Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> writes: > On Mon, 23 Jul 2012, Bjørn Mork wrote: > >> Hello, >> >> I have no idea where to start debugging this. But USB hotplug does not >> seem to work at all in linux-next if autosuspend is enabled. >> >> I am running next-20120723 with this: >> >> nemi:/tmp# grep . /sys/bus/usb/devices/usb*/power/control >> /sys/bus/usb/devices/usb1/power/control:auto >> /sys/bus/usb/devices/usb2/power/control:auto >> /sys/bus/usb/devices/usb3/power/control:auto >> /sys/bus/usb/devices/usb4/power/control:auto >> /sys/bus/usb/devices/usb5/power/control:auto >> /sys/bus/usb/devices/usb6/power/control:auto >> /sys/bus/usb/devices/usb7/power/control:auto >> /sys/bus/usb/devices/usb8/power/control:auto >> >> >> Connecting a device to any port, whether it is external or internal >> (using rfkill to "connect") has no effect. Nothing in the log. No >> uevent. >> >> Setting control to "on" on a port will reenable hotplug on that port. >> Any device connected while in "auto" state will suddenly be discovered. > > This sounds like a bug in the host controller driver. What HCDs are > you using? Does the host controller also get suspended? uhci_hcd + ehci_hcd. Really standard intel based laptop from 2008/2009: bjorn@nemi:~$ lspci -nn 00:00.0 Host bridge [0600]: Intel Corporation Mobile 4 Series Chipset Memory Controller Hub [8086:2a40] (rev 07) 00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a42] (rev 07) 00:02.1 Display controller [0380]: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller [8086:2a43] (rev 07) 00:03.0 Communication controller [0780]: Intel Corporation Mobile 4 Series Chipset MEI Controller [8086:2a44] (rev 07) 00:19.0 Ethernet controller [0200]: Intel Corporation 82567LM Gigabit Network Connection [8086:10f5] (rev 03) 00:1a.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #4 [8086:2937] (rev 03) 00:1a.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #5 [8086:2938] (rev 03) 00:1a.2 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #6 [8086:2939] (rev 03) 00:1a.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #2 [8086:293c] (rev 03) 00:1b.0 Audio device [0403]: Intel Corporation 82801I (ICH9 Family) HD Audio Controller [8086:293e] (rev 03) 00:1c.0 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 1 [8086:2940] (rev 03) 00:1c.1 PCI bridge [0604]: Intel Corporation 82801I (ICH9 Family) PCI Express Port 2 [8086:2942] (rev 03) 00:1d.0 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #1 [8086:2934] (rev 03) 00:1d.1 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #2 [8086:2935] (rev 03) 00:1d.2 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB UHCI Controller #3 [8086:2936] (rev 03) 00:1d.7 USB controller [0c03]: Intel Corporation 82801I (ICH9 Family) USB2 EHCI Controller #1 [8086:293a] (rev 03) 00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev 93) 00:1f.0 ISA bridge [0601]: Intel Corporation ICH9M-E LPC Interface Controller [8086:2917] (rev 03) 00:1f.2 SATA controller [0106]: Intel Corporation 82801IBM/IEM (ICH9M/ICH9M-E) 4 port SATA Controller [AHCI mode] [8086:2929] (rev 03) 00:1f.3 SMBus [0c05]: Intel Corporation 82801I (ICH9 Family) SMBus Controller [8086:2930] (rev 03) 03:00.0 Network controller [0280]: Intel Corporation Ultimate N WiFi Link 5300 [8086:4236] Is this indicating host controller suspend? If so, then yes: Jul 23 23:27:39 nemi kernel: [ 1334.680513] uhci_hcd 0000:00:1a.2: power state changed by ACPI to D3 Jul 23 23:27:39 nemi kernel: [ 1334.695357] uhci_hcd 0000:00:1d.0: power state changed by ACPI to D3 Jul 23 23:27:41 nemi kernel: [ 1336.824658] uhci_hcd 0000:00:1a.0: power state changed by ACPI to D3 Jul 23 23:27:42 nemi kernel: [ 1336.856298] ehci_hcd 0000:00:1d.7: power state changed by ACPI to D3 Jul 23 23:27:42 nemi kernel: [ 1336.856350] ehci_hcd 0000:00:1a.7: power state changed by ACPI to D3 Bjørn -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
