Intel_DH55TC
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The system freezes when gnome is launched with the kernel included in 9.10 and 10.04 alpha 2.<<BR>> |
The system freezes when gnome is launched with Karmic.<<BR>> |
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| To do this press F6 when the live media presents the boot menu, then choose ACPI=off from the menu that comes up, or press ESC and add the option manually.<<BR>> | |
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| Once the system is installed, the main problem with having ACPI disabled is that only 1 of the physiscal/logical cores will be used, and speedstep will not work.<<BR>> | Once the system is installed, a kernel from the updates will fix the problem.<<BR>> |
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| A good fix is to install a recent kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/ <<BR>> | Another fix is to install a recent kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/ <<BR>> This might also improve the stability of the GPU since many fixes have been released in the 2.6.33 kernels. |
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| 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 |
2. select v2.6.33/ (latest at present, you might try a more recent one) 3. download linux-image-2.6.33-020633-generic_2.6.33-020633_amd64.deb (or one matching the chosen version) 4. sudo dpkg -i linux-image-2.6.33-020633rc8-generic_2.6.33-020633_amd64.deb |
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| Direct rendering also works OK. Tested with warzone2100.<<BR>> Kernel mode setting: to be tested. |
Direct rendering works OK: tested with Warzone 2100 and Quake 3.<<BR>> There were reports of frequent freezes after few minutes of playing with Quake3, but at present, with Lucid Alpha 3, stock kernel and all updates Quake 3 is able to run overnight without crashing.<<BR>> Quake 3 has very playable frame-rates at 1920x1080 with maximum settings. Doom 3 and Quake Wars Enemy Territory seem to crash during start-up. |
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| I only tested the rear analogue sound output (the green jack), and works fine.<<BR>> | The rear analogue sound output (the green jack) works fine.<<BR>> |
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| There are reports that when running 2.6.33 the latest version of the driver from Intel has to be used for networking to work. | |
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| With the kernel mentioned above on my CPU (i5 660) Speedstep scales the speed in 9 steps from 1.2 to 3.33 GHz.<<BR>> I didn't try any of the suspend/resume features yet. === STABILITY === I experienced some major stability problems consisting in errors by memtest86 and inability to successfully complete the boot process, which seem to have gone away on 2 occasions after a hard power-off.<<BR>> I fiddled with various BIOS settings during that time, so I suspect some BIOS settings take effect only after a hard power-off. I will keep investigating.<<BR>> |
With the kernel mentioned above on an i5 660 Speedstep scales the speed in 9 steps from 1.2 to 3.33 GHz.<<BR>> Using module w83627ehf it is possible to monitor the CPU temperature, but not the fans. For the voltages to be monitored properly a suitable sensors3.conf seems to be needed but none can be found at present. suspend/resume features not tested yet. |
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| Turbo boost: works<<BR>> | Turbo boost: works (see below)<<BR>> |
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| VT-d: not tested |
VT-d: not tested. Software support for this new extension seems to be non-existent at present. |
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| My OCZ OCZ3P1333LV4GK is branded 1333 but runs at 1066.<<BR>> | Untested memory might run at 1066 even if branded 1333 !<<BR>> |
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| A future BIOS update might enable memory frequency override. | A future BIOS update might enable memory frequency override.<<BR>> It is possible however to reprogram the SPD of memory modules which happens to be incredibly easy with Linux.<<BR>> All you need is the DDR3 SPD specs (a document called 4_01_02_11R18.pdf that can be found at jedec.org), and the i2c-tools (a standard Ubuntu package). This also requires some knowledge of hexadecimal/binary numbers manipulation and is not generally user-friendly.<<BR>> A few tips in case you want to try: 1. you need to modprobe i2c-dev and i2c-i801 2. the addresses you need are: 0x50 0x51 0x52 0x53, corresponding to the 4 memory slots. 3. don't forget to change the checksum, just to be sure, since modules with the wrong checksum appear to work fine 4. change the SPD of *only 1 module*, and test it with the other module removed. If the system is unbootable, install the other module and when 2 modules with different timings are installed, the slowest timings of the 2 are used. This will allow you to change the timings back to a slower setting. 4. take your time, don't rush, double check every number you type, this procedure could potentially brick your hardware.<<BR>> Memory reported to have wrong SPD data:<<BR>> OCZ OCZ3P1333LV4GK<<BR>> http://www.ocztechnology.com/products/memory/ocz_ddr3_pc3_10666_platinum_low_voltage_dual_channel <<BR>> Running one of those heat-spreader fitted modules publicized as having good timing like 7-7-7 at 1.65v is highly discouraged. These memories will likely produce error at 1.5v even when lowering their frequency/timings.<<BR>> Modules reported as compatible in Intel website will likely produce best results.<<BR>> Kingston KVR1333d3n9k2/4g is reported to work very well with this board. |
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| It seems to work fine, even if you will not find out by looking at /proc/cpuinfo !<<BR>> To check if it really is working, you can try this program: http://code.google.com/p/i7z/ <<BR>> 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).<<BR>> My board revision is 204 and BIOS version is 0028 ---- /!\ '''Edit conflict - other version:''' ---- ---- CategoryHardware ---- /!\ '''Edit conflict - your version:''' ---- ---- CategoryHardware ---- /!\ '''End of edit conflict''' ---- |
It seems to work fine, even if you will not find out by looking at /proc/cpuinfo or any of the cpufreq entries in /sys !<<BR>> To check if it really is working, you can try this utility: http://code.google.com/p/i7z/ <<BR>> |
Intel DH55TC motherboard
The system freezes when gnome is launched with Karmic.
