I have installed ubuntu 11.04-desktop-amd64 in laptopSatellite c640. originally there were no problems during install. even all the driver has also been detected properly. with an internet connection through lan all fine, but after the restart and then boot with no internet connection ........ when the gdm login is always "hang" (frozen ).......... : (

for the record: I use lan to connect to the internet.

$ nm-tool

NetworkManager Tool

State: connected

- Device: eth0 [Auto eth0] ----------------------------------------------------
Type: Wired
Driver: atl1c
State: connected
Default: yes
HW Address: 00:26:6C:BE:41:E6

Capabilities:
Carrier Detect: yes
Speed: 100 Mb/s

Wired Properties
Carrier: on

IPv4 Settings:
Address: 192.168.1.3
Prefix: 24 (255.255.255.0)
Gateway: 192.168.1.1

DNS: 50.23.239.24
DNS: 208.67.222.222


- Device: wlan0 ----------------------------------------------------------------
Type: 802.11 WiFi
Driver: ath9k
State: unavailable
Default: no
HW Address: 68:A3:C4:AA:A9:31

Capabilities:

Wireless Properties
WEP Encryption: yes
WPA Encryption: yes
WPA2 Encryption: yes

Wireless Access Points

$ lshw
description: Computer
width: 64 bits
capabilities: vsyscall64 vsyscall32
*-core
description: Motherboard
physical id: 0
*-memory
description: System memory
physical id: 0
size: 1603MiB
*-cpu
product: AMD E-350 Processor
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 1
bus info: cpu@0
size: 800MHz
capacity: 800MHz
width: 64 bits
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl nonstop_tsc extd_apicid aperfmperf pni monitor ssse3 cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch ibs skinit wdt npt lbrv svm_lock nrip_save pausefilter cpufreq
*-pci:0
description: Host bridge
product: Pavilion DM1Z-3000 Host bridge
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 100
bus info: pci@0000:00:00.0
version: 00
width: 32 bits
clock: 66MHz
*-display
description: VGA compatible controller
product: ATI Technologies Inc
vendor: ATI Technologies Inc
physical id: 1
bus info: pci@0000:00:01.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:41 memory:80000000-8fffffff ioport:4000(size=256) memory:90300000-9033ffff
*-storage
description: SATA controller
product: SB7x0/SB8x0/SB9x0 SATA Controller [AHCI mode]
vendor: ATI Technologies Inc
physical id: 11
bus info: pci@0000:00:11.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: storage ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=64
resources: irq:19 ioport:4138(size=8) ioport:414c(size=4) ioport:4130(size=8) ioport:4148(size=4) ioport:4110(size=16) memory:9034a000-9034a3ff
*-usb:0
description: USB Controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: ATI Technologies Inc
physical id: 12
bus info: pci@0000:00:12.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=64
resources: irq:18 memory:90349000-90349fff
*-usb:1
description: USB Controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: ATI Technologies Inc
physical id: 12.2
bus info: pci@0000:00:12.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=64
resources: irq:17 memory:90348000-903480ff
*-usb:2
description: USB Controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: ATI Technologies Inc
physical id: 13
bus info: pci@0000:00:13.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=64
resources: irq:18 memory:90347000-90347fff
*-usb:3
description: USB Controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: ATI Technologies Inc
physical id: 13.2
bus info: pci@0000:00:13.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=64
resources: irq:17 memory:90346000-903460ff
*-serial
description: SMBus
product: SBx00 SMBus Controller
vendor: ATI Technologies Inc
physical id: 14
bus info: pci@0000:00:14.0
version: 42
width: 32 bits
clock: 66MHz
configuration: driver=piix4_smbus latency=0
resources: irq:0
*-multimedia
description: Audio device
product: SBx00 Azalia (Intel HDA)
vendor: ATI Technologies Inc
physical id: 14.2
bus info: pci@0000:00:14.2
version: 40
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=HDA Intel latency=64
resources: irq:16 memory:90340000-90343fff
*-isa
description: ISA bridge
product: SB7x0/SB8x0/SB9x0 LPC host controller
vendor: ATI Technologies Inc
physical id: 14.3
bus info: pci@0000:00:14.3
version: 40
width: 32 bits
clock: 66MHz
capabilities: isa bus_master
configuration: latency=0
*-pci:0
description: PCI bridge
product: SBx00 PCI to PCI Bridge
vendor: ATI Technologies Inc
physical id: 14.4
bus info: pci@0000:00:14.4
version: 40
width: 32 bits
clock: 66MHz
capabilities: pci normal_decode bus_master
*-pci:1
description: PCI bridge
product: ATI Technologies Inc
vendor: ATI Technologies Inc
physical id: 15
bus info: pci@0000:00:15.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:3000(size=4096) memory:90200000-902fffff ioport:90000000(size=1048576)
*-network DISABLED
description: Wireless interface
product: AR9285 Wireless Network Adapter (PCI-Express)
vendor: Atheros Communications Inc.
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 01
serial: 68:a3:c4:aa:a9:31
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=2.6.38-8-generic firmware=N/A latency=0 multicast=yes wireless=IEEE 802.11bgn
resources: irq:16 memory:90200000-9020ffff
*-pci:2
description: PCI bridge
product: ATI Technologies Inc
vendor: ATI Technologies Inc
physical id: 15.1
bus info: pci@0000:00:15.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:16 ioport:2000(size=4096) memory:90100000-901fffff
*-network
description: Ethernet interface
product: AR8152 v2.0 Fast Ethernet
vendor: Atheros Communications
physical id: 0
bus info: pci@0000:06:00.0
logical name: eth0
version: c1
serial: 00:26:6c:be:41:e6
size: 100Mbit/s
capacity: 100Mbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI duplex=full firmware=N/A ip=192.168.1.3 latency=0 multicast=yes port=twisted pair speed=100Mbit/s
resources: irq:40 memory:90100000-9013ffff ioport:2000(size=128)
*-usb:4
description: USB Controller
product: SB7x0/SB8x0/SB9x0 USB OHCI0 Controller
vendor: ATI Technologies Inc
physical id: 16
bus info: pci@0000:00:16.0
version: 00
width: 32 bits
clock: 66MHz
capabilities: ohci bus_master
configuration: driver=ohci_hcd latency=64
resources: irq:18 memory:90345000-90345fff
*-usb:5
description: USB Controller
product: SB7x0/SB8x0/SB9x0 USB EHCI Controller
vendor: ATI Technologies Inc
physical id: 16.2
bus info: pci@0000:00:16.2
version: 00
width: 32 bits
clock: 66MHz
capabilities: ehci bus_master cap_list
configuration: driver=ehci_hcd latency=64
resources: irq:17 memory:90344000-903440ff
*-pci:1
description: Host bridge
product: Family 12h/14h Processor Function 0
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 101
bus info: pci@0000:00:18.0
version: 43
width: 32 bits
clock: 33MHz
*-pci:2
description: Host bridge
product: Family 12h/14h Processor Function 1
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 102
bus info: pci@0000:00:18.1
version: 00
width: 32 bits
clock: 33MHz
*-pci:3
description: Host bridge
product: Family 12h/14h Processor Function 2
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 103
bus info: pci@0000:00:18.2
version: 00
width: 32 bits
clock: 33MHz
*-pci:4
description: Host bridge
product: Family 12h/14h Processor Function 3
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 104
bus info: pci@0000:00:18.3
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=k10temp
resources: irq:0
*-pci:5
description: Host bridge
product: Family 12h/14h Processor Function 4
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 105
bus info: pci@0000:00:18.4
version: 00
width: 32 bits
clock: 33MHz
*-pci:6
description: Host bridge
product: Family 12h/14h Processor Function 6
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 106
bus info: pci@0000:00:18.5
version: 00
width: 32 bits
clock: 33MHz
*-pci:7
description: Host bridge
product: Family 12h/14h Processor Function 5
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 107
bus info: pci@0000:00:18.6
version: 00
width: 32 bits
clock: 33MHz
*-pci:8
description: Host bridge
product: Family 12h/14h Processor Function 7
vendor: Hynix Semiconductor (Hyundai Electronics)
physical id: 108
bus info: pci@0000:00:18.7
version: 00
width: 32 bits
clock: 33MHz
*-scsi
physical id: 1
bus info: scsi@3
logical name: scsi3
capabilities: scsi-host
configuration: driver=usb-storage


