[ltp] poor battery-life on X60T

[Sascha Heid]

Am Freitag, den 09.02.2007, 18:34 +0100 schrieb Sascha Heid:
> > And something else:
> > While the Bus-Master-Activity of CPU0 is varying according to the
> > CPU-Load, the Bus-Master-Activity of CPU1 is always way up (ffffffff
> > almost always).
> 
> Today i noticed something funny, the Bus-Master-Activity of CPU1 is
> still extremely high when the Laptop is idle, but goes down to normal
> Levels (like CPU0) when i use the Laptop.
> I got home from work and found the CPU-Temp at 60C (being idle), after
> using the Laptop for a while it dropped to 44C.
> 
> Man this is weird, when i compile the kernel with make -j3 the
> Bus-Master-Activity of both Cores is very low and only then CPU1 drops
> its temp below that of CPU0.
> 
> Is this whole thing looking like i have done something terribly wrong
> somewhere, because i start to wonder?


I got the solution from the linux-acpi mailing-list.
The culprit was uhci_hcd, removing it fixed the BMA Issue, Battery-Life
raised 1h and temps dropped 5C.
ehci_hcd is still loaded so usb can be used just fine.

:-)