ERROR: systemd-udevd[1278]: Process '/usr/bin/tlp auto' failed with exit code 4.

[halocaridina]

Hi linrunner,

Just started noticing the above error in my journal upon changes in power state. First instance is unplugging AC, second is returning to AC a few seconds later:

Sep 02 16:44:00 wopr systemd-udevd[1278]: Process '/usr/bin/tlp auto' failed with exit code 4.
Sep 02 16:44:08 wopr systemd-udevd[1378]: Process '/usr/bin/tlp auto' failed with exit code 4.

For diagnositics, output of "tlp stat" on AC on update-to-date Arch laptop is:

--- TLP 0.9 --------------------------------------------

+++ Configured Settings: /etc/default/tlp
TLP_ENABLE=1
TLP_DEFAULT_MODE=AC
DISK_IDLE_SECS_ON_AC=0
DISK_IDLE_SECS_ON_BAT=2
MAX_LOST_WORK_SECS_ON_AC=15
MAX_LOST_WORK_SECS_ON_BAT=60
CPU_SCALING_GOVERNOR_ON_AC=performance
CPU_SCALING_GOVERNOR_ON_BAT=powersave
CPU_MIN_PERF_ON_AC=0
CPU_MAX_PERF_ON_AC=100
CPU_MIN_PERF_ON_BAT=0
CPU_MAX_PERF_ON_BAT=50
CPU_BOOST_ON_AC=1
CPU_BOOST_ON_BAT=1
SCHED_POWERSAVE_ON_AC=0
SCHED_POWERSAVE_ON_BAT=1
NMI_WATCHDOG=0
ENERGY_PERF_POLICY_ON_AC=performance
ENERGY_PERF_POLICY_ON_BAT=powersave
DISK_DEVICES="ata-TOSHIBA_THNSNJ256GCSU_552S1043TB4W ata-Crucial_CT250MX200SSD6_162112C6D4EF"
DISK_APM_LEVEL_ON_AC="255 255"
DISK_APM_LEVEL_ON_BAT="255 255"
SATA_LINKPWR_ON_AC=max_performance
SATA_LINKPWR_ON_BAT=min_power
AHCI_RUNTIME_PM_TIMEOUT=15
PCIE_ASPM_ON_AC=performance
PCIE_ASPM_ON_BAT=powersave
RADEON_POWER_PROFILE_ON_AC=high
RADEON_POWER_PROFILE_ON_BAT=low
RADEON_DPM_STATE_ON_AC=performance
RADEON_DPM_STATE_ON_BAT=battery
RADEON_DPM_PERF_LEVEL_ON_AC=auto
RADEON_DPM_PERF_LEVEL_ON_BAT=auto
WIFI_PWR_ON_AC=off
WIFI_PWR_ON_BAT=on
WOL_DISABLE=Y
SOUND_POWER_SAVE_ON_AC=0
SOUND_POWER_SAVE_ON_BAT=1
SOUND_POWER_SAVE_CONTROLLER=Y
BAY_POWEROFF_ON_BAT=0
BAY_DEVICE="sr0"
RUNTIME_PM_ON_AC=on
RUNTIME_PM_ON_BAT=auto
RUNTIME_PM_ALL=1
RUNTIME_PM_DRIVER_BLACKLIST="radeon nouveau"
USB_AUTOSUSPEND=1
USB_BLACKLIST_WWAN=1
USB_AUTOSUSPEND_DISABLE_ON_SHUTDOWN=1
RESTORE_DEVICE_STATE_ON_STARTUP=0
DEVICES_TO_DISABLE_ON_LAN_CONNECT="wifi"
DEVICES_TO_ENABLE_ON_LAN_DISCONNECT="wifi"

+++ System Info
System = Dell Inc. Latitude 3150
BIOS = A05
Release = "Arch Linux"
Kernel = 4.7.2-2-ck #1 SMP PREEMPT Fri Sep 2 13:44:48 EDT 2016 x86_64
/proc/cmdline = initrd=\intel-ucode.img initrd=\initramfs-linux-ck.img root=PARTUUID=c47b0f9f-23fd-47bc-ada2-7aaca8ef916e pcie_aspm=force acpi_osi=Linux acpi_osi='!Windows 2012' resume=PARTUUID=c47b0f9f-23fd-47bc-ada2-7aaca8ef916e resume_offset=51200 ipv6.disable_ipv6=1 rw ####usbcore.autosuspend=15 rw
Init system = systemd
Boot mode = UEFI

