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machines.xerxes: add some suspend workarounds
author
lassulus
date
(Apr 4, 2026, 2:07 PM CEST)
commit
48bc6cdf
48bc6cdf220d4d309f0e6b128cb94ca20ab91950
parent
fd61b6ca
fd61b6ca27b5cca919eac0726b69a68ae1fb81f8
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machines/xerxes/physical.nix
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machines/xerxes/physical.nix
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options amdgpu ip_block_mask=0xfffff7ff
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'';
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-
# Disable spurious wakeup sources (PCIe ports triggering immediate wake from s2idle)
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# Disable spurious wakeup sources that trigger immediate wake from s2idle
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# - PCIe ports
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# - USB host controllers (xhci_hcd) — external USB devices cause instant wakeup
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# - Thunderbolt controllers
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# - I2C touchpad/touchscreen (HTIX5288 via pinctrl_amd GPIO)
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services.udev.extraRules = ''
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ACTION=="add", SUBSYSTEM=="pci", DRIVER=="pcieport", ATTR{power/wakeup}="disabled"
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ACTION=="add", SUBSYSTEM=="pci", DRIVER=="xhci_hcd", ATTR{power/wakeup}="disabled"
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ACTION=="add", SUBSYSTEM=="pci", DRIVER=="thunderbolt", ATTR{power/wakeup}="disabled"
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ACTION=="add", SUBSYSTEM=="i2c", ATTR{name}=="HTIX5288*", ATTR{power/wakeup}="disabled"
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ACTION=="add", SUBSYSTEM=="serio", DRIVER=="atkbd", ATTR{power/wakeup}="disabled"
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'';
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# Disable ACPI wakeup on USB/Thunderbolt controllers to prevent spurious wakeups
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# (udev rules handle sysfs wakeup, this handles /proc/acpi/wakeup separately)
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systemd.services.disable-acpi-wakeup = {
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description = "Disable USB/Thunderbolt ACPI wakeup sources";
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wantedBy = [ "multi-user.target" ];
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after = [ "systemd-udev-settle.service" ];
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serviceConfig = {
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Type = "oneshot";
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RemainAfterExit = true;
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ExecStart = pkgs.writeShellScript "disable-acpi-wakeup" ''
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for dev in XHC0 XHC1 XHC3 XHC4 NHI0 NHI1; do
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if grep -q "^$dev.*enabled" /proc/acpi/wakeup; then
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echo "$dev" > /proc/acpi/wakeup
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fi
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done
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'';
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};
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};
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# Swapfile for hibernation (suspend-then-hibernate needs somewhere to dump RAM)
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swapDevices = [
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ExecStart = "${pkgs.bash}/bin/bash -c 'for f in /sys/kernel/debug/dri/*/amdgpu_evict_vram; do cat \"$f\"; done'";
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};
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};
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# Unbind USB4/Thunderbolt controllers before sleep to allow s0ix deepest state
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# AMD USB4 controllers stay active during s2idle and block entry into deepest sleep
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# XHCI (USB3) controllers are left bound to avoid disconnecting gamepad/keyboard/mouse
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environment.etc."systemd/system-sleep/usb4-sleep".source = pkgs.writeShellScript "usb4-sleep" ''
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case "$1" in
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pre)
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for dev in 0000:c6:00.5 0000:c6:00.6; do
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if [ -e /sys/bus/pci/drivers/thunderbolt/$dev ]; then
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echo $dev > /sys/bus/pci/drivers/thunderbolt/unbind || true
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fi
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done
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;;
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post)
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for dev in 0000:c6:00.5 0000:c6:00.6; do
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if [ ! -e /sys/bus/pci/drivers/thunderbolt/$dev ]; then
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echo $dev > /sys/bus/pci/drivers/thunderbolt/bind || true
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fi
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done
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;;
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esac
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'';
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# s2idle for 15 minutes, then hibernate to save power
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services.logind.powerKey = "suspend-then-hibernate";