LM/PCIe Trouble Shooting - Revision history

Tacoball at 07:49, 3 September 2026

2026-09-03T07:49:29Z

← Older revision		Revision as of 07:49, 3 September 2026
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			== TODO ==

			<syntaxhighlight lang="bash">
			sudo dmesg \| grep -i -E "pci.downgraded\|pci.failed\|pci.*speed"
			sudo nano /etc/default/grub
			GRUB_CMDLINE_LINUX_DEFAULT="quiet splash pci=realloc"
			sudo update-grub && sudo reboot
			</syntaxhighlight>

	== List all GPUs ==		== List all GPUs ==

Tacoball: /* List PCIe tree for CPU & chipset */

2026-09-03T07:43:16Z

List PCIe tree for CPU & chipset

← Older revision		Revision as of 07:43, 3 September 2026
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	== List PCIe tree for CPU & chipset ==		== List PCIe tree for CPU & chipset ==

			<syntaxhighlight lang="bash">
			sudo lspci -PPvv \| grep -E '^0\|LnkCap:\|LnkSta:'
			</syntaxhighlight>

			<pre>
			00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Dummy Host Bridge 15:41 [62/9069]
			00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Dummy Host Bridge
			00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Dummy Host Bridge
			00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Internal GPP Bridge to Bus [C:A] (prog-if 00 [Normal decode])
			LnkCap: Port #0, Speed 16GT/s, Width x16, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
			LnkSta: Speed 16GT/s, Width x16
			00:08.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Internal GPP Bridge to Bus [C:A] (prog-if 00 [Normal decode])
			LnkCap: Port #0, Speed 16GT/s, Width x16, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
			LnkSta: Speed 16GT/s, Width x16
			00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 71)
			00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
			00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 0
			00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 1
			00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 2
			00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 3
			00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 4
			00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 5
			00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 6
			00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Data Fabric; Function 7
			00:01.1/01:00.0 PCI bridge: Intel Corporation Device e2ff (rev 01) (prog-if 00 [Normal decode])
			LnkCap: Port #0, Speed 16GT/s, Width x16, ASPM L1, Exit Latency L1 <32us
			LnkSta: Speed 16GT/s, Width x8 (downgraded)
			00:01.1/01:00.0/02:01.0 PCI bridge: Intel Corporation Device e2f0 (prog-if 00 [Normal decode])
			LnkCap: Port #8, Speed 2.5GT/s, Width x1, ASPM L1, Exit Latency L1 <1us
			LnkSta: Speed 2.5GT/s, Width x1
			00:01.1/01:00.0/02:02.0 PCI bridge: Intel Corporation Device e2f1 (prog-if 00 [Normal decode])
			LnkCap: Port #8, Speed 2.5GT/s, Width x1, ASPM L1, Exit Latency L1 <1us
			LnkSta: Speed 2.5GT/s, Width x1
			00:01.1/01:00.0/02:01.0/03:00.0 VGA compatible controller: Intel Corporation Battlemage G31 [Intel Graphics] (prog-if 00 [VGA controller])
			LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
			LnkSta: Speed 2.5GT/s, Width x1
			00:01.1/01:00.0/02:02.0/04:00.0 Audio device: Intel Corporation Device e2f7 (prog-if 00 [HDA compatible])
			LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <64ns, L1 <1us
			LnkSta: Speed 2.5GT/s, Width x1
			</pre>

	<syntaxhighlight lang="bash">		<syntaxhighlight lang="bash">

Tacoball at 03:11, 3 September 2026

2026-09-03T03:11:14Z

@@ Line 39: / Line 39: @@
 cat /sys/bus/pci/devices/0000:03:00.0/max_link_width
 cat /sys/bus/pci/devices/0000:03:00.0/max_link_speed
 </syntaxhighlight>

