a sua pergunta não é única, pois muitas pessoas pediram a mesma coisa. Essencialmente, ele se resume ao ambiente de área de trabalho e principalmente aos serviços iniciados automaticamente.
o seguinte artigo explica bem link
Eu tenho um computador antigo que usa como declarado apenas 1 GB de memória RAM junto com um cartão mais fraco que não tem o opengl 1.4, eu acho.
computer
description: Mini Tower Computer
product: OptiPlex GX260
vendor: Winbond Electronics
serial: [REMOVED]
width: 32 bits
capabilities: smp-1.4 smp
configuration: administrator_password=enabled boot=normal chassis=mini-tower cpus=1 power-on_password=enabled uuid=[REMOVED]
*-core
description: Motherboard
product: 02X378
vendor: Winbond Electronics
physical id: 0
serial: [REMOVED]
*-firmware
description: BIOS
vendor: Winbond Electronics
physical id: 0
version: A09
date: 11/01/2004
size: 64KiB
capacity: 448KiB
capabilities: isa pci pnp apm upgrade shadowing escd cdboot bootselect edd int13floppytoshiba int5printscreen int9keyboard int14serial int17printer acpi usb agp ls120boot biosbootspecification netboot
*-cpu
description: CPU
product: Intel(R) Pentium(R) 4 CPU 2.40GHz
vendor: Intel Corp.
physical id: 400
bus info: cpu@0
version: 15.2.7
slot: Microprocessor
size: 2400MHz
capacity: 3060MHz
width: 32 bits
clock: 533MHz
capabilities: boot fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe pebs bts cid xtpr
configuration: id=0
*-cache:0
description: L1 cache
physical id: 700
size: 8KiB
capacity: 16KiB
capabilities: internal write-back data
*-cache:1
description: L2 cache
physical id: 701
size: 512KiB
capacity: 512KiB
capabilities: internal varies unified
*-memory
description: System Memory
physical id: 1000
slot: System board or motherboard
size: 1GiB
capacity: 1GiB
*-bank:0
description: DIMM SDRAM Synchronous 266 MHz (3.8 ns)
physical id: 0
slot: DIMM_A
size: 512MiB
width: 64 bits
clock: 266MHz (3.8ns)
*-bank:1
description: DIMM SDRAM Synchronous 266 MHz (3.8 ns)
physical id: 1
slot: DIMM_B
size: 512MiB
width: 64 bits
clock: 266MHz (3.8ns)
*-pci
description: Host bridge
product: 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 01
width: 32 bits
clock: 33MHz
configuration: driver=agpgart-intel
resources: irq:0 memory:f0000000-f7ffffff
*-display
description: VGA compatible controller
product: 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:16 memory:e8000000-efffffff memory:ff680000-ff6fffff
*-usb:0
description: USB controller
product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1
vendor: Intel Corporation
physical id: 1d
bus info: pci@0000:00:1d.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:16 ioport:ff80(size=32)
*-usb:1
description: USB controller
product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2
vendor: Intel Corporation
physical id: 1d.1
bus info: pci@0000:00:1d.1
version: 01
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:19 ioport:ff60(size=32)
*-usb:2
description: USB controller
product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3
vendor: Intel Corporation
physical id: 1d.2
bus info: pci@0000:00:1d.2
version: 01
width: 32 bits
clock: 33MHz
capabilities: uhci bus_master
configuration: driver=uhci_hcd latency=0
resources: irq:18 ioport:ff40(size=32)
*-usb:3
description: USB controller
product: 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller
vendor: Intel Corporation
physical id: 1d.7
bus info: pci@0000:00:1d.7
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm debug ehci bus_master cap_list
configuration: driver=ehci-pci latency=0
resources: irq:23 memory:ffa00800-ffa00bff
*-pci
description: PCI bridge
product: 82801 PCI Bridge
vendor: Intel Corporation
physical id: 1e
bus info: pci@0000:00:1e.0
version: 81
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master
resources: ioport:e000(size=4096) memory:ff800000-ff9fffff
*-network:0
description: Ethernet interface
product: 3CR990-TX-97 [Typhoon 168-bit]
vendor: 3Com Corporation
physical id: 7
bus info: pci@0000:01:07.0
logical name: eth1
version: 02
serial: [REMOVED]
size: 10Mbit/s
capacity: 100Mbit/s
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=typhoon duplex=half firmware=03.001.008 latency=64 link=no maxlatency=5 mingnt=10 multicast=yes port=twisted pair speed=10Mbit/s
resources: irq:16 ioport:ec80(size=128) memory:ff8c0000-ff8fffff
*-network:1
description: Ethernet interface
product: 82540EM Gigabit Ethernet Controller
vendor: Intel Corporation
physical id: c
bus info: pci@0000:01:0c.0
logical name: eth0
version: 02
serial: [REMOVED]
size: 100Mbit/s
capacity: 1Gbit/s
width: 32 bits
clock: 66MHz
capabilities: pm pcix msi bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=e1000 driverversion=7.3.21-k8-NAPI duplex=full ip=[REMOVED] latency=64 link=yes mingnt=255 multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:18 memory:ff8a0000-ff8bffff ioport:ec40(size=64)
*-isa
description: ISA bridge
product: 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: isa bus_master
configuration: driver=lpc_ich latency=0
resources: irq:0
*-ide
description: IDE interface
product: 82801DB (ICH4) IDE Controller
vendor: Intel Corporation
physical id: 1f.1
bus info: pci@0000:00:1f.1
version: 01
width: 32 bits
clock: 33MHz
capabilities: ide bus_master
configuration: driver=ata_piix latency=0
resources: irq:18 ioport:1f0(size=8) ioport:3f6 ioport:170(size=8) ioport:376 ioport:ffa0(size=16) memory:40000000-400003ff
*-serial UNCLAIMED
description: SMBus
product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 01
width: 32 bits
clock: 33MHz
configuration: latency=0
resources: ioport:dc80(size=32)
*-multimedia
description: Multimedia audio controller
product: 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller
vendor: Intel Corporation
physical id: 1f.5
bus info: pci@0000:00:1f.5
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm bus_master cap_list
configuration: driver=snd_intel8x0 latency=0
resources: irq:17 ioport:d800(size=256) ioport:dc40(size=64) memory:ffa00400-ffa005ff memory:ffa00000-ffa000ff
*-scsi:0
physical id: 1
logical name: scsi0
capabilities: emulated
*-disk
description: ATA Disk
product: ST380023A
vendor: Seagate
physical id: 0.0.0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: 3.33
serial: [REMOVED]
size: 74GiB (80GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 signature=000d1d7c
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /
version: 1.0
serial: [REMOVED]
size: 73GiB
capacity: 73GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2016-03-03 07:03:37 filesystem=ext4 lastmountpoint=/ modified=2016-03-03 07:21:31 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro,data=ordered mounted=2016-03-21 14:56:11 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 1021MiB
capacity: 1021MiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume
description: Linux swap / Solaris partition
physical id: 5
logical name: /dev/sda5
capacity: 1021MiB
capabilities: nofs
*-scsi:1
physical id: 2
logical name: scsi1
capabilities: emulated
*-cdrom
description: SCSI CD-ROM
physical id: 0.0.0
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/sr0
capabilities: audio
configuration: status=nodisc
Atualmente estou usando o Ubuntu 12.04 e tentei 14.04, mas ele fica completamente sem o meu sistema. Então eu estou procurando maneiras de ser capaz de atualizar sem ter que estar por trás das atualizações para poder usar as dependências mais novas para como cmake e outras coisas