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#1 2018-06-22 05:15:10

ESBDB
Member
Registered: 2017-01-07
Posts: 10

[SOLVED] Laptop HDMI black screen when switching external monitors

Hi

I have looked at other existing threads and none of them that I've found seem to quite have the same issue as me.

I have a Lenovo Y50-70 laptop. I have a problem when connecting a particular screen to the laptop via HDMI (uses a DVI to HDMI cable). Sometimes when I connect it, it just displays black. Both the laptop and the monitor detect they're connected.
I use this laptop at work with a different monitor also via HDMI (pure HDMI) and it has never had this problem. To fix this I have to restart the laptop, which is very annoying as all my stuff is setup and running.
I only use the intel integrated graphics. It has nvidia graphics but dealing with that is too much of a pain on Linux and I don't need it on this laptop so after trying for a short time to setup duel graphics when I first got the laptop I just gave up (I never actually game or anything on this laptop).


uname -r:
4.17.2-1-ARCH
xrandr:
Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 8192 x 8192
eDP-1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 345mm x 194mm
   1920x1080     60.02*+  60.01    59.97    59.96    59.93  
   1680x1050     59.95    59.88  
   1400x1050     59.98  
   1600x900      59.99    59.94    59.95    59.82  
   1280x1024     60.02  
   1400x900      59.96    59.88  
   1280x960      60.00  
   1440x810      60.00    59.97  
   1368x768      59.88    59.85  
   1280x800      59.99    59.97    59.81    59.91  
   1280x720      60.00    59.99    59.86    59.74  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   1024x576      59.95    59.96    59.90    59.82  
   960x600       59.93    60.00  
   960x540       59.96    59.99    59.63    59.82  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   864x486       59.92    59.57  
   700x525       59.98  
   800x450       59.95    59.82  
   640x512       60.02  
   700x450       59.96    59.88  
   640x480       60.00    59.94  
   720x405       59.51    58.99  
   684x384       59.88    59.85  
   640x400       59.88    59.98  
   640x360       59.86    59.83    59.84    59.32  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.63    59.82  
   400x300       60.32    56.34  
   432x243       59.92    59.57  
   320x240       60.05  
   360x202       59.51    59.13  
   320x180       59.84    59.32  
HDMI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
   1920x1080     60.00*+
   1680x1050     59.88  
   1600x900      60.00  
   1280x1024     75.02    60.02  
   1280x960      60.00  
   1152x864      75.00  
   1280x720      60.00  
   1152x720      59.97  
   1024x768      75.03    60.00  
   832x624       74.55  
   800x600       75.00    60.32  
   640x480       75.00    59.94  
   720x400       70.08
dmidecode:
# dmidecode 3.1
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
66 structures occupying 2815 bytes.
Table at 0x9CEBC000.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
	Vendor: LENOVO
	Version: 9ECN37WW(V2.01)
	Release Date: 02/11/2015
	Address: 0xE0000
	Runtime Size: 128 kB
	ROM Size: 6656 kB
	Characteristics:
		PCI is supported
		BIOS is upgradeable
		BIOS shadowing is allowed
		Boot from CD is supported
		Selectable boot is supported
		EDD is supported
		Japanese floppy for NEC 9800 1.2 MB is supported (int 13h)
		Japanese floppy for Toshiba 1.2 MB is supported (int 13h)
		5.25"/360 kB floppy services are supported (int 13h)
		5.25"/1.2 MB floppy services are supported (int 13h)
		3.5"/720 kB floppy services are supported (int 13h)
		3.5"/2.88 MB floppy services are supported (int 13h)
		8042 keyboard services are supported (int 9h)
		CGA/mono video services are supported (int 10h)
		ACPI is supported
		USB legacy is supported
		BIOS boot specification is supported
		Targeted content distribution is supported
		UEFI is supported
	BIOS Revision: 1.55
	Firmware Revision: 2.55

Handle 0x0001, DMI type 1, 27 bytes
System Information
	Manufacturer: LENOVO
	Product Name: 20378
	Version: Lenovo Y50-70
	Serial Number: 3744236902332
	UUID: DBCE4F6E-3B0F-E511-A26A-F0761CD7BFB1
	Wake-up Type: Power Switch
	SKU Number: LENOVO_MT_20378_BU_idea_FM_Lenovo Y50-70
	Family: IDEAPAD

