[Pkg-xfce-devel] Bug#773913: Bug#773913: Lightdm switches immediately to a black screen

Thomas Goirand thomas at goirand.fr
Thu Apr 9 07:55:00 UTC 2015


On Mon, Mar 30, 2015 at 12:18:20AM +0200, Thomas Goirand wrote:
 >> What happens is, if I leave my laptop unused for a (very) long
 >> period
 >> of time idle, it goes into darkness (slowly fades out, then full
 >> screen black).
 >
 > So something in your desktop environment handles the brightness and
 > sets it to minimum?

Yes, the screen saver.

 >> When I want to wake-up my latop, I just press any key. This wakes up
 >> the laptop, but it does *not* set the screen brightness back to
 >> normal.
 >>
 >> Increasing the brightness on the lightdm password prompt doesn't
 >> work.
 >
 > I assume your laptop needs something in userspace to handle the
 > brightness keys, then?

I believe my mate desktop is somehow handling this.

 >> However, if I just type my password (blankly, hoping it works...),
 >> then I get to X (using the mate Desktop in my case), then brightness
 >> control works, and I can see the screen again.
 >
 >Because MATE handles the brightness keys.

Yes, and lightdm should as well.

 >> I believe that the best way to fix it, is to make sure that the
 >> brightness controls are *always* working in lightdm. If I get back to
 >> lightdm with a black screen, I don't really mind if I can fix that by
 >> increasing the brightness...
 >
 > Sure, but I'm not sure handling the brightness keys are really the
 > role of a login screen. I'll forward this upstream but don't hold your
 > breath.

If we can't handle the brightness keys, then just setting-up the 
brightness could be a quick and dirty fix-up. Here's a few way to do it 
on my laptop:

# This needs root:
echo 4792 > /sys/class/backlight/intel_backlight/brightness

# This needs xbacklight to be installed, but this is from userland:
xbacklight -inc 100%

Do you know if the above can be set somewhere in the lightdm config as a 
hook script or something? If that is for *me* only, this type of hack is 
enough (but of course, a more generic / less dirty way to fix things for 
everyone else would be better...).

 >> If I may help to debug the issue in any way, let me know. I'd be
 >> happy to do whatever you propose to debug the issue or test some
 >> fixes.
 >
 >It might help to know which kind of laptop it is.

My laptop is a Lenovo T440p. I have attached the output of dmidecode and 
lspci, if that helps.

Cheers,

Thomas Goirand (zigo)

-------------- next part --------------
# dmidecode 2.12
SMBIOS 2.7 present.
67 structures occupying 2731 bytes.
Table at 0xBC80D000.

Handle 0x0000, DMI type 4, 42 bytes
Processor Information
	Socket Designation: CPU Socket - U3E1
	Type: Central Processor
	Family: Core i7
	Manufacturer: Intel(R) Corporation
	ID: C3 06 03 00 FF FB EB BF
	Signature: Type 0, Family 6, Model 60, Stepping 3
	Flags:
		FPU (Floating-point unit on-chip)
		VME (Virtual mode extension)
		DE (Debugging extension)
		PSE (Page size extension)
		TSC (Time stamp counter)
		MSR (Model specific registers)
		PAE (Physical address extension)
		MCE (Machine check exception)
		CX8 (CMPXCHG8 instruction supported)
		APIC (On-chip APIC hardware supported)
		SEP (Fast system call)
		MTRR (Memory type range registers)
		PGE (Page global enable)
		MCA (Machine check architecture)
		CMOV (Conditional move instruction supported)
		PAT (Page attribute table)
		PSE-36 (36-bit page size extension)
		CLFSH (CLFLUSH instruction supported)
		DS (Debug store)
		ACPI (ACPI supported)
		MMX (MMX technology supported)
		FXSR (FXSAVE and FXSTOR instructions supported)
		SSE (Streaming SIMD extensions)
		SSE2 (Streaming SIMD extensions 2)
		SS (Self-snoop)
		HTT (Multi-threading)
		TM (Thermal monitor supported)
		PBE (Pending break enabled)
	Version: Intel(R) Core(TM) i7-4810MQ CPU @ 2.80GHz
	Voltage: 0.8 V
	External Clock: 100 MHz
	Max Speed: 2800 MHz
	Current Speed: 2800 MHz
	Status: Populated, Enabled
	Upgrade: Socket rPGA988B
	L1 Cache Handle: 0x0002
	L2 Cache Handle: 0x0003
	L3 Cache Handle: 0x0004
	Serial Number: None
	Asset Tag: None
	Part Number: None
	Core Count: 4
	Core Enabled: 4
	Thread Count: 8
	Characteristics:
		64-bit capable

