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

From: "Rafael J. Wysocki" <[email-masked]>
Date: Fri, 11 Jan 2008 22:16:08 +0100

> http://bugzilla.kernel.org/show_bug.cgi?id=9721

On Friday, 11 of January 2008, supersud501 wrote:
> 
> 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...

Please do the tests requested at:
http://bugzilla.kernel.org/show_bug.cgi?id=9721#c2,
thanks.