Intel_DH55TC

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One fix is to use the command line ACPI=off or ACPI=ht.<<BR>> One fix is to use the kernel parameter ACPI=off or ACPI=ht.<<BR>>

Intel DH55TC motherboard

The system freezes when gnome is launched with the kernel included in 9.10 and 10.04 alpha 2.
See https://bugs.launchpad.net/ubuntu/+source/linux/+bug/507770
One fix is to use the kernel parameter ACPI=off or ACPI=ht.
This will allow to install the system using a live media.
The main problem with disabling ACPI is that the system will use only 1 of the physiscal/logical cores available, and speedstep will not work.

A good fix is to install a recent kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/
Steps to do this:

  1. Open http://kernel.ubuntu.com/~kernel-ppa/mainline/

  2. select v2.6.33-rc5/ (latest at present, you might try a more recent one)
  3. download linux-image-2.6.33-020633rc5-generic_2.6.33-020633rc5_amd64.deb (or one matching the chosen version)
  4. sudo dpkg -i linux-image-2.6.33-020633rc5-generic_2.6.33-020633rc5_amd64.deb
  5. reboot

At present (26/1/2010) I am running 10.04 alpha 2 with all updates and the kernel mentioned above, and the system is working very well, and fast.
Graphics(both 2D and 3D), sound, network card, all run smoothly.
On my CPU (i5 660) Speedstep scales the speed in 9 steps from 1.2 to 3.33 GHz.
I didn't try any of the ACPI suspend/resume features yet.

BIOS SETTINGS

Enabling the VT-d option seems to cause major stability problems.
The VT-x option on the other hand seems to work fine and is detected by virtualbox.

RAM

The BIOS doesn't allow to set the frequency or timings of the modules, so be sure to buy one that is tested by intel, or you might end up buying 1333 modules that will run at 1066 !
This is due to the fact that the board reads the modules SPD data in order to figure out its capabilities, and some memory brands, even famous ones (like OCZ), set the wrong data in the SPD.

TURBO BOOST

It seems to work fine, even if you will not find out by looking at /proc/cpuinfo !
To check if it is really working, you can try this program: http://code.google.com/p/i7z/
You will have to change 1 line to disable the processor check (it is meant for i7 and will not work on the newer i3 and i5).

My board revision is 204 and BIOS version is 0028

Intel_DH55TC (last edited 2010-08-08 13:28:30 by 78)