Bug 1557

Summary:	resuming from S1 will hang, if CONFIG_USB_EHCI_HCD get configured.
Product:	ACPI	Reporter:	Luming Yu (luming.yu)
Component:	Power-Sleep-Wake	Assignee:	Luming Yu (luming.yu)
Status:	CLOSED PATCH_ALREADY_AVAILABLE
Severity:	normal	CC:	acpi-bugzilla
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.0-test9	Subsystem:
Regression:	---	Bisected commit-id:
Attachments:	a patch for fixing this issue

Description Luming Yu 2003-11-18 22:31:03 UTC

Distribution:
RH

Hardware Environment:
ASUS M2400 laptop

Software Environment:
2.6.0-test9

Problem Description:
If CONFIG_USB_EHCI_HCD get configured, "echo -n 1 > /proc/acpi/sleep" can work,
but resuming from S1 will hang 

Steps to reproduce:
echo -n 1 > /proc/acpi/sleep, then press power button
hang after message below:
PCI: Setting latency timer of device 0000:00:1d.2 to 64
ehci_hcd 0000:00:1d.7: resume from state D0

Comment 1 Luming Yu 2003-11-18 22:34:39 UTC

Created attachment 1473 [details]
a patch for fixing this issue

We need check whether the device has PM capability, before we actually do PM
work.

Comment 2 Len Brown 2004-05-04 07:45:32 UTC

i see that gregkh accepted this fix into 2.6.6 april 22.  closing.

Comment 3 David Brownell 2004-05-06 19:42:09 UTC

Note that this patch is just a bandage.  There are some issues in 
the generic usbcore PCI code, and also in EHCI's suspend/resume. 
When those get fixed, this patch will likely get removed.