this is my blacklist.conf
# This file lists those modules which we don't want to be loaded by
# alias expansion, usually so some other driver will be loaded for the
# device instead.

# evbug is a debug tool that should be loaded explicitly
blacklist evbug

# these drivers are very simple, the HID drivers are usually preferred
blacklist usbmouse
blacklist usbkbd

# replaced by e100
blacklist eepro100

# replaced by tulip
blacklist de4x5

# causes no end of confusion by creating unexpected network interfaces
blacklist eth1394

# snd_intel8x0m can interfere with snd_intel8x0, doesn't seem to support much
# hardware on its own (Ubuntu bug #2011, #6810)
blacklist snd_intel8x0m

# Conflicts with dvb driver (which is better for handling this device)
blacklist snd_aw2

# causes failure to suspend on HP compaq nc6000 (Ubuntu: #10306)
blacklist i2c_i801

# replaced by p54pci
blacklist prism54

# replaced by b43 and ssb.
blacklist bcm43xx

# most apps now use garmin usb driver directly (Ubuntu: #114565)
blacklist garmin_gps

# replaced by asus-laptop (Ubuntu: #184721)
blacklist asus_acpi

# low-quality, just noise when being used for sound playback, causes
# hangs at desktop session start (Ubuntu: #246969)
blacklist snd_pcsp

# ugly and loud noise, getting on everyone's nerves; this should be done by a
# nice pulseaudio bing (Ubuntu: #77010)
blacklist pcspkr

# EDAC driver for amd76x clashes with the agp driver preventing the aperture
# from being initialised (Ubuntu: #297750). Blacklist so that the driver
# continues to build and is installable for the few cases where its
# really needed.
blacklist amd76x_edac


what's wrong there? please ....... help me ..?