Handle 0x0002, DMI type 2, 16 bytes
Base Board Information
	Manufacturer: LENOVO
	Product Name: Lenovo Y50-70
	Version: 31900059WIN
	Serial Number: CB36024510
	Asset Tag: 31900059WIN
	Features:
		Board is a hosting board
		Board is replaceable
	Location In Chassis: Type2 - Board Chassis Location
	Chassis Handle: 0x0003
	Type: Motherboard
	Contained Object Handles: 0

Handle 0x0003, DMI type 3, 23 bytes
Chassis Information
	Manufacturer: LENOVO
	Type: Notebook
	Lock: Not Present
	Version: Lenovo Y50-70
	Serial Number: CB36024510
	Asset Tag: 31900059WIN
	Boot-up State: Safe
	Power Supply State: Safe
	Thermal State: Safe
	Security Status: None
	OEM Information: 0x00000000
	Height: Unspecified
	Number Of Power Cords: 1
	Contained Elements: 0
	SKU Number: Not Specified

Handle 0x0004, DMI type 4, 42 bytes
Processor Information
	Socket Designation: 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) i7-4720HQ CPU @ 2.60GHz
	Voltage: 0.8 V
	External Clock: 100 MHz
	Max Speed: 2600 MHz
	Current Speed: 2600 MHz
	Status: Populated, Enabled
	Upgrade: Socket LGA1150
	L1 Cache Handle: 0x000B
	L2 Cache Handle: 0x000C
	L3 Cache Handle: 0x000D
	Serial Number: To Be Filled By O.E.M.
	Asset Tag: To Be Filled By O.E.M.
	Part Number: To Be Filled By O.E.M.
	Core Count: 4
	Core Enabled: 4
	Thread Count: 8
	Characteristics:
		64-bit capable
		Multi-Core
		Hardware Thread
		Execute Protection
		Enhanced Virtualization
		Power/Performance Control

Handle 0x0005, DMI type 5, 24 bytes
Memory Controller Information
	Error Detecting Method: None
	Error Correcting Capabilities:
		None
	Supported Interleave: One-way Interleave
	Current Interleave: One-way Interleave
	Maximum Memory Module Size: 8192 MB
	Maximum Total Memory Size: 32768 MB
	Supported Speeds:
		Other
	Supported Memory Types:
		Other
	Memory Module Voltage: Unknown
	Associated Memory Slots: 4
		0x0006
		0x0007
		0x0008
		0x0009
	Enabled Error Correcting Capabilities:
		None

Handle 0x0006, DMI type 6, 12 bytes
Memory Module Information
	Socket Designation: DIMM0
	Bank Connections: None
	Current Speed: Unknown
	Type: DIMM
	Installed Size: 8192 MB (Single-bank Connection)
	Enabled Size: 8192 MB (Single-bank Connection)
	Error Status: OK

Handle 0x0007, DMI type 6, 12 bytes
Memory Module Information
	Socket Designation: DIMM1
	Bank Connections: None
	Current Speed: Unknown
	Type: DIMM
	Installed Size: Not Installed
	Enabled Size: Not Installed
	Error Status: OK

Handle 0x0008, DMI type 6, 12 bytes
Memory Module Information
	Socket Designation: DIMM2
	Bank Connections: None
	Current Speed: Unknown
	Type: DIMM
	Installed Size: Not Installed
	Enabled Size: Not Installed
	Error Status: OK

Handle 0x0009, DMI type 6, 12 bytes
Memory Module Information
	Socket Designation: DIMM3
	Bank Connections: None
	Current Speed: Unknown
	Type: DIMM
	Installed Size: Not Installed
	Enabled Size: Not Installed
	Error Status: OK

Handle 0x000A, 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:
		Synchronous
	Installed SRAM Type: Synchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Data
	Associativity: 8-way Set-associative

Handle 0x000B, 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:
		Synchronous
	Installed SRAM Type: Synchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Instruction
	Associativity: 8-way Set-associative

