On Thu, 2007-06-21 at 15:42 +0900, Mattia Dongili wrote: > On Wed, Jun 20, 2007 at 12:33:04PM -0400, Alan Stern wrote: > > On Wed, 20 Jun 2007, Mattia Dongili wrote: > > > > > > Just as with Raphael, I suggest you build a kernel with > > > > CONFIG_USB_DEBUG turned on and then post the dmesg log showing the USB > > > > debugging messages during the suspend and immediate resume. To reduce > > > > the amount of clutter you might want to rmmod uhci-hcd before starting > > > > the test. > > > > > > here we go: > > > http://www.linux.it/~malattia/logs/dmesg-suspend-ehci-debug-log > > > > > > and by the way: > > > 00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #1 (rev 02) > > > 00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #2 (rev 02) > > > 00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #3 (rev 02) > > > 00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI #4 (rev 02) > > > 00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02) > > > > > > with ehci only: > > > Bus 005 Device 007: ID 054c:0281 Sony Corp. > > > Bus 005 Device 004: ID 05ca:1830 Ricoh Co., Ltd > > > Bus 005 Device 001: ID 0000:0000 > > > > The log shows suspicious behavior on the part of the Sony UMH-U09 > > device, the first one in your ehci-only list above. When it was > > suspended it apparently disconnected itself from the USB bus, thereby > > triggering a wakeup signal. If at all possible, try unplugging the USB > > cable to that device and then see what happens when you suspend. > > wow, spotted! > > This device is an express card (SD/MMC reader). Do you have any > suggestion to make suspend work without any workarounds? > > I mean, all of this started by enabling wakeup on the ehci controller > USB1 S3 disabled pci:0000:00:1d.0 > USB2 S3 disabled pci:0000:00:1d.1 > USB3 S3 disabled pci:0000:00:1d.2 > USB4 S3 disabled pci:0000:00:1d.3 > USB7 S3 enabled pci:0000:00:1d.7 > > and this was triggered when trying to understand if enabling wakeup by > default on PCI devices was good or not (and the patch itself was > responsible or not for problems). > So, from my POV it's either not good or there has to be some way of > dealing with disconnecting devices on suspend. > Without this patch, users need to manually override /proc/acpi/wakeup to enable the wakeup ability of a given device. With this patch applied, /sys/.../power/wakeup is used to enable/disable device's wakeup ability, while they are all enabled by default. The change log of this patch is quite clear about this: http://marc.info/?l=linux-acpi&m=117580342513025&w=2 > Just to simplify, in this situation, if I had an usb mouse attached to > this usb controller and removed the mouse while suspended, would the > laptop wakeup? > If so that's not what I most probably want. :) > > > You also ought to be able to prevent this immediate resume by disabling > > wakeup on the EHCI controller. For example: > > > > echo disable >/sys/bus/usb/devices/usb5/power/wakeup > > echo disable >/sys/bus/usb/devices/usb5/../power/wakeup > that doesn't seem to work very well (on -rc5 at least): > $ echo disable > /sys/bus/usb/devices/usb2/power/wakeup > echo: write error: invalid argument > "$ echo disabled > /sys/bus/usb/devices/usb2/power/wakeup" should work. :) Thanks, Rui > The only value that seems to be accepted is 0 but reading the value > gives always "enabled". > > Thanks _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
