Subject: Re: [Bugme-new] [Bug 9721] New: wake on lan fails with sky2 module

From: supersud501 <[email-masked]>
Date: Fri, 11 Jan 2008 21:23:32 +0100

Stephen Hemminger wrote:
> On Wed, 9 Jan 2008 16:03:00 -0800
> Andrew Morton <[email-masked]> wrote:
> 
>> (switched to email.  Please respond via emailed reply-to-all, not via the
>> bugzilla web interface).
>>
>> On Wed,  9 Jan 2008 13:05:34 -0800 (PST)
>> [email-masked] wrote:
>>
>>> http://bugzilla.kernel.org/show_bug.cgi?id=9721
>>>
>>>            Summary: wake on lan fails with sky2 module
>>>            Product: ACPI
>>>            Version: 2.5
>>>      KernelVersion: 2.6.24-rc7
>>>           Platform: All
>>>         OS/Version: Linux
>>>               Tree: Mainline
>>>             Status: NEW
>>>           Severity: normal
>>>           Priority: P1
>>>          Component: Power-Sleep-Wake
>>>         AssignedTo: [email-masked]
>>>         ReportedBy: [email-masked]
>> This post-2.6.23 regression was assigned to ACPI but is quite possibly a
>> net driver problem?
>>
>>> Latest working kernel version: 2.6.23.12
>>> Earliest failing kernel version: 2.6.24-rc6 (not tested earlier kernel,
>>> 2.6.24-rc7 still failing)
>>> Distribution: Ubuntu 8.04 (but Kernel build from Kernel.org and system modifiet
>>> to make wake on lan work, i.e. network cards are not shutted down on poweroff)
>>> Hardware Environment: Marvell Technology Group Ltd. 88E8053 PCI-E Gigabit
>>> Ethernet Controller (rev 20) onboard Asus P5W DH motherboard, uses module SKY2
>>> Software Environment:
>>> Problem Description:
>>>
>>> When enabling wake on lan with: 'ethtool -s eth0 wol' i get the following
>>> status:
>>>
>>> 21:56:29 ~ # sudo ethtool eth0
>>> Settings for eth0:
>>>         Supported ports: [ TP ]
>>>         Supported link modes:   10baseT/Half 10baseT/Full 
>>>                                 100baseT/Half 100baseT/Full 
>>>                                 1000baseT/Half 1000baseT/Full 
>>>         Supports auto-negotiation: Yes
>>>         Advertised link modes:  10baseT/Half 10baseT/Full 
>>>                                 100baseT/Half 100baseT/Full 
>>>                                 1000baseT/Half 1000baseT/Full 
>>>         Advertised auto-negotiation: Yes
>>>         Speed: 100Mb/s
>>>         Duplex: Full
>>>         Port: Twisted Pair
>>>         PHYAD: 0
>>>         Transceiver: internal
>>>         Auto-negotiation: on
>>>         Supports Wake-on: pg
>>>         Wake-on: g    <---- wol enabled
>>>         Current message level: 0x000000ff (255)
>>>         Link detected: yes
>>>
>>> but after shutting down the pc doesn't wake up when magic packet is sent.
>>>
>>> the status lights of the network card are still on (so the card seems to be
>>> online).
>>>
>>> same system with only changed kernel to 2.6.23.12 and same procedure like
>>> above: wake on lan works.
>>>
>>> Steps to reproduce: enable wol on your network card using SKY2 module and it
>>> doesn't work too?
>>>
>>> if you need more information, just tell me, it's my first bug report.
>>> regards
>>>
> 
> 
> Wake from power off works on 2.6.24-rc7 for me.
> Wake from suspend doesn't because Network Manager, HAL, or some other
> user space tool gets confused.
> 
> I just rechecked it with Fujitsu Lifebook, which has sky2 (88E8055).
> There many variations of this chip, and it maybe chip specific problem
> or ACPI/BIOS issues.  If you don't enable Wake on Lan in BIOS, the
> driver can't do it for you. Also, check how you are shutting down.
> 
> Also since the device has to restart the PHY, it could be a switch
> issue if you have some fancy pants switch doing intrusion detection
> or something, but I doubt that.
> 
> Is it a clean or fast shutdown, most distributions mark network
> devices as down on shutdown, but if the distribution does something 
> stupid like remove the driver module, then the driver is unable to setup Wake On Lan.
> The wake on lan setup is done in one place in the driver, add
> a printk to see if it is ever called.
> 
> 

I tried ACPI wakeup with /proc/acpi/alarm (like i described in my last 
mail) and it worked... so ACPI wakeup seems to work.

i'll try to do the printk-thing when i find some time to mess around 
with the sources (maybe tomorrow). if someone has some brief 
instructions (maybe a link to a helpfull site for kernel debugging) for 
me i would be thankfull and could provide some more info faster.

some steps for me to identify the source of the problem (is it really 
sky2?) would be really helpfull...