3 ms·

Thanks. I’ve had issues with T14s for a couple of gens where the machine wakes up during the closed lid and runs the battery down. I’ve tried the usual trouble

Thanks. I’ve had issues with T14s for a couple of gens where the machine wakes up during the closed lid and runs the battery down. I’ve tried the usual troubleshooting. This has been a non issue on Dell machines for almost 20 years.

colordrops 9mo ago
Oh some kernel params and other settings can help with that. These are mine, and it's been working great: Kernel params ## Seems to be needed for suspend to S0 (s2idle) without hanging (only needed on p16s) acpi_osi="Windows 2022" # Prevent spurious wakeups from a firmware bug where the EC or SMU generates spurious "heartbeat" interrupts during sleep acpi.ec_no_wakeup=1 # Prevents dock from waking up laptop right after suspend usbcore.autosuspend=-1 Other settings (executed with a systemd service) (also only needed on p16s, not on my p14s) # Disable Thunderbolt PCIe root port wakeup (RP09) echo disabled > /sys/devices/pci0000:00/0000:00:1d.0/power/wakeup || true # Disable USB XHCI controller wakeup echo disabled > /sys/devices/pci0000:00/0000:00:14.0/power/wakeup || true # Disable ACPI wakeup for XHCI and RP09 (toggle if enabled) grep -q "XHCI.*enabled" /proc/acpi/wakeup && echo XHCI > /proc/acpi/wakeup || true grep -q "RP09.*enabled" /proc/acpi/wakeup && echo RP09 > /proc/acpi/wakeup || true
cromka 9mo ago
That's possibly because they had S3 disabled and used 'modern standby': https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/modern-standby https://learn.microsoft.com/en-us/windows-hardware/design/de...
Grazester 9mo ago
Somewhat related yet not. I had a Dell laptop near kill itself waking up while in my backpack and near melting itself. I think I blame Windows update for this though. This resulted in the laptop not being able to power on most of the times after that.

colordrops 9mo ago

Oh some kernel params and other settings can help with that. These are mine, and it's been working great: Kernel params ## Seems to be needed for suspend to S0 (s2idle) without hanging (only needed on p16s) acpi_osi="Windows 2022" # Prevent spurious wakeups from a firmware bug where the EC or SMU generates spurious "heartbeat" interrupts during sleep acpi.ec_no_wakeup=1 # Prevents dock from waking up laptop right after suspend usbcore.autosuspend=-1 Other settings (executed with a systemd service) (also only needed on p16s, not on my p14s) # Disable Thunderbolt PCIe root port wakeup (RP09) echo disabled > /sys/devices/pci0000:00/0000:00:1d.0/power/wakeup || true # Disable USB XHCI controller wakeup echo disabled > /sys/devices/pci0000:00/0000:00:14.0/power/wakeup || true # Disable ACPI wakeup for XHCI and RP09 (toggle if enabled) grep -q "XHCI.*enabled" /proc/acpi/wakeup && echo XHCI > /proc/acpi/wakeup || true grep -q "RP09.*enabled" /proc/acpi/wakeup && echo RP09 > /proc/acpi/wakeup || true

cromka 9mo ago

That's possibly because they had S3 disabled and used 'modern standby': https://learn.microsoft.com/en-us/windows-hardware/design/device-experiences/modern-standby https://learn.microsoft.com/en-us/windows-hardware/design/de...

Grazester 9mo ago

Somewhat related yet not. I had a Dell laptop near kill itself waking up while in my backpack and near melting itself. I think I blame Windows update for this though. This resulted in the laptop not being able to power on most of the times after that.