On Tue, 20 Apr 2010, Sriram V wrote: > Hi, > Thanks for the response. We tried to add a Quirk for root hub and > Power Cycle & reset the PHY in suspend-resume. > > > There are my observations: > 1) Some times - suspend-resume works. (Say the 4/10 times) without > re-enumeration of the > device. > 2) The rest of the times, The device re-enumerates. > Whenever the device re-enumerates - I see lots of "unable to > enumerate USB device on port 1" and finally the device > re-enumerates. > > > Please advice. Please redo the test with CONFIG_PRINTK_TIME enabled. Also run usbmon (for the 1u device file) during the test. Instructions for usbmon are in Documentation/usb/usbmon.txt. You don't have to post the dmesg log or the usbmon trace for a suspend/resume cycle where everything works. Just show a test where the 1-2.1 device gets disconnected. Here's where the problem occurs: > usb 1-2.1: reset-resume > hub 1-2:1.0: logical disconnect on port 1 > pm_op(): usb_dev_resume+0x0/0x18 returns -19 But this log doesn't show the reason for the logical disconnect. Alan Stern -- 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