Handle 0x0001, DMI type 7, 19 bytes
Cache Information
	Socket Designation: L1-Cache
	Configuration: Enabled, Not Socketed, Level 1
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 32 kB
	Maximum Size: 32 kB
	Supported SRAM Types:
		Asynchronous
	Installed SRAM Type: Asynchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Data
	Associativity: 8-way Set-associative

Handle 0x0002, DMI type 7, 19 bytes
Cache Information
	Socket Designation: L1-Cache
	Configuration: Enabled, Not Socketed, Level 1
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 32 kB
	Maximum Size: 32 kB
	Supported SRAM Types:
		Asynchronous
	Installed SRAM Type: Asynchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Instruction
	Associativity: 8-way Set-associative

Handle 0x0003, DMI type 7, 19 bytes
Cache Information
	Socket Designation: L2-Cache
	Configuration: Enabled, Not Socketed, Level 2
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 256 kB
	Maximum Size: 256 kB
	Supported SRAM Types:
		Asynchronous
	Installed SRAM Type: Asynchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Unified
	Associativity: 8-way Set-associative

Handle 0x0004, DMI type 7, 19 bytes
Cache Information
	Socket Designation: L3-Cache
	Configuration: Enabled, Not Socketed, Level 3
	Operational Mode: Write Back
	Location: Internal
	Installed Size: 6144 kB
	Maximum Size: 6144 kB
	Supported SRAM Types:
		Asynchronous
	Installed SRAM Type: Asynchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Unified
	Associativity: 12-way Set-associative

Handle 0x0005, DMI type 16, 23 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory
	Error Correction Type: None
	Maximum Capacity: 16 GB
	Error Information Handle: Not Provided
	Number Of Devices: 2

Handle 0x0006, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x0005
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 8192 MB
	Form Factor: SODIMM
	Set: None
	Locator: ChannelA-DIMM0
	Bank Locator: BANK 0
	Type: DDR3
	Type Detail: Synchronous
	Speed: 1600 MHz
	Manufacturer: Samsung
	Serial Number: <REMOVED-FOR-PRIVACY-REASONS>
	Asset Tag: None
	Part Number: M471B1G73QH0-YK0  
	Rank: Unknown
	Configured Clock Speed: 1600 MHz

Handle 0x0007, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x0005
	Error Information Handle: Not Provided
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 8192 MB
	Form Factor: SODIMM
	Set: None
	Locator: ChannelB-DIMM0
	Bank Locator: BANK 2
	Type: DDR3
	Type Detail: Synchronous
	Speed: 1600 MHz
	Manufacturer: Samsung
	Serial Number: <REMOVED-FOR-PRIVACY-REASONS>
	Asset Tag: None
	Part Number: M471B1G73QH0-YK0  
	Rank: Unknown
	Configured Clock Speed: 1600 MHz

Handle 0x0008, DMI type 19, 31 bytes
Memory Array Mapped Address
	Starting Address: 0x00000000000
	Ending Address: 0x003FFFFFFFF
	Range Size: 16 GB
	Physical Array Handle: 0x0005
	Partition Width: 2

Handle 0x0009, DMI type 129, 8 bytes
OEM-specific Type
	Header and Data:
		81 08 09 00 01 01 02 01
	Strings:
		Intel_ASF
		Intel_ASF_001

