On Wed, Sep 04, 2024 at 12:38:15PM -0500, Mario Limonciello wrote: > ❯ ls -l /sys/bus/pci/drivers/thunderbolt/*/consumer* > lrwxrwxrwx 1 root root 0 Sep 4 12:33 > /sys/bus/pci/drivers/thunderbolt/0000:c4:00.5/consumer:pci:0000:00:03.1 -> > ../../../virtual/devlink/pci:0000:c4:00.5--pci:0000:00:03.1/ > lrwxrwxrwx 1 root root 0 Sep 4 12:33 > /sys/bus/pci/drivers/thunderbolt/0000:c4:00.6/consumer:pci:0000:00:04.1 -> > ../../../virtual/devlink/pci:0000:c4:00.6--pci:0000:00:04.1/ > ❯ cat /sys/bus/pci/drivers/thunderbolt/*/power/runtime_status > suspended > active > > I would have expected the USB4 host router to go back into runtime PM, but > it doesn't anymore until I reboot the system. Yes, it should enter runtime suspend after a while. Would you mind sharing dmesg around this? I tried on my system and it works as expected (the device-power.sh is internal script that dumps the device power states, I can share if you want). Devices 0d.2/3 are the host routers. 07.[0-3] are the PCIe tunnels (not really used here but shown for completeness, I don't have PCIe tunnel enabled to the hub). 0d.0 is the xHCI controller. Plug in USB4 hub ---------------- # device-power.sh -s All PCI devices (software state) ... 0000:00:07.0 8086:7ec4 Status: [D3cold] Real status: [ D0] Runtime PM: [suspended] 0000:00:07.1 8086:7ec5 Status: [D3cold] Real status: [ D0] Runtime PM: [suspended] 0000:00:07.2 8086:7ec6 Status: [D3cold] Real status: [ D0] Runtime PM: [suspended] 0000:00:07.3 8086:7ec7 Status: [D3cold] Real status: [ D0] Runtime PM: [suspended] ... 0000:00:0d.0 8086:7ec0 Status: [D3cold] Real status: [ D0] Runtime PM: [suspended] 0000:00:0d.2 8086:7ec2 Status: [ D0] Real status: [ D0] Runtime PM: [ active] 0000:00:0d.3 8086:7ec3 Status: [ D0] Real status: [ D0] Runtime PM: [ active] Unplug and wait for the autosuspend_delay ----------------------------------------- # device-power.sh -s All PCI devices (software state) ... 0000:00:07.0 8086:7ec4 Status: [D3cold] Real status: [D3cold] Runtime PM: [suspended] 0000:00:07.1 8086:7ec5 Status: [D3cold] Real status: [D3cold] Runtime PM: [suspended] 0000:00:07.2 8086:7ec6 Status: [D3cold] Real status: [D3cold] Runtime PM: [suspended] 0000:00:07.3 8086:7ec7 Status: [D3cold] Real status: [D3cold] Runtime PM: [suspended] ... 0000:00:0d.0 8086:7ec0 Status: [D3cold] Real status: [D3cold] Runtime PM: [suspended] 0000:00:0d.2 8086:7ec2 Status: [D3cold] Real status: [D3cold] Runtime PM: [suspended] 0000:00:0d.3 8086:7ec3 Status: [D3cold] Real status: [D3cold] Runtime PM: [suspended]
