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Old 01-05-2008, 04:33 PM   #1
Registered: Mar 2004
Location: Soviet Kanuckistan
Distribution: Slackware 12.2
Posts: 206

Rep: Reputation: 30
Linux + laptops = heat

I've been using slackware and bsd on desktops for some time now but I'm relatively new to linux and laptops.
I have noticed that my old t22 definately puts off more heat while using any non XP OS.I have configured the t22 to use the "powersave" governor and it scales down to 700 mhz and stays there whereas winnders XP can scale the cpu to any speed on the fly.I know why powersave stays at 700mhz out of 900 mhz but it's the only governor besides userspace that this old laptop seems to work with under linux.
Would OpenSuse be any better/safer for my laptop and is there the possibility of real damage from improper speedstep usage?
There is an installation DVD for opensus and a kde-cd installation.What,besides gnome,does the cd lack that the much larger DVD contains.
Thanks for any replies.

Last edited by mortal; 01-05-2008 at 04:36 PM. Reason: to add one more question
Old 01-05-2008, 04:53 PM   #2
Registered: Oct 2006
Location: London
Distribution: Arch
Posts: 183

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There may be other cpu frequency scaling modules available - these may have been compiled into the kernel, or, more likely if you cannot see them, as modules. If they have been compiled as modules, you can search for them like so:

find /lib/modules/<kernel version>/ -type f -iname '*.o' -or -iname '*.ko' | grep cpufreq
This should give you a rough indication of the options that are avaliable to you. You can have a go with these options if you like, but you should also check what the minimum and maximum cpu settings are. Your cpu may be able to run lower than it currently is.

cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq
On gentoo, this gives me the minimum set value for the frequency. To see what frequencies are avaliable for your processor, you should issue something along the lines of:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
There is a possibility that the minimum frequency is set lower than the minimum available frequency that can be handled by your processor. The commands on your system may be different from the ones I have shown above.
Old 01-06-2008, 12:37 PM   #3
Registered: Mar 2004
Location: Soviet Kanuckistan
Distribution: Slackware 12.2
Posts: 206

Original Poster
Rep: Reputation: 30
Okay,thanks man.I'm gonna give openSuse a try and go from there for the hell of it.

Well,I gave it a go.OpenSuse is better than Ubuntu on this laptop for sure but I won't be keeping it around as it is not as complete as Slackware which along with FreeBSD and NetBSD will remain my Os' of choice.As far as Speedstep, well I'll keep hacking at it but I think XP has an advantage there for laptops,of course I'm probably wrong about that to.

Last edited by mortal; 01-09-2008 at 08:10 PM.


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