Handle 0x000A, DMI type 134, 13 bytes
OEM-specific Type
	Header and Data:
		86 0D 0A 00 13 02 15 20 00 00 00 00 00

Handle 0x000C, DMI type 1, 27 bytes
System Information
	Manufacturer: LENOVO
	Product Name: 20ANCTO1WW
	Version: ThinkPad T440p
	Serial Number: <REMOVED-FOR-PRIVACY-REASONS>
	UUID: <REMOVED-FOR-PRIVACY-REASONS>
	Wake-up Type: Power Switch
	SKU Number: LENOVO_MT_20AN_BU_Think_FM_ThinkPad T440p
	Family: ThinkPad T440p

Handle 0x000D, DMI type 2, 15 bytes
Base Board Information
	Manufacturer: LENOVO
	Product Name: 20ANCTO1WW
	Version: SDK0E50510 WIN
	Serial Number: <REMOVED-FOR-PRIVACY-REASONS>
	Asset Tag: Not Available
	Features:
		Board is a hosting board
		Board is replaceable
	Location In Chassis: Not Available
	Chassis Handle: 0x0000
	Type: Motherboard
	Contained Object Handles: 0

Handle 0x000E, DMI type 3, 22 bytes
Chassis Information
	Manufacturer: LENOVO
	Type: Notebook
	Lock: Not Present
	Version: Not Available
	Serial Number: <REMOVED-FOR-PRIVACY-REASONS>
	Asset Tag: No Asset Information
	Boot-up State: Unknown
	Power Supply State: Unknown
	Thermal State: Unknown
	Security Status: Unknown
	OEM Information: 0x00000000
	Height: Unspecified
	Number Of Power Cords: Unspecified
	Contained Elements: 0
	SKU Number: Not Specified

Handle 0x000F, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: Not Available
	Internal Connector Type: None
	External Reference Designator: USB 1
	External Connector Type: Access Bus (USB)
	Port Type: USB

Handle 0x0010, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: Not Available
	Internal Connector Type: None
	External Reference Designator: USB 2
	External Connector Type: Access Bus (USB)
	Port Type: USB

Handle 0x0011, DMI type 126, 9 bytes
Inactive

Handle 0x0012, DMI type 126, 9 bytes
Inactive

Handle 0x0013, DMI type 126, 9 bytes
Inactive

Handle 0x0014, DMI type 126, 9 bytes
Inactive

Handle 0x0015, DMI type 126, 9 bytes
Inactive

Handle 0x0016, DMI type 126, 9 bytes
Inactive

Handle 0x0017, DMI type 126, 9 bytes
Inactive

Handle 0x0018, DMI type 126, 9 bytes
Inactive

Handle 0x0019, DMI type 126, 9 bytes
Inactive

Handle 0x001A, DMI type 126, 9 bytes
Inactive

Handle 0x001B, DMI type 126, 9 bytes
Inactive

Handle 0x001C, DMI type 126, 9 bytes
Inactive

Handle 0x001D, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: Not Available
	Internal Connector Type: None
	External Reference Designator: Ethernet
	External Connector Type: RJ-45
	Port Type: Network Port

Handle 0x001E, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: Not Available
	Internal Connector Type: None
	External Reference Designator: External Monitor
	External Connector Type: DB-15 female
	Port Type: Video Port

Handle 0x001F, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: Not Available
	Internal Connector Type: None
	External Reference Designator: Mini DisplayPort
	External Connector Type: Other
	Port Type: Video Port

Handle 0x0020, DMI type 126, 9 bytes
Inactive

Handle 0x0021, DMI type 126, 9 bytes
Inactive

Handle 0x0022, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: Not Available
	Internal Connector Type: None
	External Reference Designator: Headphone/Microphone Combo Jack1
	External Connector Type: Mini Jack (headphones)
	Port Type: Audio Port

