[ltp] X60 hardware questions (no C4 state, only 3015 out of 4096 GB)

[Richard Neill]

Dear All,

Am still trying to get my new X60 optimised. Am having some trouble
getting power-consumption down below 11W, and a few other things. so 
help would be useful. I tried everything in thinkwiki, on both Ubuntu 
Jaunty and now Karmic.

1. No C4 state available. Powertop doesn't even show this as an option:

-----------------
Cn                Avg residency       P-states (frequencies)
C0 (cpu running)        ( 1.1%)         2.00 Ghz     0.0%
C0                0.0ms ( 0.0%)         1.67 Ghz     0.0%
C1 halt           0.0ms ( 0.0%)         1333 Mhz     0.0%
C2                0.1ms ( 0.1%)         1000 Mhz   100.0%
C3               10.7ms (98.8%)

Wakeups-from-idle per second : 104.2    interval: 5.0s
Power usage (ACPI estimate): 12.7W (0.4 hours)
----------------

Is this just a naming issue between C3 and C4, or am I completely 
missing something?




2. Only 3015 MB of the 4096 MB of RAM is available to Linux. According 
to thinkwiki, this is because of "chipset limitations", but the BIOS 
does see it all. That puzzles me somewhat.



3. Some other things that seem odd:

  - I can't rmmod uhci_hcd to kill off USB1.1. It seems, I think, to be
    compiled in permanently. Anything I can do about this (without
    building a custom kernel?)

  - The system bell (Ctrl-G) is now a nice-sounding wav file, not the
    old-fashioned pcspkr beep. But it has a latency of about 0.5 seconds
    I can't find the pref to turn it back again.

  - I was going to add here that I couldn't make hdaps work, but I fixed
    that :-)  This link was very helpful
http://meandmyubuntu.blogspot.com/2009/05/getting-hdasp-to-work-on-jaunty.html
    see also here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/297213



Thanks,

Richard