIST_HEAD self-looped the node. Our local teardown-side patch
could not close that window (crashed again 2026-07-07, 4x in 11 min).

Upstream fix 20b126920a25 ("wifi: mt76: add wcid publish check in
mt76_sta_add") is in 7.1.3, which linuxPackages_latest now provides
after the nixpkgs bump. Keep kernel >= 7.1.3.

Six hard freezes on 2026-07-03, all during WiFi roaming between hoelle
APs. Captured oopses show identical list_add corruption in an 8k slab
(ieee80211_sta + drv_priv) -> kernel BUG at lib/list_debug.c:32 in
softirq context -> full system freeze.

Root cause: mt792x station teardown never clears wcid->sta, so the
rx/txs softirq path can re-add a dying wcid to sta_poll_list after
mt76_wcid_cleanup() unlinked it. Once the sta is freed and the slab
slot reused, mt76_wcid_init() self-loops the still-linked list node;
the next list_add_tail() panics. Also fixes the unlocked
list_first_entry read in mt7925_mac_sta_poll (mt7921 already takes
the lock there).

Full analysis in the patch header. Drop once fixed upstream
(https://github.com/zbowling/mt7925 tracks related work).

Also drop amdgpu.mes=0: the parameter no longer exists on 7.x
("amdgpu: unknown parameter mes ignored").

Replace the stock chime with the quack from
https://www.youtube.com/watch?v=Fw3RB7xnb80, trimmed to 0.2s and
attenuated to match the original's peak level.

Assisted-by: Claude Code (claude-fable-5)