RAM shows less
Roberto Ragusa
mail at robertoragusa.it
Tue May 11 14:08:07 UTC 2010
Jatin K wrote:
>> Maybe the integrated graphics card is still stealing some RAM (256MiB?)
>> even if you don't use it.
>> A quick Google search of your "1564" appears to confirm that the
>> integrated graphics card is not useable.
>
> integrated graphics card is not usable ??? means ?????
> can understand what you wanna say
As far as I can see, your CPU has an integrated Intel
"graphics card". So you actually have the external ATI
one, which you use, and the integrated one, which you do not use.
Some laptops can switch between the two (performance/economy).
It looks like your laptop model always uses the external
one.
What I'm saying is that, _maybe_, the internal one is not
totally disabled and has still some memory allocated to it
at the hardware/BIOS level.
I may be totally wrong, but my idea comes from this site:
http://www.anandtech.com/show/2955
which says:
While the low clocks will reduce heat output and improve
battery life for the Inspiron 15, it bears mentioning
that there's no way to switch to using the integrated
graphics built into the Core i5 CPU and thus improve
battery life further. This is similar to what we saw with
NVIDIA's switchable graphics, which have only been in a
few products over the years. As we covered in our Optimus
Technology Overview, switchable graphics requires more
validation and testing, more motherboard layers, and several
multiplexer chips (typically two per video output). Given
all of the added work, it's perhaps not too surprising-though
it is disappointing-that Dell chose to keep costs down on the
Inspiron 15. Less expensive models are available with Intel
HD Graphics, for those that don't need a faster GPU.
> please have a look at the output[1] on "cat /var/log/dmesg"
>
> [1] http://cl1p.net/jk/
The good part is missing at the beginning of the log.
Try "dmesg -s 500000" to capture the entire thing.
--
Roberto Ragusa mail at robertoragusa.it
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