On 03/24/20 11:56, Alan Stern wrote: > On Tue, 24 Mar 2020, Qais Yousef wrote: > > > On 03/24/20 09:52, Alan Stern wrote: > > > On Tue, 24 Mar 2020, Qais Yousef wrote: > > > > > > > On 03/24/20 14:20, Oliver Neukum wrote: > > > > > Am Dienstag, den 24.03.2020, 10:46 +0000 schrieb Qais Yousef: > > > > > > > > > > > > I should have stuck to what I know then. I misread the documentation. Hopefully > > > > > > the attached looks better. I don't see the new debug you added emitted. > > > > > > > > > > That is odd. Please try > > > > > > > > > > echo "module usbcore +mfp" > /sys/kernel/debug/dynamic_debug/control > > > > > > > > > > with the attached improved patch. > > > > > > > > Hmm still no luck > > > > > > > > > > > > # history > > > > 0 echo "module usbcore +mfp" > /sys/kernel/debug/dynamic_debug/control > > > > 1 swapoff -a > > > > 2 echo suspend > /sys/power/disk > > > > 3 echo disk > /sys/power/state > > > > 4 dmesg > usb.dmesg > > > > > > What happens if you omit step 1 (the swapoff)? > > > > It seems to hibernate (suspend) successfully. If I omit that step I must setup > > a wakealarm to trigger the wakeup, but that's it. > > You don't have any other wakeup sources? Like a power button? Not sure if it's hooked correctly as a wakeup source. But as UK is now getting lockedown, I don't think I'll be seeing the board for a while and serial console is my only friend :-) I can hard reboot remotely reliably though. > > > I attached the dmesg; I didn't reboot the system in between. > > > > > > # history > > 0 echo "module usbcore +mfp" > /sys/kernel/debug/dynamic_debug/control > > 1 swapoff -a > > 2 echo suspend > /sys/power/disk > > 3 echo disk > /sys/power/state > > 4 dmesg > usb.dmesg > > 5 history > > 6 grep URB /sys/kernel/debug/dynamic_debug/control > > 7 grep "URB allocated" /sys/kernel/debug/dynamic_debug/control > > 8 swapon -a > > 9 echo +60 > /sys/class/rtc/rtc0/wakealarm > > 10 echo disk > /sys/power/state > > 11 dmesg > usb.dmesg > > This certainly reinforces the initial impression that the cause of the > warnings is a bug in the platform code. You should ask the appropriate > maintainer. The device-tree compatible node returns "generic-ohci". drivers/usb/host/ohci-platform.c returns you as the maintainer :-) > > However, an equally troubling question is why the usb2 bus never got > suspended in the first place. To solve that, you may need to enable > dynamic debugging in the Power Management core (i.e., "file > drivers/base/power/* +p"). Thanks Alan. I'll run with extra debug and send back. Cheers -- Qais Yousef
