I recently bought this laptop and so far I have arch running on it, but I have a few issues which I haven't been able to solve yet.
It has a core duo processor, both cores are working but it won't load the cpufreq modules. AFAIK should the speedstep-centrino support core duos, but it keeps saying "no such device" whenever I try to modprobe it.
There are no ACPI warnings in dmesg. It even says that both cores support 8 throttling states and three powerstates (C1-C3).
In /proc/acpi there is 4 thermal_zones (working better than windows I'd say), battery and fan (not working though, always says off with the fan running half the uptime). So /proc/acpi does look like it is propery populated.
/sys/dev/devices/system/cpu/cpuX/ is missing cpufreq (I believe it is tied to the speedstep-centrino issue)
The dsdt is compiled with the intel compiler and has no compiling errors.
In windows the cpu scaling works.
I am currently running kernel26beyond.
I have installed cpufrequtils, but the daemons fail (no wonder).
A minor issue is that hwclock always timeouts with the result that the clock is 2 hours ahead (can't figure exactly why though). (I am living in Denmark GMT+1). And again in windows the clock is right.
EDIT: The manufacturer (after 7 months >_<) released a bios update (z114) that fixes the cpufreq issues
The clock issue was solved by editing the rc.sysinit and appending -directisa to the hwclock call: http://bbs.archlinux.org/viewtopic.php?t=18769
There is still no ACPI warnings at boot, however my logs (kernel.log, everything.log and messages.log) is filled with:
[/code]nosferatu-lap ACPI Warning (utdelete-0378): Large Reference Count (XXXX) in object dffe1ca4 [/code]
(I have in fact just deleted 600mb of logs containing that line )
The newest bios update (z114) solves the cpufreq issues.