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 installing the system using a live media.
Once the system is installed, a kernel from the updates will fix the problem.
Another fix is to install a recent kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/
This might also improve the stability of the GPU since many fixes have been released in the 2.6.33 kernels. Steps to do this:
- select v2.6.33/ (latest at present, you might try a more recent one)
- download linux-image-2.6.33-020633-generic_2.6.33-020633_amd64.deb (or one matching the chosen version)
- sudo dpkg -i linux-image-2.6.33-020633rc8-generic_2.6.33-020633_amd64.deb
- reboot
GRAPHICS
2D and Compiz effects work well. Tested with 1920x1080 display connected through DVI.
Direct rendering works OK: tested with Warzone 2100 and Quake 3.
There were reports of frequent freezes after few minutes of playing with Quake3, but at present, with Lucid Alpha 3, stock kernel and all updates Quake 3 is able to run overnight without crashing.
Quake 3 has very playable frame-rates at 1920x1080 with maximum settings. Doom 3 and Quake Wars Enemy Territory seem to crash during start-up.
SOUND
The rear analogue sound output (the green jack) works fine.
Left to be tested are: the front panel analogue header, he SPDIF header, and the HDMI sound output.
NETWORK CARD
Just works.
There are reports that when running 2.6.33 the latest version of the driver from Intel has to be used for networking to work.
ACPI
With the kernel mentioned above on an i5 660 Speedstep scales the speed in 9 steps from 1.2 to 3.33 GHz.
Using module w83627ehf it is possible to monitor the CPU temperature, but not the fans. For the voltages to be monitored properly a suitable sensors3.conf seems to be needed but none can be found at present. suspend/resume features not tested yet.
BIOS SETTINGS
Hyperthreading: works
Turbo boost: works (see below)
Virtualization: works, virtualbox detected VT-x
VT-d: not tested. Software support for this new extension seems to be non-existent at present.
RAM
The BIOS doesn't allow setting the modules frequency or timings, so be sure to buy one that is tested by intel.
Untested memory might run at 1066 even if branded 1333 !
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, set the wrong data in the SPD.
A future BIOS update might enable memory frequency override.
It is possible however to reprogram the SPD of memory modules which happens to be incredibly easy with Linux.
All you need is the DDR3 SPD specs (a document called 4_01_02_11R18.pdf that can be found at jedec.org), and the i2c-tools (a standard Ubuntu package). This also requires some knowledge of hexadecimal/binary numbers manipulation and is not generally user-friendly.
A few tips in case you want to try:
- you need to modprobe i2c-dev and i2c-i801
- the addresses you need are: 0x50 0x51 0x52 0x53, corresponding to the 4 memory slots.
- don't forget to change the checksum, just to be sure, since modules with the wrong checksum appear to work fine
- change the SPD of *only 1 module*, and test it with the other module removed. If the system is unbootable, install the other module and when 2 modules with different timings are installed, the slowest timings of the 2 are used. This will allow you to change the timings back to a slower setting.
take your time, don't rush, double check every number you type, this procedure could potentially brick your hardware.
Memory reported to have wrong SPD data:
OCZ OCZ3P1333LV4GK
http://www.ocztechnology.com/products/memory/ocz_ddr3_pc3_10666_platinum_low_voltage_dual_channel
Running one of those heat-spreader fitted modules publicized as having good timing like 7-7-7 at 1.65v is highly discouraged. These memories will likely produce error at 1.5v even when lowering their frequency/timings.
Modules reported as compatible in Intel website will likely produce best results.
Kingston KVR1333d3n9k2/4g is reported to work very well with this board.
TURBO BOOST
It seems to work fine, even if you will not find out by looking at /proc/cpuinfo or any of the cpufreq entries in /sys !
To check if it really is working, you can try this utility: http://code.google.com/p/i7z/
Intel_DH55TC (last edited 2010-08-08 13:28:30 by 78)