Re: Suspend to RAM regression tracked down

[Dave Jones <davej@redhat.com>]

On Fri, Jul 07, 2006 at 09:25:37PM +1000, Jean-Marc Valin wrote:
 > > There was a race in ondemand and conservative which made them lock up on 
 > > resume (possibly only on SMP systems though).  There's a patch for that 
 > > in current -mm, but I suspect there's another problem (still haven't had 
 > > any time to track it down).
 > 
 > OK, I tried the patch with 2.6.17 and it didn't work. My laptop failed
 > to resume on the first try, so it must be something else. Could someone
 > actually have a look at the changes in 2.6.12-rc5-git6 (which happen to
 > be cpufreq-related)? I spend months pinpointing the problem to that
 > version (it's takes several days to reproduce). I'd appreciate if
 > someone could at least have a look at what changed there and maybe fix
 > it.

Can you show /proc/cpuinfo for the affected system ?
If it's 15/3/4 or 15/4/1, that would explain why this kernel,
as this was when support for those models got introduced to
speedstep-centrino.

If it's not that, there is a pretty large delta in the ondemand
governor in this update, but I don't see anything blindlingly
obvious from looking over it.

		Dave

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