Bound the hybrid GPU gate's supergfxctl query (#6799)

omarchy-hw-hybrid-gpu gates the Hybrid GPU menu entry, and it queried
supergfxctl unbounded — a wedged supergfxd stalled menu rendering
forever. Bound the query with the same TERM-then-KILL escalation the
toggle uses, and treat a daemon that cannot answer like a machine
without supergfxctl: fall back to counting GPUs rather than hiding
hardware that is really there. An ordinary supergfxctl failure still
hides the entry.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

bin/omarchy-hw-hybrid-gpu

@@ -2,8 +2,23 @@
 
 # omarchy:summary=Detect whether the system has an active hybrid GPU configuration
 
-if omarchy-cmd-present supergfxctl; then
-  supergfxctl -s 2>/dev/null | grep -qw Hybrid
-else
+multiple_gpus() {
   (($(lspci | grep -cE 'VGA|3D|Display') >= 2))
+}
+
+if omarchy-cmd-present supergfxctl; then
+  # A wedged supergfxd blocks its clients forever, and this gate runs while
+  # the menu renders. Bound the query, and treat a daemon that cannot answer
+  # like a machine without supergfxctl: count GPUs instead of hiding hardware
+  # that is really there.
+  modes=$(timeout --kill-after=1s 1s supergfxctl -s 2>/dev/null)
+  status=$?
+
+  if ((status == 124 || status == 137)); then
+    multiple_gpus
+  else
+    grep -qw Hybrid <<<"$modes"
+  fi
+else
+  multiple_gpus
 fi

test/shell.d/hw-hybrid-gpu-test.sh

@@ -0,0 +1,91 @@
+#!/bin/bash
+
+source "$(dirname "$0")/base-test.sh"
+
+test_tmp=$(mktemp -d) || fail "test temp directory is available"
+trap 'rm -rf "$test_tmp"' EXIT
+
+fake_bin="$test_tmp/bin"
+mkdir -p "$fake_bin"
+
+cat >"$fake_bin/supergfxctl" <<'STUB'
+#!/bin/bash
+
+[[ $1 == "-s" ]] || exit 64
+
+case "${BLOCKED:-no}" in
+kill-only)
+  trap '' TERM
+  /usr/bin/sleep 30
+  ;;
+term)
+  /usr/bin/sleep 30
+  ;;
+esac
+
+((${FAIL_STATUS:-0})) && exit "$FAIL_STATUS"
+
+printf '%s\n' "${SUPPORTED_MODES:-Integrated Hybrid}"
+STUB
+
+cat >"$fake_bin/lspci" <<'STUB'
+#!/bin/bash
+
+for _ in $(seq "${GPU_COUNT:-1}"); do
+  echo "0000:00:02.0 VGA compatible controller: Stub GPU"
+done
+STUB
+
+chmod +x "$fake_bin"/*
+
+hybrid_gpu() {
+  PATH="$fake_bin:$PATH" timeout --kill-after=1s 10s bash "$ROOT/bin/omarchy-hw-hybrid-gpu"
+}
+
+hybrid_gpu ||
+  fail "hybrid GPU detection sees a supported Hybrid mode"
+pass "hybrid GPU detection sees a supported Hybrid mode"
+
+SUPPORTED_MODES="Integrated Vfio" hybrid_gpu
+status=$?
+((status == 1)) ||
+  fail "hybrid GPU detection trusts supergfxctl when Hybrid is unsupported" "exit status: $status"
+pass "hybrid GPU detection trusts supergfxctl when Hybrid is unsupported"
+
+FAIL_STATUS=2 GPU_COUNT=2 hybrid_gpu
+status=$?
+((status == 1)) ||
+  fail "hybrid GPU detection hides on an ordinary supergfxctl failure" "exit status: $status"
+pass "hybrid GPU detection hides on an ordinary supergfxctl failure"
+
+BLOCKED=term GPU_COUNT=1 hybrid_gpu
+status=$?
+((status == 1)) ||
+  fail "hybrid GPU detection sees one GPU as non-hybrid after a clean timeout" "exit status: $status"
+pass "hybrid GPU detection sees one GPU as non-hybrid after a clean timeout"
+
+BLOCKED=term GPU_COUNT=2 hybrid_gpu ||
+  fail "hybrid GPU detection counts multiple GPUs after a clean timeout"
+pass "hybrid GPU detection counts multiple GPUs after a clean timeout"
+
+BLOCKED=kill-only GPU_COUNT=1 hybrid_gpu
+status=$?
+((status != 124 && status != 137)) ||
+  fail "hybrid GPU detection stays bounded when supergfxd ignores the timeout signal"
+((status == 1)) ||
+  fail "hybrid GPU detection sees one GPU as non-hybrid when supergfxd is wedged" "exit status: $status"
+pass "hybrid GPU detection stays bounded when supergfxd ignores the timeout signal"
+
+BLOCKED=kill-only GPU_COUNT=2 hybrid_gpu ||
+  fail "hybrid GPU detection counts multiple GPUs when supergfxd is wedged"
+pass "hybrid GPU detection counts multiple GPUs when supergfxd is wedged"
+
+cat >"$fake_bin/omarchy-cmd-present" <<'STUB'
+#!/bin/bash
+exit 1
+STUB
+chmod +x "$fake_bin/omarchy-cmd-present"
+
+GPU_COUNT=2 hybrid_gpu ||
+  fail "hybrid GPU detection counts GPUs without supergfxctl"
+pass "hybrid GPU detection counts GPUs without supergfxctl"