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pau
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PostPosted: Sun Sep 25, 2005 1:03 pm    Post subject: gentoo on powerbook 12" general questions Reply with quote

Hi,

i am sorry if these questions are too general, but I searched for a while and I see different answers according to the model on which gentoo is installed...

I will get a powerbook 12" from my institute in a couple of weeks. I chose it because it is very quiet and light, after making a kind of opinion poll in the hardware forum.

I would like to install gentoo on it and I am happy to see that, at least, there is a possibility to work with airport extreme now. My questions are about the configuration

1- Is suspend to disk - to ram working? The powerbook 12" has a nvidia card and, as far as I know, there are some issues with it on a mac
2- What about fan? Is it loud? I've been told that some people even didn't know there's one because with MacOSx it did never start. With linux yes
3- A naive question... supposing that i've installed gentoo on it and everything went fine... Is the installation of packages like in a "normal" x86? Or are
there packages restrictions?

thanks
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DrZoidberg
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PostPosted: Sun Sep 25, 2005 1:54 pm    Post subject: Reply with quote

1. Sleep, as in "suspend to RAM," works fine on my iBook G4 running gentoo-sources 2.6.12-r2. A minor annoyance is that pbbuttonsd stops working on resume and has to be restarted. Previous kernels had big problems with sleep so stick with 2.6.12+. I don't know about suspend to disk. I have ATI radeon 9200 video. No idea about nvidia.

2. You can control the fan behavior in linux by specifying the temperature to start the fan and its speed. I have an iBook G4 and this is what i have in my /etc/modules.autoload/kernel-2.6 file
Code:

therm_adt746x fan_speed=32 limit_adjust=+5

My system runs a lot hotter in OS X and I have no control of fan behavior. The iBook's fan is a bit loud when stuff is compiling, but for ordinary use, the cpu temp. is around 52C and the fan stays off. Under Tiger, the fan comes on somewhere between 60-70C. It comes on when running virtual PC, some games, and while compiling stuff.

3. Most everything works the same. Of course x86 binary-only stuff like the flash player will not work. But I really do not miss that garbage. Some obscure things like OLD nintendo emulators do not work because parts of them were written in x86 assembly for speed. Obviously, VMware will not work. :)

Most of the time I can't tell the difference from a x86 linux system.
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pau
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PostPosted: Sun Sep 25, 2005 2:24 pm    Post subject: Reply with quote

Hey, thanks for the answer...

Yours is a 15" or 17", right?

Quote:
Under Tiger, the fan comes on somewhere between 60-70C. It comes on when running virtual PC, some games, and while compiling stuff.


Well I thought the idea of the powerbooks or ibooks is that the chassis is dissipating heat easily because it's made out of aluminium... I don't understand very well your /etc/modules.autoload/kernel-2.6 file, but i have the feeling that you tell the fan to come on at... which temperature?
Are you using the same temperature as OSX?

I have another question to you... an in general to everybody in this forum with dual boot gentoo/OSX...

Why are you keeping OSX?

If what you want is a unix system, well then you have OSX working perfectly... If not, maybe you want to go for the free thing and then linux/gentoo is the best choice but again... why do you keep OSX on your hard disk?

In my case it's just a question of ethic (I don't like any closed system) and language support... My mother tongue is Catalan and Apple is not supporting it, although we're about 11 million speakers, they decided not to include Catalan in their OSX and, even though I can manage more or less in English (as you see) and in other languages, I kind of stick to Catalan... They're supporting Norwegian or other languages spoken by less than three million people (like Danish) because... well "it's the money, idiot, it's the money!" :) And I don't like it
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JoseJX
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PostPosted: Sun Sep 25, 2005 2:57 pm    Post subject: Reply with quote

nVidia chipsets currently do not support sleeping like the ATi based Macs. You can approximate it with Sofware Suspend, but it's not quite as elegant as sleep is.
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e-ipi
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PostPosted: Sun Sep 25, 2005 10:38 pm    Post subject: Reply with quote

JoseJX wrote:
nVidia chipsets currently do not support sleeping like the ATi based Macs. You can approximate it with Sofware Suspend, but it's not quite as elegant as sleep is.


But on the other hand, if you're not going to use the laptop for a while suspend to disk is a better option than sleep/suspend to RAM. I never got my Thinkpad to suspend to RAM, but I never really missed it.
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DrZoidberg
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PostPosted: Sun Sep 25, 2005 10:44 pm    Post subject: Reply with quote

I have a 12" 1.2GHz iBook with 768MB RAM.

About the fan control,
Code:


modprobe therm_adt746x fan_speed=32 limit_adjust=5 
will make the fan start at speed 32 when the CPU reaches 55°C.

 

The defaults are paranoid, causing the fan to come on way too much.
This setting causes the fan to behave almost the same as it does in OS X. But the system still runs cooler in Linux. I don't think tiger likes to put the hard drive to sleep as much as cpudynd does. Or maybe some mysterious Tiger process keeps waking it up.

Quote:

Why are you keeping OSX?

If what you want is a unix system, well then you have OSX working perfectly... If not, maybe you want to go for the free thing and then linux/gentoo is the best choice but again... why do you keep OSX on your hard disk?


There are a few things which linux does not do well or at best does intermittently. For example, playing/ripping DVDs has always been a mess. Right now it works pretty well for me, but I'm paranoid that something will break it in the reasonably near future. I grant that attempting to maintain non-Apple software on OS X is a losing battle (as if Apple wants you to use freeware instead of their iCrap!).
Getting anything to compile is a major pita.
But damn OS X looks pretty. I just can't bring myself to get rid of it..... I also like being able to insert a USB storage device or CD and have it just pop up on the desktop. HAL/dbus/gamin whatever are valiant effort that I appreciate, but under gnome or KDE things are still a little flakey. Gamin sometimes hogs %100 cpu when I insert a data CD, usb-storage works most of the time, but once in a while goes on the fritz... On the other hand, my discontinued 1st generation Neuros audio player works perfectly in linux and not at all in OS X....
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JoseJX
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PostPosted: Sun Sep 25, 2005 11:49 pm    Post subject: Reply with quote

I have left my PB G4 500 in sleep for a few days and definitely still had battery remaining. It's faster to come back from sleep than suspend also. If you have it, you do miss it when it's not there. :)
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echo6
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PostPosted: Mon Sep 26, 2005 7:39 pm    Post subject: Reply with quote

The FAQ doesn't mentioned software suspend in respect of the powerbook, neither does the ppc handbook, can you point me to documentation regarding setting it up? TIA.
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