Tacoball: /* Verify link speed & width */

2026-09-03T03:02:28Z

Verify link speed & width

← Older revision		Revision as of 03:02, 3 September 2026
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	cat /sys/bus/pci/devices/0000:03:00.0/current_link_width		cat /sys/bus/pci/devices/0000:03:00.0/current_link_width
	cat /sys/bus/pci/devices/0000:03:00.0/current_link_speed		cat /sys/bus/pci/devices/0000:03:00.0/current_link_speed

			cat /sys/bus/pci/devices/0000:03:00.0/max_link_width
			cat /sys/bus/pci/devices/0000:03:00.0/max_link_speed
	</syntaxhighlight>		</syntaxhighlight>

Tacoball: /* Verify link speed & width */

2026-09-03T03:01:24Z

Verify link speed & width

← Older revision		Revision as of 03:01, 3 September 2026
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	<syntaxhighlight lang="bash">		<syntaxhighlight lang="bash">
	sudo lspci -vvv -s 03:00 \| grep 'Lnk'		sudo lspci -vvv -s 03:00 \| grep 'Lnk'

			cat /sys/bus/pci/devices/0000:03:00.0/current_link_width
			cat /sys/bus/pci/devices/0000:03:00.0/current_link_speed
	</syntaxhighlight>		</syntaxhighlight>

Tacoball at 02:57, 3 September 2026

2026-09-03T02:57:41Z

← Older revision		Revision as of 02:57, 3 September 2026
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	\| \-0d.0-[0e]----00.0 Advanced Micro Devices, Inc. [AMD] 600 Series Chipset SATA Controller		\| \-0d.0-[0e]----00.0 Advanced Micro Devices, Inc. [AMD] 600 Series Chipset SATA Controller
	</pre>		</pre>

			== Verify link speed & width ==

			<syntaxhighlight lang="bash">
			sudo lspci -vvv -s 03:00 \| grep 'Lnk'
			</syntaxhighlight>

Tacoball at 02:53, 3 September 2026

2026-09-03T02:53:05Z

← Older revision		Revision as of 02:53, 3 September 2026
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			== List all GPUs ==

			<syntaxhighlight lang="bash">
			lspci \| grep 'VGA'
			</syntaxhighlight>

	== List PCIe tree for CPU & chipset ==		== List PCIe tree for CPU & chipset ==

Tacoball: /* List PCIe tree for CPU & chipset */

2026-09-03T02:52:11Z

List PCIe tree for CPU & chipset

← Older revision		Revision as of 02:52, 3 September 2026
Line 5:		Line 5:
	</syntaxhighlight>		</syntaxhighlight>

			<pre>
	-[0000:00]-+-00.0 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Root Complex		-[0000:00]-+-00.0 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Root Complex
	+-00.2 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge IOMMU		+-00.2 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge IOMMU

Tacoball at 02:51, 3 September 2026

2026-09-03T02:51:58Z

← Older revision		Revision as of 02:51, 3 September 2026
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	~~{\| class~~=~~"wikitable"~~		== List PCIe tree for CPU & chipset ==
	~~! \|\| \|\|~~
	\|-		<syntaxhighlight lang="bash">
	\|
	\| <syntaxhighlight lang="bash">
	lspci -tv \| sed '/+-03\.0/,$d'		lspci -tv \| sed '/+-03\.0/,$d'
	</syntaxhighlight>		</syntaxhighlight>
	~~\| <pre>~~
	-[0000:00]-+-00.0 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Root Complex		-[0000:00]-+-00.0 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge Root Complex
	+-00.2 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge IOMMU		+-00.2 Advanced Micro Devices, Inc. [AMD] Raphael/Granite Ridge IOMMU
Line 23:		Line 21:
	\| \-0d.0-[0e]----00.0 Advanced Micro Devices, Inc. [AMD] 600 Series Chipset SATA Controller		\| \-0d.0-[0e]----00.0 Advanced Micro Devices, Inc. [AMD] 600 Series Chipset SATA Controller
	</pre>		</pre>
	\|}

Tacoball at 02:51, 3 September 2026

2026-09-03T02:51:01Z

@@ Line 1: / Line 1: @@
 {| class="wikitable"
-! ||
+! || ||
 |-
+|
@@ Line 6: / Line 6: @@
 lspci -tv | sed '/+-03\.0/,$d'
 </syntaxhighlight>
 |}