+++ TLP Status
State = enabled
Last run = 04:44:08 PM, 825 sec(s) ago
Mode = AC
Power source = AC

+++ Processor
CPU model = Intel(R) Pentium(R) CPU N3540 @ 2.16GHz

/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor = performance
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/cpu1/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor = performance
/sys/devices/system/cpu/cpu1/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/cpu2/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu2/cpufreq/scaling_governor = performance
/sys/devices/system/cpu/cpu2/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/cpu3/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu3/cpufreq/scaling_governor = performance
/sys/devices/system/cpu/cpu3/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/intel_pstate/min_perf_pct = 0
/sys/devices/system/cpu/intel_pstate/max_perf_pct = 100
/sys/devices/system/cpu/intel_pstate/no_turbo = 0
/sys/devices/system/cpu/intel_pstate/turbo_pct = 23
/sys/devices/system/cpu/intel_pstate/num_pstates = 27

x86_energy_perf_policy.cpu0 = performance
x86_energy_perf_policy.cpu1 = performance
x86_energy_perf_policy.cpu2 = performance
x86_energy_perf_policy.cpu3 = performance

/proc/sys/kernel/nmi_watchdog = 0

+++ Undervolting
PHC kernel not available.

+++ Temperatures
CPU temp = 56 [°C]
Fan speed = (not available)

+++ File System
/proc/sys/vm/laptop_mode = 0
/proc/sys/vm/dirty_writeback_centisecs = 1500
/proc/sys/vm/dirty_expire_centisecs = 1500
/proc/sys/vm/dirty_ratio = 20
/proc/sys/vm/dirty_background_ratio = 10
/proc/sys/fs/xfs/age_buffer_centisecs = (not available)
/proc/sys/fs/xfs/xfssyncd_centisecs = (not available)
/proc/sys/fs/xfs/xfsbufd_centisecs = (not available)

+++ Storage Devices
/dev/sda:
Disk ID = ata-TOSHIBA_THNSNJ256GCSU_552S1043TB4W
Model = TOSHIBA THNSNJ256GCSU
Firmware = JURA0101
APM Level = none/disabled
Status = active/idle
TRIM = supported
Scheduler = cfq

Runtime PM: control = on, autosuspend_delay = -1

SMART info:
5 Reallocated_Sector_Ct = 0
9 Power_On_Hours = 1479 [h]
12 Power_Cycle_Count = 855
194 Temperature_Celsius = 35 (Min/Max 17/40) [°C]

/dev/sdb:
Disk ID = ata-Crucial_CT250MX200SSD6_162112C6D4EF
Model = Crucial_CT250MX200SSD6
Firmware = MU03
APM Level = none/disabled
Status = active/idle
TRIM = supported
Scheduler = cfq

Runtime PM: control = on, autosuspend_delay = -1

SMART info:
9 Power_On_Hours = 178 [h]
12 Power_Cycle_Count = 138
194 Temperature_Celsius = 51 (Min/Max 26/55) [°C]

+++ SATA Aggressive Link Power Management
/sys/class/scsi_host/host0/link_power_management_policy = max_performance
/sys/class/scsi_host/host1/link_power_management_policy = max_performance

+++ AHCI Host Controller Runtime Power Management
/sys/bus/pci/devices/0000:00:13.0/ata1/power/control = on
/sys/bus/pci/devices/0000:00:13.0/ata2/power/control = on

+++ PCIe Active State Power Management
/sys/module/pcie_aspm/parameters/policy = performance

+++ Intel Graphics
/sys/module/i915/parameters/powersave = (not available)
/sys/module/i915/parameters/enable_rc6 = 1 (enabled)
/sys/module/i915/parameters/enable_dc = -1 (use per-chip default)
/sys/module/i915/parameters/enable_fbc = -1 (use per-chip default)
/sys/module/i915/parameters/enable_psr = 0 (disabled)
/sys/module/i915/parameters/lvds_downclock = (not available)
/sys/module/i915/parameters/modeset = -1 (use per-chip default)
/sys/module/i915/parameters/semaphores = -1 (use per-chip default)

+++ Wireless
bluetooth = on
wifi = on
wwan = none (no device)

hci0(btusb) : bluetooth, not connected
wlp3s0(iwlwifi) : wifi, connected, power management = off

