Re: Hotplug not working for USB 3.1 docking station on Dell XPS 13
On Wed, 2016-08-24 at 14:43 +0100, Richard van der Hoff wrote: > On 24/08/16 13:17, Oliver Neukum wrote: > > On Wed, 2016-08-24 at 11:27 +0100, Richard van der Hoff wrote: > >> I'm having problems with a Plugable USB-C docking station, with my > >> laptop, a Dell XPS 13 (9350). If the docking station is plugged in at > >> boot, it works correctly; however, when I hotplug it after boot, the > >> USB > >> devices are not detected until I force a rescan of the PCI bus. > >> > >> ... > > > > It looks like your initial diagnosis was correct. This is a PCI > > issue. > > Right. Do you happen to know if the bugzilla is the best place to pursue > it, or if there is an alternative mailing list? linux-...@vger.kernel.org HTH Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Hotplug not working for USB 3.1 docking station on Dell XPS 13
On 24/08/16 15:17, Oliver Neukum wrote: On Wed, 2016-08-24 at 14:43 +0100, Richard van der Hoff wrote: It looks like your initial diagnosis was correct. This is a PCI issue. Right. Do you happen to know if the bugzilla is the best place to pursue it, or if there is an alternative mailing list? linux-...@vger.kernel.org Thank you! -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Hotplug not working for USB 3.1 docking station on Dell XPS 13
On 24/08/16 13:17, Oliver Neukum wrote: On Wed, 2016-08-24 at 11:27 +0100, Richard van der Hoff wrote: I'm having problems with a Plugable USB-C docking station, with my laptop, a Dell XPS 13 (9350). If the docking station is plugged in at boot, it works correctly; however, when I hotplug it after boot, the USB devices are not detected until I force a rescan of the PCI bus. ... It looks like your initial diagnosis was correct. This is a PCI issue. Right. Do you happen to know if the bugzilla is the best place to pursue it, or if there is an alternative mailing list? What did you do at 814s after boot? Nothing, as far as I know. Possibly I switched to a text console? I don't *think* the error at that point is related. Please don't just add a log without comments if you do something. One cannot tell what happens in response to what. Noted. The comments at https://bugzilla.kernel.org/show_bug.cgi?id=151261#c3 were my best attempt at explaining what I'd done, but I appreciate they might be insufficient. Thanks for your help. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: Hotplug not working for USB 3.1 docking station on Dell XPS 13
On Wed, 2016-08-24 at 11:27 +0100, Richard van der Hoff wrote: > I'm having problems with a Plugable USB-C docking station, with my > laptop, a Dell XPS 13 (9350). If the docking station is plugged in at > boot, it works correctly; however, when I hotplug it after boot, the > USB > devices are not detected until I force a rescan of the PCI bus. > > I originally assumed this was a problem with the PCI subsystem, so > reported it at https://bugzilla.kernel.org/show_bug.cgi?id=151261, > but > was sent on from there to here. In any case, there are some dmesg > traces > and lspci logs attached to that bug. It looks like your initial diagnosis was correct. This is a PCI issue. What did you do at 814s after boot? Please don't just add a log without comments if you do something. One cannot tell what happens in response to what. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hotplug not working for USB 3.1 docking station on Dell XPS 13
Hi, I'm having problems with a Plugable USB-C docking station, with my laptop, a Dell XPS 13 (9350). If the docking station is plugged in at boot, it works correctly; however, when I hotplug it after boot, the USB devices are not detected until I force a rescan of the PCI bus. I originally assumed this was a problem with the PCI subsystem, so reported it at https://bugzilla.kernel.org/show_bug.cgi?id=151261, but was sent on from there to here. In any case, there are some dmesg traces and lspci logs attached to that bug. The lspci output suggests a chain of three PCI bridges (00:1c.0, 01:00.0, 02:02.0) before a PCI->USB bridge (05:00.0 or 39:00.0). If I boot without the docking station plugged in, 01:00.0 and beyond do not appear, and nor do they appear on hotplug. However, if I hotplug the docking station and then force a rescan with "echo 1 > /sys/bus/pci/devices/:00:1c.0/rescan", the PCI bridges and USB devices appear and spring into life. There are some ACPI errors in the dmesg at hotplug but they don't really mean much to me. I'd really appreciate any suggestions on how to proceed with this. Thanks Richard van der Hoff -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
