check-psr.sh

#!/usr/bin/env bash
# check-psr.sh — is the Meteor Lake PSR suspend fix active?
# Verifies the kernel cmdline, live PSR state, and recent suspend cycles.
set -u

echo "== kernel cmdline =="
grep -o 'i915.enable_psr=[0-9]' /proc/cmdline || echo "  i915.enable_psr NOT set (default) — add i915.enable_psr=0"

echo "== live PSR state =="
found=0
for s in /sys/kernel/debug/dri/*/i915_edp_psr_status; do
    [ -r "$s" ] || continue
    found=1
    echo "  $s:"
    sudo cat "$s" | grep -iE 'PSR mode|Sink support' | sed 's/^/    /'
done
[ "$found" = 1 ] || echo "  no i915_edp_psr_status (need root / debugfs mounted)"

echo "== suspend cycles this boot =="
if journalctl -b | grep -qE 'PM: suspend entry'; then
    journalctl -b | grep -E 'PM: suspend (entry|exit)' | tail -4 | sed 's/^/  /'
else
    echo "  none this boot"
fi