Re: networking half-working after S3 resume

[Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>]

Hi!

> After an S3 resume, my laptop comes back to life perfectly, with the
> exception of networking. I had originally blamed this on the card
> drivers until I noticed that my wireless card can still get a link. So,
> I tried playing around a bit, and I discovered the following:
> 
> * The wireless card correctly detects my AP (SSID, speed, link power, et
> cetera)
> 
> * I can see DHCP requests coming from the laptop's wired interface, but
> the responses from my DHCP server are ignored.
> 
> * If I manually configure the wired interface on my laptop and attempt
> to ping my desktop, I can see ARP requests coming from the laptop's IP
> looking for my desktop. 
> 
> * If I run "arp -s <desktop_IP> <desktop_ETHER>" on my laptop to
> manually create an ARP table entry for my desktop, and then attempt to
> ping my desktop, I can see ICMP Echo requests coming from my laptop. My
> desktop acknowledges them, but my laptop still gets 100% packet loss.
> 
> * dmesg reports transmit timeouts, despite the fact the the packets are,
> in fact, reaching my switch:
> 
>   NETDEV WATCHDOG: eth0: transmit timed out
>   eth0: Transmit timeout, status 0c 0005 c07f media 10.
>   eth0: Tx queue start entry 4  dirty entry 0.
>   eth0:  Tx descriptor 0 is 0008a03c. (queue head)
>   eth0:  Tx descriptor 1 is 0008a03c.
>   eth0:  Tx descriptor 2 is 0008a03c.
>   eth0:  Tx descriptor 3 is 0008a03c.
>   eth0: link up, 100Mbps, full-duplex, lpa 0x45E1
> 
> So, networking is *half* working; I can send packets, I just can't
> receive any (the watchdog warnings notwithstanding). It's affecting two
> different cards, and persists after removing and reloading modules for
> each of them. Both cards seem to retain most basic link layer
> functionality. Could this be a bug higher up in the networking stack?
> (As opposed to a bug in the drivers.) I've never had an issue with any
> kernel networking code above the link layer. Is there a way to prod,
> smack or otherwise reload it?

Looks like your cards are not getting interrupts? Try hooking them on
timer interrupt.
								Pavel

-- 
People were complaining that M$ turns users into beta-testers...
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