+++ Audio
/sys/module/snd_hda_intel/parameters/power_save = 0
/sys/module/snd_hda_intel/parameters/power_save_controller = N

+++ Runtime Power Management
Device classes = all
Device blacklist = (not configured)
Driver blacklist = radeon nouveau

/sys/bus/pci/devices/0000:00:00.0/power/control = on (0x060000, Host bridge, iosf_mbi_pci)
/sys/bus/pci/devices/0000:00:02.0/power/control = on (0x030000, VGA compatible controller, i915)
/sys/bus/pci/devices/0000:00:13.0/power/control = on (0x010601, SATA controller, ahci)
/sys/bus/pci/devices/0000:00:14.0/power/control = on (0x0c0330, USB controller, xhci_hcd)
/sys/bus/pci/devices/0000:00:1a.0/power/control = on (0x108000, Encryption controller, mei_txe)
/sys/bus/pci/devices/0000:00:1b.0/power/control = on (0x040300, Audio device, snd_hda_intel)
/sys/bus/pci/devices/0000:00:1c.0/power/control = on (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1c.1/power/control = on (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1c.2/power/control = on (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1c.3/power/control = on (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1f.0/power/control = on (0x060100, ISA bridge, lpc_ich)
/sys/bus/pci/devices/0000:00:1f.3/power/control = on (0x0c0500, SMBus, i801_smbus)
/sys/bus/pci/devices/0000:02:00.0/power/control = on (0x080501, SD Host controller, sdhci-pci)
/sys/bus/pci/devices/0000:03:00.0/power/control = on (0x028000, Network controller, iwlwifi)
/sys/bus/pci/devices/0000:04:00.0/power/control = on (0x020000, Ethernet controller, r8169)

+++ USB
Autosuspend = enabled
Device whitelist = (not configured)
Device blacklist = (not configured)
WWAN blacklist = enabled

Bus 002 Device 001 ID 1d6b:0003 control = auto, autosuspend_delay_ms = 0 -- Linux Foundation 3.0 root hub (hub)
Bus 001 Device 004 ID 1bcf:28ae control = auto, autosuspend_delay_ms = 2000 -- Sunplus Innovation Technology Inc. Laptop Integrated Webcam HD (uvcvideo)
Bus 001 Device 003 ID 8087:0a2a control = auto, autosuspend_delay_ms = 2000 -- Intel Corp. (btusb)
Bus 001 Device 002 ID 1050:0407 control = on, autosuspend_delay_ms = 2000 -- Yubico.com Yubikey 4 OTP+U2F+CCID (usbhid, usbfs)
Bus 001 Device 001 ID 1d6b:0002 control = auto, autosuspend_delay_ms = 0 -- Linux Foundation 2.0 root hub (hub)

+++ Battery Status
/sys/class/power_supply/BAT0/manufacturer = Samsung SDI
/sys/class/power_supply/BAT0/model_name = DELL R5MD0D9
/sys/class/power_supply/BAT0/cycle_count = (not supported)
/sys/class/power_supply/BAT0/charge_full_design = 3400 [mAh]
/sys/class/power_supply/BAT0/charge_full = 3400 [mAh]
/sys/class/power_supply/BAT0/charge_now = 3400 [mAh]
/sys/class/power_supply/BAT0/current_now = 1 [mA]
/sys/class/power_supply/BAT0/status = Full

Charge = 100.0 [%]
Capacity = 100.0 [%]

+++ Battery Status
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/manufacturer = (not available)
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/model_name = Bluetooth Mouse M557
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/cycle_count = (not supported)
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/status = Discharging

Charge = 100.0 [%]
Capacity = 100.0 [%]

On battery:

--- TLP 0.9 --------------------------------------------

+++ Configured Settings: /etc/default/tlp
TLP_ENABLE=1
TLP_DEFAULT_MODE=AC
DISK_IDLE_SECS_ON_AC=0
DISK_IDLE_SECS_ON_BAT=2
MAX_LOST_WORK_SECS_ON_AC=15
MAX_LOST_WORK_SECS_ON_BAT=60
CPU_SCALING_GOVERNOR_ON_AC=performance
CPU_SCALING_GOVERNOR_ON_BAT=powersave
CPU_MIN_PERF_ON_AC=0
CPU_MAX_PERF_ON_AC=100
CPU_MIN_PERF_ON_BAT=0
CPU_MAX_PERF_ON_BAT=50
CPU_BOOST_ON_AC=1
CPU_BOOST_ON_BAT=1
SCHED_POWERSAVE_ON_AC=0
SCHED_POWERSAVE_ON_BAT=1
NMI_WATCHDOG=0
ENERGY_PERF_POLICY_ON_AC=performance
ENERGY_PERF_POLICY_ON_BAT=powersave
DISK_DEVICES="ata-TOSHIBA_THNSNJ256GCSU_552S1043TB4W ata-Crucial_CT250MX200SSD6_162112C6D4EF"
DISK_APM_LEVEL_ON_AC="255 255"
DISK_APM_LEVEL_ON_BAT="255 255"
SATA_LINKPWR_ON_AC=max_performance
SATA_LINKPWR_ON_BAT=min_power
AHCI_RUNTIME_PM_TIMEOUT=15
PCIE_ASPM_ON_AC=performance
PCIE_ASPM_ON_BAT=powersave
RADEON_POWER_PROFILE_ON_AC=high
RADEON_POWER_PROFILE_ON_BAT=low
RADEON_DPM_STATE_ON_AC=performance
RADEON_DPM_STATE_ON_BAT=battery
RADEON_DPM_PERF_LEVEL_ON_AC=auto
RADEON_DPM_PERF_LEVEL_ON_BAT=auto
WIFI_PWR_ON_AC=off
WIFI_PWR_ON_BAT=on
WOL_DISABLE=Y
SOUND_POWER_SAVE_ON_AC=0
SOUND_POWER_SAVE_ON_BAT=1
SOUND_POWER_SAVE_CONTROLLER=Y
BAY_POWEROFF_ON_BAT=0
BAY_DEVICE="sr0"
RUNTIME_PM_ON_AC=on
RUNTIME_PM_ON_BAT=auto
RUNTIME_PM_ALL=1
RUNTIME_PM_DRIVER_BLACKLIST="radeon nouveau"
USB_AUTOSUSPEND=1
USB_BLACKLIST_WWAN=1
USB_AUTOSUSPEND_DISABLE_ON_SHUTDOWN=1
RESTORE_DEVICE_STATE_ON_STARTUP=0
DEVICES_TO_DISABLE_ON_LAN_CONNECT="wifi"
DEVICES_TO_ENABLE_ON_LAN_DISCONNECT="wifi"

+++ System Info
System = Dell Inc. Latitude 3150
BIOS = A05
Release = "Arch Linux"
Kernel = 4.7.2-2-ck #1 SMP PREEMPT Fri Sep 2 13:44:48 EDT 2016 x86_64
/proc/cmdline = initrd=\intel-ucode.img initrd=\initramfs-linux-ck.img root=PARTUUID=c47b0f9f-23fd-47bc-ada2-7aaca8ef916e pcie_aspm=force acpi_osi=Linux acpi_osi='!Windows 2012' resume=PARTUUID=c47b0f9f-23fd-47bc-ada2-7aaca8ef916e resume_offset=51200 ipv6.disable_ipv6=1 rw ####usbcore.autosuspend=15 rw
Init system = systemd
Boot mode = UEFI

+++ TLP Status
State = enabled
Last run = 05:02:10 PM, 5 sec(s) ago
Mode = battery
Power source = battery

+++ Processor
CPU model = Intel(R) Pentium(R) CPU N3540 @ 2.16GHz

/sys/devices/system/cpu/cpu0/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/cpu1/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu1/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu1/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/cpu2/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu2/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu2/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu2/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu2/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/cpu3/cpufreq/scaling_driver = intel_pstate
/sys/devices/system/cpu/cpu3/cpufreq/scaling_governor = powersave
/sys/devices/system/cpu/cpu3/cpufreq/scaling_available_governors = performance powersave
/sys/devices/system/cpu/cpu3/cpufreq/scaling_min_freq = 499800 [kHz]
/sys/devices/system/cpu/cpu3/cpufreq/scaling_max_freq = 2665600 [kHz]

/sys/devices/system/cpu/intel_pstate/min_perf_pct = 18
/sys/devices/system/cpu/intel_pstate/max_perf_pct = 50
/sys/devices/system/cpu/intel_pstate/no_turbo = 0
/sys/devices/system/cpu/intel_pstate/turbo_pct = 23
/sys/devices/system/cpu/intel_pstate/num_pstates = 27

x86_energy_perf_policy.cpu0 = powersave
x86_energy_perf_policy.cpu1 = powersave
x86_energy_perf_policy.cpu2 = powersave
x86_energy_perf_policy.cpu3 = powersave

/proc/sys/kernel/nmi_watchdog = 0

+++ Undervolting
PHC kernel not available.