Handle 0x000C, 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:
		Synchronous
	Installed SRAM Type: Synchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Unified
	Associativity: 8-way Set-associative

Handle 0x000D, 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:
		Synchronous
	Installed SRAM Type: Synchronous
	Speed: Unknown
	Error Correction Type: Single-bit ECC
	System Type: Unified
	Associativity: 12-way Set-associative

Handle 0x000E, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J1A1
	Internal Connector Type: None
	External Reference Designator: Keyboard
	External Connector Type: PS/2
	Port Type: Keyboard Port

Handle 0x000F, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J1A1
	Internal Connector Type: None
	External Reference Designator: Mouse
	External Connector Type: PS/2
	Port Type: Mouse Port

Handle 0x0010, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J2A2
	Internal Connector Type: None
	External Reference Designator: COM 1
	External Connector Type: DB-9 male
	Port Type: Serial Port 16550A Compatible

Handle 0x0011, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J3A1
	Internal Connector Type: None
	External Reference Designator: USB
	External Connector Type: Access Bus (USB)
	Port Type: USB

Handle 0x0012, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J3A1
	Internal Connector Type: None
	External Reference Designator: USB
	External Connector Type: Access Bus (USB)
	Port Type: USB

Handle 0x0013, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J3A1
	Internal Connector Type: None
	External Reference Designator: USB
	External Connector Type: Access Bus (USB)
	Port Type: USB

Handle 0x0014, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J5A1
	Internal Connector Type: None
	External Reference Designator: USB
	External Connector Type: Access Bus (USB)
	Port Type: USB

Handle 0x0015, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J5A1
	Internal Connector Type: None
	External Reference Designator: USB
	External Connector Type: Access Bus (USB)
	Port Type: USB

Handle 0x0016, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J5A1
	Internal Connector Type: None
	External Reference Designator: Network
	External Connector Type: RJ-45
	Port Type: Network Port

Handle 0x0017, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J9G2
	Internal Connector Type: On Board Floppy
	External Reference Designator: OnBoard Floppy Type
	External Connector Type: None
	Port Type: Other

Handle 0x0018, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J7J1
	Internal Connector Type: On Board IDE
	External Reference Designator: OnBoard Primary IDE
	External Connector Type: None
	Port Type: Other

Handle 0x0019, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J2A1
	Internal Connector Type: None
	External Reference Designator: TV OUT
	External Connector Type: Mini DIN
	Port Type: Video Port

Handle 0x001A, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J2A2
	Internal Connector Type: None
	External Reference Designator: CRT
	External Connector Type: DB-15 female
	Port Type: Video Port

Handle 0x001B, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J30
	Internal Connector Type: None
	External Reference Designator: Microphone In
	External Connector Type: Mini Jack (headphones)
	Port Type: Audio Port

Handle 0x001C, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J30
	Internal Connector Type: None
	External Reference Designator: Line In
	External Connector Type: Mini Jack (headphones)
	Port Type: Audio Port

Handle 0x001D, DMI type 8, 9 bytes
Port Connector Information
	Internal Reference Designator: J30
	Internal Connector Type: None
	External Reference Designator: Speaker Out
	External Connector Type: Mini Jack (headphones)
	Port Type: Audio Port

Handle 0x001E, DMI type 9, 17 bytes
System Slot Information
	Designation: J5C1
	Type: x16 PCI Express x16
	Current Usage: Available
	Length: Other
	ID: 1
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:01.0

Handle 0x001F, DMI type 9, 17 bytes
System Slot Information
	Designation: J6C1
	Type: x1 PCI Express x1
	Current Usage: Available
	Length: Other
	ID: 2
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:1c.0

Handle 0x0020, DMI type 9, 17 bytes
System Slot Information
	Designation: J6C2
	Type: x1 PCI Express x1
	Current Usage: Available
	Length: Other
	ID: 3
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:1c.1

Handle 0x0021, DMI type 9, 17 bytes
System Slot Information
	Designation: J6D2
	Type: x1 PCI Express x1
	Current Usage: Available
	Length: Other
	ID: 4
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:1c.2

Handle 0x0022, DMI type 9, 17 bytes
System Slot Information
	Designation: J7C1
	Type: x1 PCI Express x1
	Current Usage: Available
	Length: Other
	ID: 5
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:1c.3

