Ubuntu

NO SUPPORT FOR DDR2 IN UBUNTU Version 7

Asked by Nitin Jain

Does Ubuntu Version 7 Detect DDR2 Ram At 800MHz or not? If Yes How?
I have a 64 Bit pc running : AMD Athlon64X2- 4200+ cpu; Nvidia Ge-Force 6150 On Board Shared Graphics Card; Nvidia n-force networking controller; 2GB+2GB transcend DDR2-800Mhz ram; on a ASUS- M2NPV-VM motherboard. My monitor is Benq FP92W, a 19" Wide-Screen Monitor, having resolution 1440 X 900

I have 2 problems:

1. recently when i installed Ubuntu 64 Bit, Version 7; it didn't detected my Ram as DDR2 @800 MHz; rather as plain DDR@400MHz!!! While Windows XP detects it as DDR2@-800Mhz :-(.

2. My Ubuntu uses monitor resolution as low & not to it's full resolution as 1440 X 900. please tell me how to correct it...

Why is it so? Does Ubuntu Linux Lacks Support for DDR2-800 Ram or is there something else?
Also; there is no problem in the OS; it's running just plain & fine; but the only problem being that Ram is running at a speed of 400MHz only & Not it's Actual Speed of 800 MHz!
Is it a BUG, in Linux or just an unsupported functionality?

I came to know about this problem; when i ran the memory test and discovered to my surprise; the pc showing my RAM as being of DDR &at 400 MHz rather than that being DDR2 @800 MHz :-(

Please tell me how to resolve this problem

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This question was originally filed as bug #238534.

Revision history for this message
Charles Profitt (cprofitt) said : 		#1

1. I am not sure on your memory...

Did you run sudo lshw to see your ram speed? When I run that I am getting accurate speed for my memory.

2. You may need to force the refresh rate of your monitor if it is not letting your change your resolution at all.

Section "Screen"
    Identifier "Screen0"
    Device "Videocard0"
    Monitor "Monitor0"
    DefaultDepth 24
    Option "TwinView" "1"
    Option "TwinViewXineramaInfoOrder" "DFP-1"
    Option "metamodes" "CRT: 1280x1024_60 +1280+0, DFP: nvidia-auto-select +0+0"
    SubSection "Display"
        Depth 24
    EndSubSection
EndSection

note the 1280x1024_60

that sets the resolution and the refresh.

Revision history for this message
Jim Hutchinson (jphutch) said : 		#2

I am not an all out memory expert, but I don't believe any DDR2 memory runs at 800mhz. DDR2-800 memory, for example, runs at 400mhz. I believe the fastest is 667mhz. At least, I can't find any that runs faster. See http://en.wikipedia.org/wiki/DDR2_SDRAM for more info.

If you can tell us more about them memory (model and such) perhaps we can help verify what you should see. Not sure about the monitor. Sorry.

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