+++ Temperatures
CPU temp = 54 [°C]
Fan speed = (not available)

+++ File System
/proc/sys/vm/laptop_mode = 2
/proc/sys/vm/dirty_writeback_centisecs = 6000
/proc/sys/vm/dirty_expire_centisecs = 6000
/proc/sys/vm/dirty_ratio = 20
/proc/sys/vm/dirty_background_ratio = 10
/proc/sys/fs/xfs/age_buffer_centisecs = (not available)
/proc/sys/fs/xfs/xfssyncd_centisecs = (not available)
/proc/sys/fs/xfs/xfsbufd_centisecs = (not available)

+++ Storage Devices
/dev/sda:
Disk ID = ata-TOSHIBA_THNSNJ256GCSU_552S1043TB4W
Model = TOSHIBA THNSNJ256GCSU
Firmware = JURA0101
APM Level = none/disabled
Status = active/idle
TRIM = supported
Scheduler = cfq

Runtime PM: control = on, autosuspend_delay = -1

SMART info:
5 Reallocated_Sector_Ct = 0
9 Power_On_Hours = 1479 [h]
12 Power_Cycle_Count = 855
194 Temperature_Celsius = 35 (Min/Max 17/40) [°C]

/dev/sdb:
Disk ID = ata-Crucial_CT250MX200SSD6_162112C6D4EF
Model = Crucial_CT250MX200SSD6
Firmware = MU03
APM Level = none/disabled
Status = active/idle
TRIM = supported
Scheduler = cfq

Runtime PM: control = on, autosuspend_delay = -1

SMART info:
9 Power_On_Hours = 178 [h]
12 Power_Cycle_Count = 138
194 Temperature_Celsius = 51 (Min/Max 26/55) [°C]

+++ SATA Aggressive Link Power Management
/sys/class/scsi_host/host0/link_power_management_policy = min_power
/sys/class/scsi_host/host1/link_power_management_policy = min_power

+++ AHCI Host Controller Runtime Power Management
/sys/bus/pci/devices/0000:00:13.0/ata1/power/control = on
/sys/bus/pci/devices/0000:00:13.0/ata2/power/control = on

+++ PCIe Active State Power Management
/sys/module/pcie_aspm/parameters/policy = powersave

+++ Intel Graphics
/sys/module/i915/parameters/powersave = (not available)
/sys/module/i915/parameters/enable_rc6 = 1 (enabled)
/sys/module/i915/parameters/enable_dc = -1 (use per-chip default)
/sys/module/i915/parameters/enable_fbc = -1 (use per-chip default)
/sys/module/i915/parameters/enable_psr = 0 (disabled)
/sys/module/i915/parameters/lvds_downclock = (not available)
/sys/module/i915/parameters/modeset = -1 (use per-chip default)
/sys/module/i915/parameters/semaphores = -1 (use per-chip default)

+++ Wireless
bluetooth = on
wifi = on
wwan = none (no device)

hci0(btusb) : bluetooth, not connected
wlp3s0(iwlwifi) : wifi, connected, power management = on

+++ Audio
/sys/module/snd_hda_intel/parameters/power_save = 1
/sys/module/snd_hda_intel/parameters/power_save_controller = Y

+++ Runtime Power Management
Device classes = all
Device blacklist = (not configured)
Driver blacklist = radeon nouveau