Handle 0x0023, DMI type 126, 9 bytes
Inactive

Handle 0x0024, DMI type 9, 17 bytes
System Slot Information
	Designation: Media Card Slot
	Type: Other
	Current Usage: Available
	Length: Other
	Characteristics:
		Hot-plug devices are supported
	Bus Address: 0000:00:00.0

Handle 0x0025, DMI type 126, 17 bytes
Inactive

Handle 0x0026, DMI type 9, 17 bytes
System Slot Information
	Designation: SimCard Slot
	Type: Other
	Current Usage: Available
	Length: Other
	Characteristics: None
	Bus Address: 0000:00:00.0

Handle 0x0027, DMI type 10, 6 bytes
On Board Device Information
	Type: Other
	Status: Enabled
	Description: IBM Embedded Security hardware

Handle 0x0028, DMI type 12, 5 bytes
System Configuration Options

Handle 0x0029, DMI type 13, 22 bytes
BIOS Language Information
	Language Description Format: Abbreviated
	Installable Languages: 1
		en-US
	Currently Installed Language: en-US

Handle 0x002A, DMI type 22, 26 bytes
Portable Battery
	Location: Front
	Manufacturer: Batt Manufacture
	Name: Batt Device Name
	Design Capacity: Unknown
	Design Voltage: Unknown
	SBDS Version: Batt SBDS Version
	Maximum Error: Unknown
	SBDS Serial Number: 0000
	SBDS Manufacture Date: 1980-00-00
	SBDS Chemistry: Batt SBDS Chemistry
	OEM-specific Information: 0x00000000

Handle 0x002B, DMI type 18, 23 bytes
32-bit Memory Error Information
	Type: OK
	Granularity: Unknown
	Operation: Unknown
	Vendor Syndrome: Unknown
	Memory Array Address: Unknown
	Device Address: Unknown
	Resolution: Unknown

Handle 0x002C, DMI type 21, 7 bytes
Built-in Pointing Device
	Type: Track Point
	Interface: PS/2
	Buttons: 3

Handle 0x002D, DMI type 21, 7 bytes
Built-in Pointing Device
	Type: Touch Pad
	Interface: PS/2
	Buttons: 2

Handle 0x002E, DMI type 131, 22 bytes
OEM-specific Type
	Header and Data:
		83 16 2E 00 01 00 00 00 00 00 00 00 00 00 00 00
		00 00 00 00 00 01
	Strings:
		TVT-Enablement

Handle 0x002F, DMI type 136, 6 bytes
OEM-specific Type
	Header and Data:
		88 06 2F 00 5A 5A

Handle 0x0030, DMI type 134, 16 bytes
OEM-specific Type
	Header and Data:
		86 10 30 00 00 53 54 4D 20 01 01 00 00 03 01 02
	Strings:
		TPM INFO
		System Reserved

Handle 0x0031, DMI type 130, 20 bytes
OEM-specific Type
	Header and Data:
		82 14 31 00 24 41 4D 54 01 01 01 01 01 A5 FF 03
		01 00 01 00

Handle 0x0032, DMI type 131, 64 bytes
OEM-specific Type
	Header and Data:
		83 40 32 00 3F 00 00 00 09 00 00 00 00 00 1C 00
		F8 00 4F 8C 00 00 00 00 09 E0 00 00 01 00 09 00
		0B 04 14 00 00 00 00 00 C8 00 3A 15 00 00 00 00
		00 00 00 00 66 00 00 00 76 50 72 6F 00 00 00 00

Handle 0x0033, DMI type 133, 5 bytes
OEM-specific Type
	Header and Data:
		85 05 33 00 01
	Strings:
		KHOIHGIUCCHHII

Handle 0x0034, DMI type 135, 83 bytes
OEM-specific Type
	Header and Data:
		87 53 34 00 54 50 07 02 42 41 59 20 49 2F 4F 20
		04 00 01 01 40 00 1F 02 06 00 00 00 00 01 00 00
		00 00 00 00 00 00 01 01 04 00 00 00 00 00 00 01
		02 FF 00 00 00 00 00 00 01 03 FF 00 00 00 00 00
		00 01 04 04 00 00 00 00 00 00 01 05 02 00 00 00
		00 00 00

