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-   -   n800-s2ram ? What is this ? (https://talk.maemo.org/showthread.php?t=21923)

scaldov 2008-07-20 10:57
Re: n800-s2ram ? What is this ?
 
Still trying to avoid seldom hangs. 1.0.10 - test it. May be better to restore wifi connection.

svs57 2008-07-20 11:39
Re: n800-s2ram ? What is this ?
 
Is it possible to add suspend to power button menu instead of lock button?
I like listen music via a2dp. Tablet should be locked because I put it into pocket.

Then If I lock tablet with power connected screen doesn't turn off.
I test 1.0.10:
CPU utilization n810-s2ram > 90%

Thank you.

allnameswereout 2008-07-20 11:53
Re: n800-s2ram ? What is this ?
 
Right now I really bricked it :rolleyes:

I'll give it a few retries, but I already tried my previous trick and it didn't work.

With the battery hanging lose in it I'm throwing the towel in the ring... IOW another reflash :D ...and although last night I thought about giving up I'm changing my mind due to your recent versions.

IMO this feature is essential for a device like this. I was surprised to learn it was missing when I first got my N810. Thanks for the great work!

scaldov 2008-07-20 12:15
Re: n800-s2ram ? What is this ?
 
ough. 1.0.10 is really ****. I had to remove battery. I'm deep-thinking. There's no place where daemon could hang, but it sometimes hangs ant uses all CPU time.

allnameswereout 2008-07-20 16:13
Re: n800-s2ram ? What is this ?
 
Which version is the most safe?

scaldov 2008-07-20 18:13
Re: n800-s2ram ? What is this ?
 
Now I'm testing 11.

allnameswereout 2008-07-20 20:05
Re: n800-s2ram ? What is this ?
 
Sorry, I might have attributed the reflashing debacle to n800-s2ram while it was due to a different program. I'll be more than happy to try the next testing n800-s2ram!

svs57 2008-07-21 21:45
Re: n800-s2ram ? What is this ?
 
I tested 1.0.11.Works fine.
Thank you.

Is it possible to add suspend to power button menu instead of lock button?
I like listen music via a2dp. Tablet should be locked because I put it into pocket.
Now lock button suspend tablet.

mscdex 2008-07-22 07:14
Re: n800-s2ram ? What is this ?
 
Quote:
Originally Posted by svs57 (Post 205618)
I tested 1.0.11.Works fine.
Thank you.

Is it possible to add suspend to power button menu instead of lock button?
I like listen music via a2dp. Tablet should be locked because I put it into pocket.
Now lock button suspend tablet.
I second this.

fanoush 2008-07-22 07:52
Re: n800-s2ram ? What is this ?
 
Quote:
Originally Posted by igor (Post 204885)
I don't want to discourage experimentation, in fact it's really cool to see such projects, if nothing else because they promote knowledge of runtime embedded power management.

However I have a question: did anybody measure the increased battery lifetime with this mod?

If not, the first step would be to check how many days a specific unit (pair device-battery) lasts with the stock idle power saving and stock image, and then how long the same unit can live in idle with s2ram.

When i say idle, i really mean it, no usage at all, so this is probably for somebody with a spare / old unit.
I tested this three times on completely idle N810 with Chinook OS2008 FW and it lasted approx 30 days (29,30,31). I did a quick check once a week if the unit is still alive so it theory it could last a bit longer.

s2ram project is indeed cool but there are only some use cases where this is really useful.

1. you really want to save battery when somewhere in the desert with no electricity
2. you are running buggy software on the background which eats CPU


Since case 2 is quite frequent it really makes sense to have some sort of real device suspend. BTW, writing kernel thread that kicks watchdog (without waking up userspace) could be interesting (but dangerous).


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