On 08/29/13 18:44, Adrian Chadd wrote:
Hi!
Let's not finish this just yet! I'd like to try and nail down exactly
what's going on so PRs can be filed.
Absolutely. (I was thinking to do this off-list to minimize spam.)
* Is this with 9.2-RC2?
Yes this is 9.2-RC2. I think the problem is that the simple install
path ends up with out-of-date components, rather than anything wrong
with the components that should be used.
Are you wiling to try out a -HEAD snapshot to
make sure this stuff in -10 is also going to work?
Yes, but probably not until the weekend.
* Ok, so if you have no VESA option, does suspend/resume work in console
mode?
No. The system resumes (can ssh in), but the backlight doesn't come on
(using a flashlight, I don't see any video mode running either). See
http://www.sics.se/~lmfeeney/9.2-RC2/messages_console.
* Try manually setting the cpu frequency low and high (sysctl dev.0.cpu
- you can change 'freq') - see if that fixes your speed issues. Someone
else has reported this.
Before and after resume, dev.cpu.0.freq: 1700. Setting to 100 and back
to 1700 didn't seem to have much effect.
Basically, what I see is that after resume, it seems to be easier to
increase the load on the cpu (i.e. looking at top) by e.g. scrolling
quickly.
My "test" sequence was: boot,
'startx' (so twm and a couple xterms)
'top (in one xterm)
'xterm -sb -geometry 100x65' (make xterm w/ scrollbar),
'cat /var/log/messages' (in the new xterm)
scroll very rapidly up and down for ~20sec
look at top output
suspend/resume and repeat the scrolling. The load seems to go quite a
bit higher after resuming (CPU from ~10% to ~20%). But this is
definitely not a scientific test AND I was primed by Gleb Smirnoff's
comments to look for a performance hit.
For sensible use (i.e. not madly scrolling), I don't sense slowdown.
But the machine is completely minimal: portmaster and xorg are the only
ports installed. It could be that KDE + web + mail + applications
managing lots of things on the screen would show a big slowdown, as
reported by others.
It would probably make sense to define some metric that people who have
reported problems can compare before and after suspsend/resume.
Best,
Laura
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