X60T Bus-Master-Activity on Core1 high when idle [solved

[schmolch]

Hi Guys,

i recently got the X60T and trying to figure out why i miss 2h of battery-life i noticed that the Bus-Master-Activity on CPU1 is ffffffff when idle whereas it should be very low as it is on CPU0.
When i put some load on both cores the BMA of CPU1 is normalizing itself and varies according to the load.
When i leave the Laptop idle for a while it gets actually hotter then when i use it because of this.
The CPU is also not able to stay in C3 , probably because of the high BMA.

I have already looked for help about this on various forums and mailing lists and it has come to a point where giving up comes into mind.

I know that this situation is not normal, other people have fine BMA's on their CoreDuo CPUs under Linux.

I tried several different kernels and i also know how to configure the kernel yourself.
I booted a VERY minimal Gentoo-Linux, no WLAN, no USB, no X etc.
Played with the BIOS-Settings, booted SLAX from usb (cpu1 is disabled but then cpu0 is ffffff) and now there is nothing left to try then buying a dvd-burner tomorrow and update the BIOS.

I just hope that somewhere down the road i will find someone else with a X60T running Linux.

[iMav]

I'd go and ask in this thread on the Ubuntu forums. Also EmperorLinux sells X60t's pre-installed with Linux so I would check with them as well.

[schmolch]

Thanks, i just got the solution from the linux-acpi mailing list.
Unloading the uhci_hcd module fixed the issue, added 1h Battery-Life. ehci_hcd is still loaded.