[RESOLVED]Crunchbang runs much hotter than *buntus

lionhater · 2012-05-26 07:44:24

As a former Lubuntu user (and before that a very long time Mac user) I find Crunchbang user friendly and elegant, but it runs around 10 degrees C hotter than *buntus.

I've read in other threads that 42-45 C (my sensors reading) is not something to worry about, but I'm obsessed with the CPU temps as I want to achieve a silent operation, one thing I miss from my Mac days.

I've got a very minimalist system: i3-2100, Asus P8H67-M, SSD and BR drive. I've disabled and removed all the wireless stuff as I don't have anything wireless. Have also disabled compositor and removed volumeicon, parcellite and pulseaudio.

*buntus seem to have a trick in this regard, 5-15 C lower than some other distros I've tried. Yet LMDE Xfce (35-37 C) is better than Crunchbang as well.

The lowest reading I've got is from Lubuntu: 30-35 C. In 12.04 RC sometime before an upgrade I've even got 19-25 C.

In Mint forums a poster has said this about the subject:

This might be why lubuntu runs cooler, all the buntus have a head start on the rest of Linuxes until they get the 3.4 kernel. http://techhamlet.com/2012/05/ubuntu-12 ... r-heating/

If that's true I can live with this and wait for the 3.4 kernel.

Thanks for the fine distro and the informative forum.

Last edited by lionhater (2012-05-26 08:24:40)

el_koraco · 2012-05-26 07:51:03

These Ubuntu blog weenies are getting more annoying by the day. We can't install Linux without breaking hardware and only Ubuntu saves us? Fuck you Tech Hamlet, and the horse you rode in on.

Anyway, open /etc/default/grub, and change this:

 GRUB_CMDLINE_LINUX_DEFAULT="quiet"

to this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet i915.lvds_downclock=1 i915.i915_enable_fbc=1 i915.i915_enable_rc6=1"

Then run

sudo update-grub

and reboot.

lionhater · 2012-05-26 08:08:18

Thank you for the prompt reply, el_koraco. Increadable, by just that it's down 4-5 C now! Would kernel 3.4 bring a more dramatic change?

lionhater · 2012-05-26 08:09:59

Hey, it seems to keep going down! 37 C with six Iceweasel tabs.

el_koraco · 2012-05-26 08:21:34

Install cpufreq-utils if you wanna keep it down more. Also, an option is to add pcie_aspm=force to the same kernel line as mentioned earlier. That may or may not work. When the 3.4 kernel comes in, the enable rc6 option will be the default. That's a feature of Intel HD cards, which allow them to enter the deepest "on-hold" state, and it keeps temps down and battery life up. Ubuntu has just backported these. The Liquorix kernel also has the fixes incorporated. The temps will drop to 32 degrees, just let the driver warm up a little and pick up your activity.

lionhater · 2012-05-26 08:23:50

Many thanks, much appreciated.

el_koraco · 2012-05-26 08:26:07

ACtually, you'll get a more accurate reading with lm_sensors. Run the command sensors in the terminal. If nothing shows up, install lm-sensors adn run sensors-detect. The standard sensors interface reports virtual ACPI temperatures. They're fairly accurate, but for full effect, you need to do

sudo modprobe coretemp
sensors

Then you'll get something like this:

elkoraco@mrdeb ~ % sensors
acpitz-virtual-0
Adapter: Virtual device
temp1:       +35.0°C  (crit = +128.0°C)                  
temp2:        +0.0°C  (crit = +128.0°C)                  
temp3:       +28.0°C  (crit = +128.0°C)                  
temp4:       +37.0°C  (crit = +128.0°C)                  
temp5:       +24.0°C  (crit = +128.0°C)                  
temp6:        +0.0°C  (crit = +128.0°C)                  
temp7:        +0.0°C  (crit = +128.0°C)                  
temp8:        +0.0°C  (crit = +128.0°C)                  

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0: +38.0°C  (high = +80.0°C, crit = +85.0°C)  
Core 0:        +36.0°C  (high = +80.0°C, crit = +85.0°C)  
Core 1:        +39.0°C  (high = +80.0°C, crit = +85.0°C)

The readings Core 0 and Core 1 show your two processor cores. Since Sandy Bridge graphics are integrated into the processor, that's the "real" temperature.

Last edited by el_koraco (2012-05-26 08:26:32)

lionhater · 2012-05-26 08:28:29

Sorry to have omited this before, yes I use lm_sensors in conky. Thanks again.

shaiss · 2012-05-27 03:50:17

I added that line to grub, rebooted and no change. My single core atom reports this:

shai@WindBook:~$ sensors
acpitz-virtual-0
Adapter: Virtual device
temp1: +76.0°C (crit = +100.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Core 0: +67.0°C (crit = +90.0°C)

CPUFrequtils reports processor running at 1.6. at other times core 0 is at 44c and cpufrequils says cpu is at 800mhz. I'm not sure why my proc is getting so hot.

machinebacon · 2012-05-27 06:22:20

^ What happens if you reduce the brightness of your screen? I fail to find the post which has been posted recently about CPU overheating due to an "unadjustable" xbacklight.

el_koraco · 2012-05-27 08:33:22

shaiss wrote:

I added that line to grub, rebooted and no change. My single core atom reports this:

lspci -knn

please

shaiss · 2012-05-27 15:22:18

lspci -knn output:
http://crunchbanglinux.org/pastebin/1671

thanks!

el_koraco · 2012-05-27 20:53:03

Well, let me see

uname -a
cat /etc/default/grub

Last edited by el_koraco (2012-05-27 20:53:33)

shaiss · 2012-05-27 23:28:24

Looks like my error. I think it was too late and I forgot to run the update-grub

here's the output of the cat command:
http://crunchbanglinux.org/pastebin/1672

running at 37C now.

dura · 2012-09-18 20:43:12

I added:

pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 i915.semaphores=1

to grub. El Koraco, you think it would be worthwhile having a go at your suggestion instead? The above reduced battery consumption dramatically on my x121e.

Extremely happy with it, but that silent running sounds tempting

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#1 2012-05-26 07:44:24

[RESOLVED]Crunchbang runs much hotter than *buntus

#2 2012-05-26 07:51:03

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#3 2012-05-26 08:08:18

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#4 2012-05-26 08:09:59

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#5 2012-05-26 08:21:34

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#6 2012-05-26 08:23:50

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#7 2012-05-26 08:26:07

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#8 2012-05-26 08:28:29

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#9 2012-05-27 03:50:17

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#10 2012-05-27 06:22:20

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#11 2012-05-27 08:33:22

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#12 2012-05-27 15:22:18

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#13 2012-05-27 20:53:03

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#14 2012-05-27 23:28:24

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

#15 2012-09-18 20:43:12

Re: [RESOLVED]Crunchbang runs much hotter than *buntus

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