Dell Latitude D620 with 4GB RAM

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My Dell Latitude D620 at work had a 1024MB DDR2-667 PC2-5300 SO-DIMM. I purchased two 2048MB DDR2-677 PC2-5300 SO-DIMMs to try to expand RAM to 4096MB.
My Dell Latitude D620 at work had a 1024MB DDR2-667 PC2-5300 SO-DIMM. I purchased two 2048MB DDR2-677 PC2-5300 SO-DIMMs to try to expand RAM to 4096MB.
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My operating system is Ubuntu hardy (development branch) running kernel 2.6.24-15.
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My operating system is Ubuntu hardy (development branch) running kernel 2.6.24-15-generic.
With BIOS Revision A02 and 3072MB RAM installed, I was able to use ~ 3033.5MB.
With BIOS Revision A02 and 3072MB RAM installed, I was able to use ~ 3033.5MB.
$ '''head -1 /proc/meminfo'''
$ '''head -1 /proc/meminfo'''
MemTotal: 3106300 kB
MemTotal: 3106300 kB
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Surprisingly, with BIOS Revision A02 and 4096MB RAM installed, I was only able to use ~ 3033.7MB!
Surprisingly, with BIOS Revision A02 and 4096MB RAM installed, I was only able to use ~ 3033.7MB!
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$ '''head -1 /proc/meminfo'''
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$ '''head -1 /proc/meminfo'''
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MemTotal: 3106528 kB
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MemTotal: 3106464 kB
After upgrading my BIOS to the BIOS Revision A09 (D620_A09.EXE) using the process [http://www.linuxinsight.com/how-to-flash-motherboard-bios-from-linux-no-dos-windows-no-floppy-drive.html here], I was still only able to use ~3287.5MB.
After upgrading my BIOS to the BIOS Revision A09 (D620_A09.EXE) using the process [http://www.linuxinsight.com/how-to-flash-motherboard-bios-from-linux-no-dos-windows-no-floppy-drive.html here], I was still only able to use ~3287.5MB.
$ '''head -1 /proc/meminfo'''
$ '''head -1 /proc/meminfo'''
MemTotal: 3366396 kB
MemTotal: 3366396 kB
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 +
Note: Running kernel 2.6.24-15-generic did not significantly change the amount of available RAM.
== Links ==
== Links ==
* [http://www.linuxinsight.com/how-to-flash-motherboard-bios-from-linux-no-dos-windows-no-floppy-drive.html How to flash motherboard BIOS from Linux (no DOS/Windows, no floppy drive)?]
* [http://www.linuxinsight.com/how-to-flash-motherboard-bios-from-linux-no-dos-windows-no-floppy-drive.html How to flash motherboard BIOS from Linux (no DOS/Windows, no floppy drive)?]

Current revision

My Dell Latitude D620 at work had a 1024MB DDR2-667 PC2-5300 SO-DIMM. I purchased two 2048MB DDR2-677 PC2-5300 SO-DIMMs to try to expand RAM to 4096MB.

My operating system is Ubuntu hardy (development branch) running kernel 2.6.24-15-generic.

With BIOS Revision A02 and 3072MB RAM installed, I was able to use ~ 3033.5MB.

$ head -1 /proc/meminfo
MemTotal:      3106300 kB

Surprisingly, with BIOS Revision A02 and 4096MB RAM installed, I was only able to use ~ 3033.7MB!

$ head -1 /proc/meminfo
MemTotal:      3106464 kB

After upgrading my BIOS to the BIOS Revision A09 (D620_A09.EXE) using the process here, I was still only able to use ~3287.5MB.

$ head -1 /proc/meminfo
MemTotal:      3366396 kB

Note: Running kernel 2.6.24-15-generic did not significantly change the amount of available RAM.

Links

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