Handle 0x0023, DMI type 9, 17 bytes
System Slot Information
	Designation: J7D2
	Type: x1 PCI Express x1
	Current Usage: Available
	Length: Other
	ID: 6
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:1c.4

Handle 0x0024, DMI type 9, 17 bytes
System Slot Information
	Designation: J8C1
	Type: x1 PCI Express x1
	Current Usage: Available
	Length: Other
	ID: 7
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:1c.5

Handle 0x0025, DMI type 9, 17 bytes
System Slot Information
	Designation: J8C2
	Type: x16 PCI Express x16
	Current Usage: Available
	Length: Other
	ID: 8
	Characteristics:
		PME signal is supported
		Hot-plug devices are supported
	Bus Address: 0000:00:1c.7

Handle 0x0026, DMI type 11, 5 bytes
OEM Strings
	String 1: String1 for Original Equipment Manufacturer
	String 2: String2 for Original Equipment Manufacturer
	String 3: String3 for Original Equipment Manufacturer
	String 4: String4 for Original Equipment Manufacturer
	String 5: String5 for Original Equipment Manufacturer

Handle 0x0027, DMI type 12, 5 bytes
System Configuration Options
	Option 1: String1 for Type12 Equipment Manufacturer
	Option 2: String2 for Type12 Equipment Manufacturer
	Option 3: String3 for Type12 Equipment Manufacturer
	Option 4: String4 for Type12 Equipment Manufacturer

Handle 0x0028, DMI type 13, 22 bytes
BIOS Language Information
	Language Description Format: Long
	Installable Languages: 2
		en|US|iso8859-1
		zh|TW|unicode
	Currently Installed Language: en|US|iso8859-1

Handle 0x0029, DMI type 15, 29 bytes
System Event Log
	Area Length: 0 bytes
	Header Start Offset: 0x0000
	Header Length: 32 bytes
	Data Start Offset: 0x0020
	Access Method: General-purpose non-volatile data functions
	Access Address: 0x0000
	Status: Valid, Not Full
	Change Token: 0x12345678
	Header Format: OEM-specific
	Supported Log Type Descriptors: 3
	Descriptor 1: POST memory resize
	Data Format 1: None
	Descriptor 2: POST error
	Data Format 2: POST results bitmap
	Descriptor 3: Log area reset/cleared
	Data Format 3: None

Handle 0x002A, DMI type 16, 23 bytes
Physical Memory Array
	Location: System Board Or Motherboard
	Use: System Memory
	Error Correction Type: None
	Maximum Capacity: 32 GB
	Error Information Handle: 0x0030
	Number Of Devices: 4

Handle 0x002B, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x002A
	Error Information Handle: 0x002F
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 8192 MB
	Form Factor: SODIMM
	Set: None
	Locator: DIMM0
	Bank Locator: BANK 0
	Type: DDR3
	Type Detail: Synchronous
	Speed: 1600 MT/s
	Manufacturer: Unknown
	Serial Number: 092ABC98
	Asset Tag: Unknown
	Part Number: HMT41GS6BFR8A-PB  
	Rank: 2
	Configured Clock Speed: 1600 MT/s

Handle 0x002C, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x002A
	Error Information Handle: Not Provided
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: DIMM
	Set: None
	Locator: DIMM1
	Bank Locator: BANK 1
	Type: Unknown
	Type Detail: Unknown
	Speed: Unknown
	Manufacturer: Empty
	Serial Number: Empty
	Asset Tag: Unknown
	Part Number: Empty
	Rank: Unknown
	Configured Clock Speed: Unknown

Handle 0x002D, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x002A
	Error Information Handle: Not Provided
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: DIMM
	Set: None
	Locator: DIMM2
	Bank Locator: BANK 2
	Type: Unknown
	Type Detail: Unknown
	Speed: Unknown
	Manufacturer: Empty
	Serial Number: Empty
	Asset Tag: Unknown
	Part Number: Empty
	Rank: Unknown
	Configured Clock Speed: Unknown

