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

Stephen Hemminger wrote:

On Wed, 9 Jan 2008 16:03:00 -0800
Andrew Morton [off-list ref] wrote:

quoted

(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)
bugme-daemon@bugzilla.kernel.org wrote:

quoted

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: acpi_power-sleep-wake@kernel-bugs.osdl.org
        ReportedBy: supersud501@yahoo.de

This post-2.6.23 regression was assigned to ACPI but is quite possibly a
net driver problem?

quoted

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...