> это ядром резервируется?
> # grep reserved, /var/log/dmesg 
> Memory: 3823704k/5177344k available (5084k kernel code, 1057552k absent, 296088k reserved, 
> 7229k data, 1244k init) 
> Может это из-за встроенного видео?А Х.3. ...
Посмотрел на всех трёх моих -- видео интегрированное, но не совпадает. Где больше, где меньше.
>> 85852 
>> # grep reserved, /var/log/dmesg 
>> [    0.000000] Memory: 3047656k/3110464k available (3492k kernel code, 456k 
>> absent, 62352k reserved, 3241k data, 608k init) 
# grep -i videora /var/log/Xorg.0.log
(==) intel(0): VideoRam: 262144 KB
$ lspci |grep -i vga |{ read s a; lspci -v -s $s; }
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Device 2a84
        Flags: bus master, fast devsel, latency 0, IRQ 42
        Memory at fe400000 (64-bit, non-prefetchable) [size=4M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at d000 [size=8]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915
>> 259200 
>> # grep reserved, /var/log/dmesg 
>> [    0.000000] Memory: 12311368k/13107196k available (3492k kernel code, 534724k 
>> absent, 261104k reserved, 3241k data, 608k init)
$ lspci |grep -i vga |{ read s a; lspci -v -s $s; }
01:03.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Hewlett-Packard Company Device 31fb
        Flags: bus master, stepping, medium devsel, latency 64, IRQ 23
        Memory at e8000000 (32-bit, prefetchable) [size=128M]
        I/O ports at 3000 [size=256]
        Memory at f1ff0000 (32-bit, non-prefetchable) [size=64K]
        [virtual] Expansion ROM at f1e00000 [disabled] [size=128K]
        Capabilities: <access denied>
        Kernel driver in use: radeon
>> 22552 
>> # grep reserved, /var/log/dmesg 
>> [    0.000000] Memory: 1015540k/1040192k available (2506k kernel code,
>> 23564k reserved, 1326k data, 380k init, 134984k highmem) 
$ lspci |grep -i vga |{ read s a; lspci -v -s $s; }
00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02) (prog-if 00 [VGA controller])
        Subsystem: Intel Corporation 82945G/GZ Integrated Graphics Controller
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at feb80000 (32-bit, non-prefetchable) [size=512K]
        I/O ports at ec00 [size=8]
        Memory at e0000000 (32-bit, prefetchable) [size=256M]
        Memory at feb40000 (32-bit, non-prefetchable) [size=256K]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>