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ghedeon

Member

Registered: 2016-02-20

Posts: 15

Dell XPS 9550. Flaky Ethernet USB-C dongle detection.

Hi,

I'm using USB-C Ethernet adapter, which works just fine until the first unplug.  Meaning that, it works on every system start, then unplug & plug it back and it's gone. Tested on Windows - no issues, so I assume the adapter itself is functional. When it's recognized properly, these lspci entries are present:

...
06:00.0 PCI bridge: Intel Corporation Device 1576
07:00.0 PCI bridge: Intel Corporation Device 1576
07:01.0 PCI bridge: Intel Corporation Device 1576
07:02.0 PCI bridge: Intel Corporation Device 1576
3e:00.0 USB controller: Intel Corporation Device 15b5

and when you unplug & plug it back - the PCI bridge and USB controller are not detected anymore. Seems to be something with USB-C support, not sure... I'm using 4.4.1-2 kernel.

diraimondo

Member

Registered: 2014-03-28

Posts: 61

Re: Dell XPS 9550. Flaky Ethernet USB-C dongle detection.

You could try with the following command as root:

echo 1 > /sys/class/pci_bus/0000\:00/rescan

It should force the rescan of the pci bus. It was reported to work on an XPS 13.

Last edited by diraimondo (2016-02-23 16:45:10)

ghedeon

Member

Registered: 2016-02-20

Posts: 15

Re: Dell XPS 9550. Flaky Ethernet USB-C dongle detection.

You could try with the following command as root:

echo 1 > /sys/class/pci_bus/0000\:00/rescan

Nothing, unfortunately.