Macbook (5,1) hotter in linux than in OSX

[druggo]

tobbe@toben:~$ dmesg | grep ACPI | grep CPU
[    2.159752] ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
[    2.159831] ACPI: Processor [CPU0] (supports 8 throttling states)
[    2.191389] ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
[    2.191465] ACPI: Processor [CPU1] (supports 8 throttling states)

will look into powertop and the tip it suggests...

[kosumi68]

the reason why i want to get the cpu freq down (and hopefully the heat), is to get the battery life up, 2 hours under linux honestly sucks (much depending on that we can't change background since nvidia don't support RandR yet, right?)

Do you by any chance have the kernel module mbp_nvidia_bl installed, and a device called /sys/class/backlight/mbp_backlight/brightness? If so, what happens if you do

echo 5 | sudo tee -a /sys/class/backlight/mbp_backlight/brightness

[Nikos.Alexandris]

(testing on MBP 5,1)

I have installed and ran powertop. Some of the suggestions that I (think) implemented are:

* set VM writeback to 1500

* enable USB Suspend (this comes several times for several hardware -- e.g. for keyboard, mouse, broadcom and even the ir port)

* $ sudo hal-disable-polling --device /dev/cdrom
[sudo] password for nik:
Following symlink from /dev/cdrom to /dev/scd0.
Polling for drive /dev/cdrom have been disabled. The fdi file written was
/etc/hal/fdi/information/media-check-disable-storage_model_DVD_R___UJ_868.fdi

* I also turned off wifi and bluetooth.

I have the impression that the battery gets eaten up a bit slower!

Do you by any chance have the kernel module mbp_nvidia_bl installed, and a device called /sys/class/backlight/mbp_backlight/brightness? If so, what happens if you do

echo 5 | sudo tee -a /sys/class/backlight/mbp_backlight/brightness

kosumi68, where can I find this module?
The command "sudo apt-cache search mbp_nvidia" does not return something.

[Nikos.Alexandris]

(testing on MBP 5,1)

[...]

kosumi68, where can I find this module?
The command "sudo apt-cache search mbp_nvidia" does not return something.

Sorry, thought it was a package. I have tried to load but...

sudo modprobe mbp_nvidia_bl

FATAL: Error inserting mbp_nvidia_bl (/lib/modules/2.6.27-7-generic/kernel/drivers/video/backlight/mbp_nvidia_bl.ko): No such device

[kosumi68]

I have the impression that the battery gets eaten up a bit slower!


kosumi68, where can I find this module?
The command "sudo apt-cache search mbp_nvidia" does not return something.

Good good.

sudo modprobe mbp_nvidia_bl

(its a kernel module)

[Nikos.Alexandris]

I have added it in /etc/modules (as you suggested in another thread). I am rebooting now and see what happens

Thanks kosumi68 for all of your efforts. I think I am going to keep this machine. It's worth the effort to make it run Ubuntu

[Nikos.Alexandris]

OK, I experienced another boot-up hang (not freeze). Boot process got stuck at:
* Saving VESA states...

I waited for a minute or so. The green led on the Caps-Lock key worked so I've just pressed Fn+ctrl+alt+Backspace and the restart process froze at the very end (Now restarting or something).

Anyway, I booted up again without any problem but the mbp_nvidia_bl modules is not loaded although present in /etc/modules

lsmod | grep nvidia

nvidia               7804864  28 
i2c_core               36128  1 nvidia

And now?

[kosumi68]

Do you get an error message on screen or in dmesg when loading the module with

sudo modprobe mbp_nvidia_bl

(there is no immediate need to reboot in order to get the device going).

[Nikos.Alexandris]

Do you get an error message on screen or in dmesg when loading the module with

sudo modprobe mbp_nvidia_bl

(there is no immediate need to reboot in order to get the device going).

Yes, the same error message as in (my) post #24

[kosumi68]

Ah, the forum seems to be lagging - i missed your comment. Thanks for testing, I got the answer I suspected. The new graphics card is simply not supported at any level at this stage. We'll keep our eyes open. Cheers!