Ubuntu 7.10 on a Laptop slow startup

[Robert Spanjaard]

On Fri, 28 Dec 2007 19:01:11 -0800, NoOp wrote:

>> Quite often slow boots are the symptom of timeouts and DHCP/DNS lookups
>> from routers when that informations is superfluous.
>> 
>> Before digging into this with any great gusto, you could try installing
>> bootchart and analysing or posting links to the resulting png files it
>> produces - these will show you exactly where the delays are occurring in
>> your machine.
> 
> I've always found issues with bootchart:
> 
> 1. It causes the system to boot slower (due to creating the chart) 2. I've
> never been able to interpret just what it is showing. Nice graphic, but
> can't view much as it's such a large png and there doesn't seem to be any
> help/explanation as to what you are looking at.
> 
> Take http://www.arumes.com/temp/gutsy-20071228-2.png for example; what
> exactly does that png show? How do you read it?

Don't you see the blue bar labeled "usplash"?

> http://www.arumes.com/temp/gutsy-20071228-1.png seems to be somewhat
> better, but again, how do you read it and determine what is the cause of
> the slow startup?

That long blue bar from the other chart is _missing_ in this one, because
the splkashscreen is disabled.

> IMHO asking someone to install bootchart doesn't help much unless you
> provide details as to what they should be looking for in the bootchart.

The legends are at the top of the chart. This was the first time I used
it, without any help, and IMO it's quite easy to see (at least partly)
what's causing the problem. Ofcourse a chart doesn't tell the whole story
(_why_ is usplash using so much CPU-power?), but it's a good start.

-- 
Regards, Robert                                      http://www.arumes.com