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 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
