Dear Linux folks,
I noticed on the Dell XPS 13 9360 some devices do not have power
management enabled by default. From PowerTOP:
Bad Runtime PM for PCI Device Intel Corporation
Sunrise Point-LP PCI Express Root Port #1
Bad Runtime PM for PCI Device Intel Corporation Sunrise
Point-LP LPC Controller
These are the two devices below:
1. 00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI
Express Root Port #1 [8086:9d10] (rev f1)
2. 00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC
Controller [8086:9d58] (rev 21)
$ sudo dmesg | grep -e 9d10 -e 9d58
[ 0.200876] pci 0000:00:1c.0: [8086:9d10] type 01 class 0x060400
PCIe Root Port
[ 0.202637] pci 0000:00:1f.0: [8086:9d58] type 00 class 0x060100
conventional PCI endpoi
Is that a decision made by the system manufacturer or should the Linux
kernel enable power management by default?
Kind regards,
Paul
$ lspci -tvnn
-[0000:00]-+-00.0 Intel Corporation Xeon E3-1200 v6/7th Gen Core
Processor Host Bridge/DRAM Registers [8086:5904]
+-02.0 Intel Corporation HD Graphics 620 [8086:5916]
+-04.0 Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen
Core Processor Thermal Subsystem [8086:1903]
+-14.0 Intel Corporation Sunrise Point-LP USB 3.0 xHCI
Controller [8086:9d2f]
+-14.2 Intel Corporation Sunrise Point-LP Thermal subsystem
[8086:9d31]
+-15.0 Intel Corporation Sunrise Point-LP Serial IO I2C
Controller #0 [8086:9d60]
+-15.1 Intel Corporation Sunrise Point-LP Serial IO I2C
Controller #1 [8086:9d61]
+-16.0 Intel Corporation Sunrise Point-LP CSME HECI #1
[8086:9d3a]
+-1c.0-[01-39]----00.0-[02-39]--+-00.0-[03]--
| +-01.0-[04-38]--
| \-02.0-[39]----00.0 Intel
Corporation DSL6340 USB 3.1 Controller [Alpine Ridge] [8086:15b5]
+-1c.4-[3a]----00.0 Qualcomm Atheros QCA6174 802.11ac
Wireless Network Adapter [168c:003e]
+-1d.0-[3b]----00.0 SK hynix PC300 NVMe Solid State Drive
512GB [1c5c:1284]
+-1f.0 Intel Corporation Sunrise Point-LP LPC Controller
[8086:9d58]
+-1f.2 Intel Corporation Sunrise Point-LP PMC [8086:9d21]
+-1f.3 Intel Corporation Sunrise Point-LP HD Audio [8086:9d71]
\-1f.4 Intel Corporation Sunrise Point-LP SMBus [8086:9d23]
$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v6/7th Gen
Core Processor Host Bridge/DRAM Registers [8086:5904] (rev 02)
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics
620 [8086:5916] (rev 02)
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon
E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem
[8086:1903] (rev 02)
00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB
3.0 xHCI Controller [8086:9d2f] (rev 21)
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise
Point-LP Thermal subsystem [8086:9d31] (rev 21)
00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise
Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise
Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
00:16.0 Communication controller [0780]: Intel Corporation Sunrise
Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI
Express Root Port #1 [8086:9d10] (rev f1)
00:1c.4 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI
Express Root Port #5 [8086:9d14] (rev f1)
00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI
Express Root Port #9 [8086:9d18] (rev f1)
00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC
Controller [8086:9d58] (rev 21)
00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC
[8086:9d21] (rev 21)
00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio
[8086:9d71] (rev 21)
00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-LP SMBus
[8086:9d23] (rev 21)
01:00.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3
Bridge [Alpine Ridge 2C 2015] [8086:1576]
02:00.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3
Bridge [Alpine Ridge 2C 2015] [8086:1576]
02:01.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3
Bridge [Alpine Ridge 2C 2015] [8086:1576]
02:02.0 PCI bridge [0604]: Intel Corporation DSL6340 Thunderbolt 3
Bridge [Alpine Ridge 2C 2015] [8086:1576]
39:00.0 USB controller [0c03]: Intel Corporation DSL6340 USB 3.1
Controller [Alpine Ridge] [8086:15b5]
3a:00.0 Network controller [0280]: Qualcomm Atheros QCA6174 802.11ac
Wireless Network Adapter [168c:003e] (rev 32)
3b:00.0 Non-Volatile memory controller [0108]: SK hynix PC300 NVMe Solid
State Drive 512GB [1c5c:1284]
