Any tips on getting the AOC-SHG3-4M2P to work?

General
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You got my curiosity.

Here are a few commands that I used to verify the card was recognized. You need to use sudo or run the command as root

dmidecode -t slot

Here is the output from my HL-15:

Getting SMBIOS data from sysfs.
SMBIOS 3.2.1 present.

Handle 0x000B, DMI type 9, 17 bytes
System Slot Information
	Designation: PCH SLOT2 PCI-E 3.0 X4(IN X8)
	Type: x4 PCI Express 3 x8
	Current Usage: Available
	Length: Short
	ID: 2
	Characteristics:
		3.3 V is provided
		Opening is shared
		PME signal is supported
	Bus Address: 0000:01:00.0

Handle 0x000C, DMI type 9, 17 bytes
System Slot Information
	Designation: CPU SLOT3 PCI-E 3.0 X8
	Type: x8 PCI Express 3 x8
	Current Usage: In Use
	Length: Short
	ID: 3
	Characteristics:
		3.3 V is provided
		Opening is shared
		PME signal is supported
	Bus Address: 0000:68:00.0

Handle 0x000D, DMI type 9, 17 bytes
System Slot Information
	Designation: CPU SLOT5 PCI-E 3.0 X8
	Type: x8 PCI Express 3 x8
	Current Usage: Available
	Length: Short
	ID: 5
	Characteristics:
		3.3 V is provided
		Opening is shared
		PME signal is supported
	Bus Address: 0000:ff:00.0

Handle 0x000E, DMI type 9, 17 bytes
System Slot Information
	Designation: CPU SLOT6 PCI-E 3.0 X16
	Type: x16 PCI Express 3 x16
	Current Usage: Available
	Length: Short
	ID: 6
	Characteristics:
		3.3 V is provided
		Opening is shared
		PME signal is supported
	Bus Address: 0000:ff:00.0

Handle 0x000F, DMI type 9, 17 bytes
System Slot Information
	Designation: M.2 PCI-E 3.0 X4
	Type: x4 M.2 Socket 3
	Current Usage: In Use
	Length: Short
	Characteristics:
		3.3 V is provided
		Opening is shared
		PME signal is supported
	Bus Address: 0000:04:00.0

As stated earlier, Slot 2, Slot 3, Slot 5, and Slot 6 are the only PCI slots available on the motherboard.

As I only have 1 PCI card installed wtihin my HL-15 via SLOT 3, you can see that the Current Usage denotes “In Use”. The output from the command also shares the Bus Address as 0000:68:00:0

The other slots have them marked as Available.

Using the Bus Address with this command:

lspci -s 0000:68:00.0

The output given was

68:00.0 PCI bridge: PLX Technology, Inc. PEX 8734 32-lane, 8-Port PCI Express Gen 3 (8.0GT/s) Switch (rev ab)

The same information PLX Technology, Inc is displayed in Cockpit/Houston, but the SLOT detail is not included.

I am hoping that helps you.

I can remove this carrier card and confirm that the Slot 3 will return to Available and the device PLX Technology, Inc will be removed from the lspci command.

I am going to use the same diagnostic process tonight as I install a PCI HBA controller as the card needs x8 PCI Gen 3.0 lane.

Hope these linux cli commands can provide you additional help

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