Handle 0x0035, DMI type 15, 31 bytes
System Event Log
	Area Length: 242 bytes
	Header Start Offset: 0x0000
	Header Length: 16 bytes
	Data Start Offset: 0x0010
	Access Method: General-purpose non-volatile data functions
	Access Address: 0x00F0
	Status: Valid, Not Full
	Change Token: 0x0000000E
	Header Format: Type 1
	Supported Log Type Descriptors: 4
	Descriptor 1: POST error
	Data Format 1: POST results bitmap
	Descriptor 2: PCI system error
	Data Format 2: None
	Descriptor 3: System reconfigured
	Data Format 3: None
	Descriptor 4: Log area reset/cleared
	Data Format 4: None

Handle 0x0036, DMI type 140, 85 bytes
OEM-specific Type
	Header and Data:
		8C 55 36 00 4C 45 4E 4F 56 4F 0B 00 01 01 63 31
		E4 EC 98 B7 0E F5 EB 97 37 21 38 58 0A 01 00 04
		50 60 C7 74 A4 6B CB B9 18 C6 FC 04 31 3F DF 01
		00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
		00 00 00 07 00 00 00 7E 02 00 F0 7E 02 00 F0 7E
		02 00 F0 00 F0

Handle 0x0037, DMI type 140, 47 bytes
OEM-specific Type
	Header and Data:
		8C 2F 37 00 4C 45 4E 4F 56 4F 0B 01 01 29 00 EC
		54 71 90 A1 01 C9 E7 14 5F 99 0A E1 66 03 71 00
		00 00 00 10 00 10 00 10 01 D0 00 20 01 00 01

Handle 0x0038, DMI type 140, 63 bytes
OEM-specific Type
	Header and Data:
		8C 3F 38 00 4C 45 4E 4F 56 4F 0B 02 01 00 00 00
		00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
		00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
		00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Handle 0x0039, DMI type 140, 17 bytes
OEM-specific Type
	Header and Data:
		8C 11 39 00 4C 45 4E 4F 56 4F 0B 03 01 00 00 00
		00

Handle 0x003A, DMI type 140, 19 bytes
OEM-specific Type
	Header and Data:
		8C 13 3A 00 4C 45 4E 4F 56 4F 0B 04 01 B2 00 4D
		53 20 00

Handle 0x003B, DMI type 140, 19 bytes
OEM-specific Type
	Header and Data:
		8C 13 3B 00 4C 45 4E 4F 56 4F 0B 05 01 07 00 00
		00 00 00

Handle 0x003C, DMI type 140, 23 bytes
OEM-specific Type
	Header and Data:
		8C 17 3C 00 4C 45 4E 4F 56 4F 0B 06 01 8A 13 04
		00 00 00 00 00 00 00

Handle 0x003D, DMI type 24, 5 bytes
Hardware Security
	Power-On Password Status: Disabled
	Keyboard Password Status: Not Implemented
	Administrator Password Status: Disabled
	Front Panel Reset Status: Not Implemented

Handle 0x003E, DMI type 132, 7 bytes
OEM-specific Type
	Header and Data:
		84 07 3E 00 01 C0 36

Handle 0x003F, DMI type 135, 18 bytes
OEM-specific Type
	Header and Data:
		87 12 3F 00 54 50 07 01 01 E0 07 00 00 00 07 00
		00 00

Handle 0x0040, DMI type 0, 24 bytes
BIOS Information
	Vendor: LENOVO
	Version: GLET77WW (2.31 )
	Release Date: 01/27/2015
	Address: 0xE0000
	Runtime Size: 128 kB
	ROM Size: 12288 kB
	Characteristics:
		PCI is supported
		PNP is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		ACPI is supported
		USB legacy is supported
		BIOS boot specification is supported
		Targeted content distribution is supported
		UEFI is supported
	BIOS Revision: 2.31
	Firmware Revision: 1.8