Handle 0x002E, DMI type 17, 34 bytes
Memory Device
	Array Handle: 0x002A
	Error Information Handle: Not Provided
	Total Width: Unknown
	Data Width: Unknown
	Size: No Module Installed
	Form Factor: DIMM
	Set: None
	Locator: DIMM3
	Bank Locator: BANK 3
	Type: Unknown
	Type Detail: Unknown
	Speed: Unknown
	Manufacturer: Empty
	Serial Number: Empty
	Asset Tag: Unknown
	Part Number: Empty
	Rank: Unknown
	Configured Clock Speed: Unknown

Handle 0x002F, 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 0x0030, 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 0x0031, DMI type 19, 31 bytes
Memory Array Mapped Address
	Starting Address: 0x00000000000
	Ending Address: 0x001FFFFFFFF
	Range Size: 8 GB
	Physical Array Handle: 0x002A
	Partition Width: 4

Handle 0x0032, DMI type 20, 35 bytes
Memory Device Mapped Address
	Starting Address: 0x00000000000
	Ending Address: 0x001FFFFFFFF
	Range Size: 8 GB
	Physical Device Handle: 0x002B
	Memory Array Mapped Address Handle: 0x0031
	Partition Row Position: Unknown
	Interleave Position: 1
	Interleaved Data Depth: 1

Handle 0x0033, DMI type 21, 7 bytes
Built-in Pointing Device
	Type: Touch Pad
	Interface: PS/2
	Buttons: 4

Handle 0x0034, DMI type 22, 26 bytes
Portable Battery
	Location: Fake
	Manufacturer: -Virtual Battery 0-
	Manufacture Date: 07/07/2010
	Serial Number: Battery 0
	Name: CRB Battery 0
	Chemistry: Lithium Ion
	Design Capacity: Unknown
	Design Voltage: Unknown
	SBDS Version: Not Specified
	Maximum Error: Unknown
	OEM-specific Information: 0x00000000

Handle 0x0035, DMI type 24, 5 bytes
Hardware Security
	Power-On Password Status: Disabled
	Keyboard Password Status: Disabled
	Administrator Password Status: Disabled
	Front Panel Reset Status: Disabled

Handle 0x0036, DMI type 26, 22 bytes
Voltage Probe
	Description: Voltage Probe Description.
	Location: Unknown
	Status: Unknown
	Maximum Value: Unknown
	Minimum Value: Unknown
	Resolution: Unknown
	Tolerance: Unknown
	Accuracy: Unknown
	OEM-specific Information: 0x00000000
	Nominal Value: Unknown

Handle 0x0037, DMI type 27, 15 bytes
Cooling Device
	Type: Fan
	Status: OK
	OEM-specific Information: 0x00000000
	Nominal Speed: 2000 rpm
	Description: Cooling Device Description.

Handle 0x0038, DMI type 32, 20 bytes
System Boot Information
	Status: No errors detected

Handle 0x0039, DMI type 39, 22 bytes
System Power Supply
	Location: OEM_Define0
	Name: OEM_Define1
	Manufacturer: OEM_Define2
	Serial Number: OEM_Define3
	Asset Tag: OEM_Define4
	Model Part Number: OEM_Define5
	Revision: OEM_Define6
	Max Power Capacity: 75 W
	Status: Present, OK
	Type: Regulator
	Input Voltage Range Switching: Auto-switch
	Plugged: No
	Hot Replaceable: No
	Cooling Device Handle: 0x0037

Handle 0x003A, DMI type 40, 18 bytes
Additional Information 1
	Referenced Handle: 0x001e
	Referenced Offset: 0x05
	String: PCIExpressx16
	Value: 0xaa
Additional Information 2
	Referenced Handle: 0x0000
	Referenced Offset: 0x05
	String: Compiler Version: VC 9.0
	Value: 0x05dc

Handle 0x003B, DMI type 41, 11 bytes
Onboard Device
	Reference Designation: Hanksville Gbe Lan Connection
	Type: Ethernet
	Status: Enabled
	Type Instance: 1
	Bus Address: 0000:00:00.1

Handle 0x003C, DMI type 128, 8 bytes
OEM-specific Type
	Header and Data:
		80 08 3C 00 55 AA 55 AA
	Strings:
		Oem Test 1
		Oem Test 2

