lost eth0 on suspend/resume

[mikus]

This may be a duplicate - but here is another "suspend" problem:

Am using an USB-ethernet adapter. With Q2D08 the XO starts up fine, seeing the ethernet (via 'eth0'). At this time the radio interfaces are 'eth1' and 'msh0-something'. When I don't have any input for a long time, the system suspends. After being awakened, 'eth0' is gone. The radio interfaces are 'eth1', 'eth2', and 'msh0-something'. [If I try '/sbin/ifconfig eth0', it tells me there is no *device* for eth0.] [Using build 681]

[mikus]

Just thought of something -- when the XO suspends, it drops power on my USB-ethernet adapter. Could that have a bearing on the device_for_'eth0' not being found by resume ?

[jg]

Mikus, please don't set the milestone on the bug; otherwise bugs get lost.

It seems likely your USB/ethernet adaptor became eth2.

Could you please check?

Also, was your ethernet interface plugged in before the machine was booted?

[mikus]

My wired ethernet adapter was plugged in before the machine was booted. [That was how 'eth0' was assigned to it.]

[br]

It seems likely your USB/ethernet adaptor became eth2.

See my ticket description. My experience with the XO is that, when at boot there is no wired connection, there are TWO 'eth' interfaces set up (for the radio - might they be one for the school, and one for outside?) in addition to the mesh interface. Both 'eth' interfaces have canned (XO given) IP addresses.

When at boot there is a wired connnection which supplies an IP address, it gets set up as 'eth0' (with that IP address). The radio (as I said) is left with ONE 'eth' interface ('eth1', with a XO assigned IP address) in addition to the mesh interface.

After the suspend/resume (when originally booted as in the paragraph above), the radio as I said in the ticket description appears to have again been given TWO 'eth' interfaces (now 'eth1' and 'eth2') in addition to the mesh interface (similar to what the radio is given at boot without a wired connection). Both 'eth' interfaces have canned (XO given) IP addresses.

[mikus]

before closing lid - eth1 is wired

[mikus]

after re-opening lid - eth1 is radio

[mikus]

Repeated this on Joyride 2181.

Because 'suspend' drops USB power from the XO, these days I have a self-powered USB hub plugged into the XO. The ethernet adapter is then plugged into the USB hub.

When I boot the XO, it turns the ethernet adapter 'on' - the lights on the adapter are lit. I 'suspended' the XO by closing the lid. The lights on the ethernet adapter stayed 'on'.

As soon as I 'resumed' (that is, opened the XO lid), the lights on the ethernet adapter were turned 'off' (and stayed 'off' until I rebooted).

I took one 'olpc-log' dump before I closed the lid, and took another 'olpc-log' dump after I had re-opened the lid.

The XO never "restored" my ethernet connection. [Before closing the lid, I had made sure the ethernet connection did work.]

Note: these days the ethernet connection seems to be on 'eth1', not on 'eth0' as it was when I originally wrote this ticket.

[mikus]

Repeated this, using Joyride 2264. Same result.

[mikus]

Joyride 2264. log taken before suspend

[mikus]

Joyride 2264. log taken after suspend

[mikus]

Joyride 2264. log taken long time after ctl-alt-escape (to restart Sugar)

[mikus]

With 0.82 heading towards release, it was time to revisit this problem. It is preventing me from using 'suspend' at home (where I connect through wired ethernet).

---

Booted Joyride 2368 (manually upgraded to 2371). Verified that internet connectivity worked. Shut lid and waited two minutes.

Opened lid. 'ifconfig' showed the same resources as before the suspend. '/etc/resolv.conf' showed the correct nameserver. 'netstat -rn' showed the CORRECT values for eth1 (where the ethernet happened to have been allocated at boot), but omitted the msh0 entry in the routing table.

BUT, while ping 192.168.1.8 (own ID) worked, ping 192.168.1.1 (gateway) returned 'Destination Host Unreachable'.

For me, this is a serious problem.

[mikus]

olpc-log dump taken after lid reopened (Joyride 2368+), can't use ethernet