Também estou com o mesmo problema e não sei fazer meu Ubuntu 9.04 rodar de maneira satisfatória. Ele está sempre muito lento. Eis um pouco do meu computador:
description: Computer
width: 32 bits
*-core
description: Motherboard
physical id: 0
*-memory
description: System memory
physical id: 0
size: 191MiB
*-cpu
product: Intel(R) Celeron(R) CPU 2.13GHz
vendor: Intel Corp.
physical id: 1
bus info: cpu@0
version: 15.4.1
serial: 0000-0F41-0000-0000-0000-0000
size: 18EHz
width: 32 bits
capabilities: 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 constant_tsc up pebs bts pni dtes64 monitor ds_cpl cid xtpr
configuration: id=0
*-pci:0
description: Host bridge
product: CN700/VN800/P4M800CE/Pro Host Bridge
vendor: VIA Technologies, Inc.
physical id: 100
bus info: pci@0000:00:00.0
version: 00
width: 32 bits
clock: 66MHz
configuration: driver=agpgart-via latency=8 module=via_agp
*-pci
description: PCI bridge
product: VT8237/VX700 PCI Bridge
vendor: VIA Technologies, Inc.
physical id: 1
bus info: pci@0000:00:01.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: pci bus_master cap_list
*-display UNCLAIMED
description: VGA compatible controller
product: CN700/P4M800 Pro/P4M800 CE/VN800 [S3 UniChrome Pro]
vendor: VIA Technologies, Inc.
physical id: 0
bus info: pci@0000:01:00.0
version: 01
width: 32 bits
clock: 66MHz
capabilities: bus_master cap_list
configuration: latency=32 mingnt=2
*-communication UNCLAIMED
description: Communication controller
product: Conexant Systems, Inc.
vendor: Conexant Systems, Inc.
physical id: a
bus info: pci@0000:00:0a.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: latency=32
00:00.0 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
00:00.1 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237/VX700 PCI Bridge
00:0a.0 Communication controller: Conexant Systems, Inc. Device 2702 (rev 01)
00:0f.0 IDE interface: VIA Technologies, Inc. VIA VT6420 SATA RAID Controller (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge [KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 78)
01:00.0 VGA compatible controller: VIA Technologies, Inc. CN700/P4M800 Pro/P4M800 CE/VN800 [S3 UniChrome Pro] (rev 01)