Handle 0x0041, DMI type 140, 15 bytes
OEM-specific Type
	Header and Data:
		8C 0F 41 00 4C 45 4E 4F 56 4F 0B 07 01 01 02
	Strings:
		GLHT25WW
		11/14/2013

Handle 0x0042, DMI type 140, 43 bytes
OEM-specific Type
	Header and Data:
		8C 2B 42 00 4C 45 4E 4F 56 4F 0B 08 01 FF FF FF
		FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
		FF FF FF FF FF FF FF FF FF FF FF

Handle 0xFEFF, DMI type 127, 4 bytes
End Of Table

-------------- next part --------------
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, fast devsel, latency 0
	Capabilities: [e0] Vendor Specific Information: Len=0c <?>

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0
	Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
	Capabilities: [88] Subsystem: Lenovo Device 220f
	Capabilities: [80] Power Management version 3
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [a0] Express Root Port (Slot+), MSI 00
	Capabilities: [100] Virtual Channel
	Capabilities: [140] Root Complex Link
	Capabilities: [d94] #19
	Kernel driver in use: pcieport

00:01.1 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x8 Controller (rev 06) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0
	Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
	I/O behind bridge: 00003000-00003fff
	Memory behind bridge: f0000000-f0ffffff
	Prefetchable memory behind bridge: 00000000c0000000-00000000d1ffffff
	Capabilities: [88] Subsystem: Lenovo Device 220f
	Capabilities: [80] Power Management version 3
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [a0] Express Root Port (Slot+), MSI 00
	Capabilities: [100] Virtual Channel
	Capabilities: [140] Root Complex Link
	Capabilities: [d94] #19
	Kernel driver in use: pcieport

00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) (prog-if 00 [VGA controller])
	Subsystem: Lenovo Device 221d
	Flags: bus master, fast devsel, latency 0, IRQ 49
	Memory at f1000000 (64-bit, non-prefetchable) [size=4M]
	Memory at e0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 4000 [size=64]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [d0] Power Management version 2
	Capabilities: [a4] PCI Advanced Features
	Kernel driver in use: i915

00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, fast devsel, latency 0, IRQ 48
	Memory at f1630000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [50] Power Management version 2
	Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Kernel driver in use: snd_hda_intel

00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 04) (prog-if 30 [XHCI])
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, medium devsel, latency 0, IRQ 51
	Memory at f1620000 (64-bit, non-prefetchable) [size=64K]
	Capabilities: [70] Power Management version 2
	Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
	Kernel driver in use: xhci_hcd

00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, fast devsel, latency 0, IRQ 45
	Memory at f1639000 (64-bit, non-prefetchable) [size=16]
	Capabilities: [50] Power Management version 3
	Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Kernel driver in use: mei_me

00:16.3 Serial controller: Intel Corporation 8 Series/C220 Series Chipset Family KT Controller (rev 04) (prog-if 02 [16550])
	Subsystem: Lenovo Device 220e
	Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
	I/O ports at 40b0 [size=8]
	Memory at f1640000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
	Kernel driver in use: serial

00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-LM (rev 04)
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, fast devsel, latency 0, IRQ 52
	Memory at f1600000 (32-bit, non-prefetchable) [size=128K]
	Memory at f163f000 (32-bit, non-prefetchable) [size=4K]
	I/O ports at 4080 [size=32]
	Capabilities: [c8] Power Management version 2
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [e0] PCI Advanced Features
	Kernel driver in use: e1000e

00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 04) (prog-if 20 [EHCI])
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, medium devsel, latency 0, IRQ 16
	Memory at f163e000 (32-bit, non-prefetchable) [size=1K]
	Capabilities: [50] Power Management version 2
	Capabilities: [58] Debug port: BAR=1 offset=00a0
	Capabilities: [98] PCI Advanced Features
	Kernel driver in use: ehci-pci

00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 04)
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, fast devsel, latency 0, IRQ 46
	Memory at f1634000 (64-bit, non-prefetchable) [size=16K]
	Capabilities: [50] Power Management version 2
	Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [100] Virtual Channel
	Kernel driver in use: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0
	Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
	Memory behind bridge: f1500000-f15fffff
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Lenovo ThinkPad T440p
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport

