Re: Setting my WiFi adhoc connection in power save mode

[Stanislaw Gruszka <sgruszka@redhat.com>]

On Fri, May 13, 2011 at 02:27:22PM +0200, Johannes Berg wrote:
> > > Deliberate. On some platforms/systems, the way the device goes to sleep
> > > caused DMA trouble or something like that, and the ucode would sysassert
> > > when it tried to wake itself up. The problem was fairly rare, but of
> > > course the device wakes up 10 times a second or so ...
> > 
> > It's interesting if PS on 3945 ever works or was broken from very
> > beginning. I bet it was, on some old kernel, and this issue is similar
> > case like most of other bugs we have in iwlwifi - something that worked
> > well was broken by adding new chipsets/features support, but never fixed
> > again and just masked/disabled instead.
> 
> I doubt it, iirc it was just some DMA issue that was discovered at some
> point and nobody could really pinpoint it. Those old devices stored some
> internal data into a host memory buffer, and reading them back sometimes
> corrupted them.

Ok, so I will probably not try to reenable PS (as long someone clearly
state that it works in the past, and this is a regression).

Does this problem happen on both 4965 and 3945 ?

Stanislaw