Re: Fedora 18 network freeze after a while...

[Georgios Petasis]

Στις 5/3/2013 9:34 μμ, ο/η Georgios Petasis έγραψε:
>  Στις 5/3/2013 8:55 μμ, ο/η Rick Stevens έγραψε:
> > On 03/05/2013 10:31 AM, Georgios Petasis issued this missive:
> >> Hi all,
> >>
> >> I am facing a very strange problem after upgrading to fedora 18: while
> >> the system works ok (I use the machine through vnc),
> >> after some time (which can range from 30 minutes to a few hours) all
> >> network interaction rapidly deteriorates, until network is no
> >> more useful (i.e. I cannot even ssh to the machine).
> >>
> >> How can I find out why this is happening? I didn't had any problems 
> >> with
> >> fedora 17, and I have tested the RAM, which showed no errors.
> >
> > Need more info:
> >
> > 1. Wired or wireless?
>  Wired.
> >
> > 2. Using NetworkManager or classic network config?
>  Network manager.
> >
> > 3. DHCP or fixed IPs?
>  Fixed IP.
> >
> > 4. Does anything weird show up in the output of dmesg or in any of the
> > log files (e.g. /var/log/messages, etc.)?
>  No, but I am searching for it. The motherboard has a Z77 chipset.
>
>  I see some errors like:
>
>  DMA: Out of SW-IOMMU space for 32768 bytes at device 0000:05:00.0
>
>  I don't know the device though.
>
>  George
>  
Finally, this is the problem, the kernel error comes from the driver for 
the atheros gbe lan chip.
I see that there is a bug in the atl1c kernel module, introduced with 
the 3.8.0 kernel, and exists also in3.8.1.
 From what I understood, 3.8.2 will also have this bug.

So, fedora is unusable at least until kernel 3.8.3 gets included, for 
systems with atheros chips (i.e. many gigabyte boards).

George