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Date: Wed, 30 Mar 2011 16:11:17 +0200
From: Jiri Slaby <jirislaby@...il.com>
To: Alan Stern <stern@...land.harvard.edu>
CC: "Rafael J. Wysocki" <rjw@...e.com>, akpm@...ux-foundation.org,
linux-kernel@...r.kernel.org,
Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: [linux-pm] Resume hangs [was: mmotm 2010-12-02-16-34 uploaded]
On 02/22/2011 04:36 PM, Alan Stern wrote:
> On Tue, 22 Feb 2011, Jiri Slaby wrote:
>
>> On 02/04/2011 08:33 PM, Alan Stern wrote:
>>> On Fri, 4 Feb 2011, Jiri Slaby wrote:
>>>
>>>>>> It seems to suffice... No hangs still. Should I enable pm_async back
>>>>>> again to confirm the issue is still present?
>>>>>
>>>>> Yes, please, it would be good to know for sure.
>>>>
>>>> Ok, confirmed right now :).
>>>>
>>>> I disabled pm_async for USB again. What do you suggest next?
>>>
>>> What happens if you leave pm_async enabled but unplug all the USB
>>> devices before suspending? If there are any USB devices you can't
>>> unplug, you can get an equivalent result by unconfiguring the root
>>> hubs:
>>>
>>> for a in /sys/bus/usb/devices/usb* ; do
>>> echo 0 >$a/bConfigurationValue
>>> done
>>
>> This doesn't seem to help. The hang happened 3 times during the 2 weeks.
>>
>> I have /etc/pm/sleep.d/99usb-debug with:
>> #!/bin/bash
>>
>> send() {
>> for a in /sys/bus/usb/devices/usb* ; do
>> echo $1 >$a/bConfigurationValue
>> done
>> }
>>
>> case "$1" in
>> hibernate|suspend)
>> send 0
>> ;;
>> thaw|resume)
>> send 1
>> ;;
>> *)
>> ;;
>> esac
>>
>> exit 0
>>
>> And it indeed properly enable/disable usb before/after suspend.
>
> Strange indeed. It's worth noting that the async stuff affects only
> the normal suspend and resume operations, not the late-suspend and
> early-resume operations. This means that it all likelihood, the system
> crashes either before finishing the suspend or after doing a fair
> amount of the resume. And yet that's not consistent with what you see
> on the screen.
>
> By the way, are you booting with no_console_suspend? And do you do
> "echo 8 >/proc/sys/kernel/printk" (or equivalently, Alt-SysRq-8) before
> suspending?
I'm testing this on my desktop. I found out yesterday, that I had async
completely disabled. So I have no output yet.
I took my dvb-t tuner from desktop and connected it to my notebook. And
got a similar hang during resume right now. It may not be related
though. The trace is:
s2disk D 0000000000000000 0 6125 5902 0x00000004
ffff8800797aba78 0000000000000082 ffff8800797ab9f8 0000000000012ac0
ffff8800797abfd8 0000000000012ac0 ffff8800797abfd8 ffff8800797abfd8
ffff8800777fe7f0 0000000000012ac0 0000000000012ac0 ffff8800797aa000
Call Trace:
[<ffffffff8151e2ed>] schedule_timeout+0x28d/0x310
[<ffffffff8151d410>] wait_for_common+0xc0/0x150
[<ffffffff8133ad22>] _request_firmware+0x132/0x270
[<ffffffffa06df2c7>] dvb_usb_download_firmware+0x37/0xf0 [dvb_usb]
[<ffffffffa06dfbe5>] dvb_usb_device_init+0x165/0x1b0 [dvb_usb]
[<ffffffffa06d6c27>] af9015_usb_probe+0x87/0xa0 [dvb_usb_af9015]
[<ffffffff8138d9d2>] usb_probe_interface+0x142/0x270
[<ffffffff8132f3c0>] really_probe+0x70/0x220
[<ffffffff8132f757>] driver_probe_device+0x47/0xa0
[<ffffffff8132e19c>] bus_for_each_drv+0x5c/0x90
[<ffffffff8132f62f>] device_attach+0x8f/0xb0
[<ffffffff8138d5b0>] usb_rebind_intf+0x60/0xa0
[<ffffffff8138d6c7>] do_unbind_rebind+0x77/0xb0
[<ffffffff8138d76b>] usb_resume+0x6b/0xb0
[<ffffffff8137f96b>] usb_dev_complete+0xb/0x10
[<ffffffff81334d1e>] device_complete+0x8e/0xe0
[<ffffffff81335da1>] dpm_resume_end+0xa1/0x120
[<ffffffff8109d890>] hibernation_snapshot+0xc0/0x120
[<ffffffff810a1cde>] snapshot_ioctl+0x3ae/0x590
[<ffffffff81169794>] do_vfs_ioctl+0x84/0x2f0
[<ffffffff81169a98>] sys_ioctl+0x98/0xa0
[<ffffffff81002ed2>] system_call_fastpath+0x16/0x1b
[<00007fe6c82f8ce7>] 0x7fe6c82f8ce7
The firmware request should time out. I think I waited for longer than
60 s before when I saw the hangs on the desktop, But do you have an idea
why it doesn't load the FW immediately?
The device is:
Bus 001 Device 010: ID 0413:6029 Leadtek Research, Inc. WinFast DTV
Dongle Gold
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0413 Leadtek Research, Inc.
idProduct 0x6029 WinFast DTV Dongle Gold
bcdDevice 2.00
iManufacturer 1 Leadtek
iProduct 2 WinFast DTV Dongle Gold
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 71
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 1 Keyboard
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.01
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 65
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 16
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
thanks,
--
js
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