Handle 0x003D, DMI type 133, 5 bytes
OEM-specific Type
	Header and Data:
		85 05 3D 00 01
	Strings:
		KHOIHGIUCCHHII

Handle 0x003E, DMI type 136, 6 bytes
OEM-specific Type
	Header and Data:
		88 06 3E 00 FF FF

Handle 0x003F, DMI type 200, 16 bytes
OEM-specific Type
	Header and Data:
		C8 10 3F 00 01 02 01 20 01 0F 01 3D B2 80 01 04
	Strings:
		IdeaPad
		20378

Handle 0x0040, DMI type 221, 12 bytes
OEM-specific Type
	Header and Data:
		DD 0C 40 00 01 01 00 01 06 02 00 00
	Strings:
		Reference Code - ACPI

Handle 0x0041, DMI type 127, 4 bytes
End Of Table

It would really be great if I can solve this issue so I don't have to restart just to get a monitor working.
Let me know if any other info might be useful

Last edited by ESBDB (2018-06-24 15:41:06)

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#2 2018-06-24 00:33:21

Xyne
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Registered: 2008-08-03
Posts: 6,963
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Re: [SOLVED] Laptop HDMI black screen when switching external monitors

Just to check that I have understood correctly, do you mean that the external monitor remains black but the laptop's screen remains active? And this only happens with one particular external monitor?

Does it make a difference if you deactivate the external monitor via xrandr before connecting it?

After a failed connection, can you reconnect to another external monitor?

Are there any error messages in dmesg?

Have you tried changing the cables? Maybe there is a loose connection. Does it always work when you reboot, without moving anything?

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#3 2018-06-24 06:40:24

ESBDB
Member
Registered: 2017-01-07
Posts: 10

Re: [SOLVED] Laptop HDMI black screen when switching external monitors

Hi Xyne, thanks for replying

Yes the external monitor remains black, the laptop's screen remains active and never has a problem. I've only got 2 external screens to test with. One at work and one at home. The one at home is the one I'm having trouble with.

After a failed connection I can't really test connecting to another external monitor as that would mean going to work again unfortunately. However rebooting to make it work at home and going to work the next day, the monitor at work has never had this problem. I also currently don't have other cables to try, but it always works when rebooting, without moving anything.

There are no errors in dmesg after a failed connection.

After a failed connection, deactivating the external monitor with xrandr --output HDMI-1 --off, turning it on again with xrandr --output HDMI-1 --auto made it work without rebooting which is progress big_smile.

Do you know which other logs I can check? Or other diagnostics I can do? I can make this work with xrandr, but would really like to try find out why this happens to make it work 100% correctly.

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#4 2018-06-24 14:38:00

Xyne
Administrator/PM
Registered: 2008-08-03
Posts: 6,963
Website

Re: [SOLVED] Laptop HDMI black screen when switching external monitors

ESBDB wrote:

Do you know which other logs I can check? Or other diagnostics I can do?

You can check the output of journalctl and the Xorg log under /var/log. If the connections are managed automatically, e.g. by a DE or WM, check the manager's logs too.

Try wiggling the cable when the monitor is correctly connected to see if there is a loose connection. Bring it to work and test it with another monitor if you can. Even if it's a hassle, it may save you hours of futile debugging and frustration.

Beyond that, keep tinkering and searching online for related connection problems with your specific graphics chip and driver, the monitor model, the cable setup, etc. If you have created Xorg configuration files under /etc/X11, check that they are necessary and correct. Check if there is anything that you can remove or add. Double-check that the graphics card is disabled and not interfering with anything. Reconsider taking the time to set it up properly (as the default driver, or via bumblebee).

Resolving graphics errors often feels like a journey into an overgrown jungle in the age of exploration with nothing but a machete and some vague idea of direction. You might find the long-lost temple if you're lucky or persistent enough, but you might come back empty-handed with dysentery. Good luck.

My Arch Linux Stuff • Forum Etiquette • Community Ethos - Arch is not for everyone

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#5 2018-06-24 15:40:36

ESBDB
Member
Registered: 2017-01-07
Posts: 10

Re: [SOLVED] Laptop HDMI black screen when switching external monitors

Awesome, thanks for the tips.

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