00:1c.1 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #2 (rev d4) (prog-if 00 [Normal decode])
	Flags: bus master, fast devsel, latency 0
	Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
	Memory behind bridge: f1400000-f14fffff
	Capabilities: [40] Express Root Port (Slot+), MSI 00
	Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
	Capabilities: [90] Subsystem: Lenovo ThinkPad T440p
	Capabilities: [a0] Power Management version 3
	Kernel driver in use: pcieport

00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 04) (prog-if 20 [EHCI])
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, medium devsel, latency 0, IRQ 23
	Memory at f163d000 (32-bit, non-prefetchable) [size=1K]
	Capabilities: [50] Power Management version 2
	Capabilities: [58] Debug port: BAR=1 offset=00a0
	Capabilities: [98] PCI Advanced Features
	Kernel driver in use: ehci-pci

00:1f.0 ISA bridge: Intel Corporation QM87 Express LPC Controller (rev 04)
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, medium devsel, latency 0
	Capabilities: [e0] Vendor Specific Information: Len=0c <?>
	Kernel driver in use: lpc_ich

00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 04) (prog-if 01 [AHCI 1.0])
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 47
	I/O ports at 40a8 [size=8]
	I/O ports at 40bc [size=4]
	I/O ports at 40a0 [size=8]
	I/O ports at 40b8 [size=4]
	I/O ports at 4060 [size=32]
	Memory at f163c000 (32-bit, non-prefetchable) [size=2K]
	Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
	Capabilities: [70] Power Management version 3
	Capabilities: [a8] SATA HBA v1.0
	Kernel driver in use: ahci

00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 04)
	Subsystem: Lenovo ThinkPad T440p
	Flags: medium devsel, IRQ 18
	Memory at f1638000 (64-bit, non-prefetchable) [size=256]
	I/O ports at efa0 [size=32]
	Kernel driver in use: i801_smbus

02:00.0 VGA compatible controller: NVIDIA Corporation GK208M [GeForce GT 730M] (rev a1) (prog-if 00 [VGA controller])
	Flags: bus master, fast devsel, latency 0, IRQ 53
	Memory at f0000000 (32-bit, non-prefetchable) [size=16M]
	Memory at c0000000 (64-bit, prefetchable) [size=256M]
	Memory at d0000000 (64-bit, prefetchable) [size=32M]
	I/O ports at 3000 [size=128]
	Expansion ROM at <ignored> [disabled]
	Capabilities: [60] Power Management version 3
	Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [78] Express Endpoint, MSI 00
	Capabilities: [100] Virtual Channel
	Capabilities: [128] Power Budgeting <?>
	Capabilities: [600] Vendor Specific Information: ID=0001 Rev=1 Len=024 <?>
	Capabilities: [900] #19
	Kernel driver in use: nouveau

03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5227 PCI Express Card Reader (rev 01)
	Subsystem: Lenovo ThinkPad T440p
	Flags: bus master, fast devsel, latency 0, IRQ 44
	Memory at f1500000 (32-bit, non-prefetchable) [size=4K]
	Capabilities: [40] Power Management version 3
	Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [70] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number 00-00-00-01-00-4c-e0-00
	Capabilities: [150] Latency Tolerance Reporting
	Capabilities: [158] L1 PM Substates
	Kernel driver in use: rtsx_pci

04:00.0 Network controller: Intel Corporation Wireless 7260 (rev 83)
	Subsystem: Intel Corporation Dual Band Wireless-N 7260
	Flags: bus master, fast devsel, latency 0, IRQ 50
	Memory at f1400000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number 5c-c5-d4-ff-ff-68-97-4b
	Capabilities: [14c] Latency Tolerance Reporting
	Capabilities: [154] Vendor Specific Information: ID=cafe Rev=1 Len=014 <?>
	Kernel driver in use: iwlwifi



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