I got this kernel with the standard updates of ubuntu lucid (alpha 2).
Normally, it's the same as the one you can get from 
http://packages.ubuntu.com/lucid/any/linux-image-2.6.32-13-generic

Here are the features I tested so far :
- intensive use of the CPU (through BOINC), making use of 100% of the 4 logical 
cores : it's stable
- monitoring of the speed of the CPUs through the applet : works. I can see the 
frequency changing when the load of the computer varies
- monitoring the temperature of CPU and motherboard : works, although I'm not 
sure the temperatures are correct (for the CPU : around 10°C when idle, and 
30°C with full load)
- monitoring the speed of fans : works. Tested with CPU fan and one system fan
- opengl video (provided by the CPU : Intel HD graphics) : compiz works with 
full visual effects. Google earth too. I don't know if all the features are 
supported in this kernel (hardware decompression of some codecs), but it's 
enough for my needs
- audio analog input (microphone), analog output (stereo), and digital (IEC958) 
: works
- VGA, DVI and HDMI video output : works, including dual head with DVI and HDMI 
(but I did not manage to set the resolution I wanted with dual head : only had 
1280x1024. But that's probably a software problem)
- standby mode : works. I was surprised to see the very low power consumption 
in this standby mode : 2.5W for my whole computer (and 0.7W when powered-off)
- network card : works. Maybe I encountered a bug once (not sure) : it detected 
a gigabit link, instead of the 100Mb network I physically have. So no packets 
could be transmitted. A reboot seemed to solve this problem
- sata drives : tested with 2 sata disks connected : works
- USB : works with all the devices I plugged into
I did not find any non-OS-supported feature of this mainboard/CPU so far. And 
it's a real pleasure to have a computer without any proprietary drivers

-- 
Cannot boot 9.10 with ACPI support on Intel DH55TC mb
https://bugs.launchpad.net/bugs/507770
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