/sys/bus/pci/devices/0000:00:00.0/power/control = auto (0x060000, Host bridge, iosf_mbi_pci)
/sys/bus/pci/devices/0000:00:02.0/power/control = auto (0x030000, VGA compatible controller, i915)
/sys/bus/pci/devices/0000:00:13.0/power/control = auto (0x010601, SATA controller, ahci)
/sys/bus/pci/devices/0000:00:14.0/power/control = auto (0x0c0330, USB controller, xhci_hcd)
/sys/bus/pci/devices/0000:00:1a.0/power/control = auto (0x108000, Encryption controller, mei_txe)
/sys/bus/pci/devices/0000:00:1b.0/power/control = auto (0x040300, Audio device, snd_hda_intel)
/sys/bus/pci/devices/0000:00:1c.0/power/control = auto (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1c.1/power/control = auto (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1c.2/power/control = auto (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1c.3/power/control = auto (0x060400, PCI bridge, pcieport)
/sys/bus/pci/devices/0000:00:1f.0/power/control = auto (0x060100, ISA bridge, lpc_ich)
/sys/bus/pci/devices/0000:00:1f.3/power/control = auto (0x0c0500, SMBus, i801_smbus)
/sys/bus/pci/devices/0000:02:00.0/power/control = auto (0x080501, SD Host controller, sdhci-pci)
/sys/bus/pci/devices/0000:03:00.0/power/control = auto (0x028000, Network controller, iwlwifi)
/sys/bus/pci/devices/0000:04:00.0/power/control = auto (0x020000, Ethernet controller, r8169)

+++ USB
Autosuspend = enabled
Device whitelist = (not configured)
Device blacklist = (not configured)
WWAN blacklist = enabled

Bus 002 Device 001 ID 1d6b:0003 control = auto, autosuspend_delay_ms = 0 -- Linux Foundation 3.0 root hub (hub)
Bus 001 Device 004 ID 1bcf:28ae control = auto, autosuspend_delay_ms = 2000 -- Sunplus Innovation Technology Inc. Laptop Integrated Webcam HD (uvcvideo)
Bus 001 Device 003 ID 8087:0a2a control = auto, autosuspend_delay_ms = 2000 -- Intel Corp. (btusb)
Bus 001 Device 002 ID 1050:0407 control = on, autosuspend_delay_ms = 2000 -- Yubico.com Yubikey 4 OTP+U2F+CCID (usbhid, usbfs)
Bus 001 Device 001 ID 1d6b:0002 control = auto, autosuspend_delay_ms = 0 -- Linux Foundation 2.0 root hub (hub)

+++ Battery Status
/sys/class/power_supply/BAT0/manufacturer = Samsung SDI
/sys/class/power_supply/BAT0/model_name = DELL R5MD0D9
/sys/class/power_supply/BAT0/cycle_count = (not supported)
/sys/class/power_supply/BAT0/charge_full_design = 3400 [mAh]
/sys/class/power_supply/BAT0/charge_full = 3400 [mAh]
/sys/class/power_supply/BAT0/charge_now = 3304 [mAh]
/sys/class/power_supply/BAT0/current_now = 770 [mA]
/sys/class/power_supply/BAT0/status = Discharging

Charge = 97.2 [%]
Capacity = 100.0 [%]

+++ Battery Status
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/manufacturer = (not available)
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/model_name = Bluetooth Mouse M557
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/cycle_count = (not supported)
/sys/class/power_supply/hid-00:1f:20:e1:13:39-battery/status = Discharging

Charge = 97.2 [%]
Capacity = 100.0 [%]

Running "sudo tlp ac" or "sudo tlp bat" produces no errors on the commandline nor entries in the journal.

Could this error be associated with the recent update to dbus:

[2016-08-26 12:42] [ALPM] removed python-dbus (1.2.4-1)
[2016-08-26 22:08] [ALPM] installed python-dbus (1.2.4-1)
[2016-08-28 00:37] [ALPM] removed libdbus (1.10.8-1)
[2016-08-28 00:37] [ALPM] upgraded dbus (1.10.8-1 -> 1.10.10-3)

which has been causing various issues:

https://bbs.archlinux.org/viewtopic.php?id=216001
https://bbs.archlinux.org/viewtopic.php?id=216523

Thanks in advance and please let me know if you need additional info.

Halocaridina

[linrunner]

Hi,

short answer: works as designed. Ignore the "errors".

Long answer: rc = 4 means that an instance of tlp is already running applying settings. E.g. tlp is "locked" and the new instance just terminates without doing anything. This is necessary because on most laptops a change of power source triggers multiple udev events (use tlp-stat --pev to watch them). TLP < 0.9 didn't block these duplicate invocations.

[halocaridina]

Hi linrunner,

Ok, good to know that this really isn't an "issue". This is resolved and can be closed.

Cheers,

Halocaridina