I am using a Lenovo G550 which dual boots Win7 and PCLOS (ver 220.127.116.11 -pclos1.bfs with gnome desktop). My wife runs Win7 on her HP Inspiron. Over a period of 2-3 months we have had wifi problems. Sometimes we could connect, sometimes not. Sometimes, connections would be very slow. With telephone support help, both the DSL modem and wifi router were checked, reset, and reconfigured. All seemed OK for a short time until yesterday when both OSs on the Lenovo machine refused to connect. Win7 on the HP machine connected with a slow connection. In desperation, I just bought a new Netgear router and hooked it up. The HP machine connects as does Win7 on the Lenevo. However, PCLOS (with all current updates) still refuses to connect. Except, at the moment, I am working from a 2010 Live CD and it connects fine. I didn't think to try that before hooking up the new router. But, oh well, it's a better one.
I've gone through the first couple of pages of diagnostic steps presented by Coffeetime, but I haven't a clue how to interpret them. I would appreciate some guidance. The command results are as follows:
eth0 IEEE 802.11abg ESSID:"NETGEAR20"
Mode:Managed Frequency:2.417 GHz Access Point: 84:1B:5E:7E:13:6D
Retry long limit:7 RTS thr:off Fragment thr:off
Link Quality=69/70 Signal level=-41 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0
[root@BillLenovo bill]# cat /etc/modprobe.conf
install scsi_hostadapter /sbin/modprobe ahci; /sbin/modprobe ata_piix; /bin/true
install usb-interface /sbin/modprobe ehci_hcd; /sbin/modprobe uhci_hcd; /bin/true
options snd-ac97-codec power_save=1
alias pci:v000014E4d00004315sv000014E4sd000004B5bc02sc80i00 wl
alias eth0 wl
[root@BillLenovo bill]# cat /etc/modprobe.preload
# /etc/modprobe.preload: kernel modules to load at boot time.
# This file should contain the names of kernel modules that are
# to be loaded at boot time, one per line. Comments begin with
# a `#', and everything on the line after them are ignored.
# this file is for module-init-tools (kernel 2.5 and above) ONLY
# for old kernel use /etc/modules
[root@BillLenovo bill]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
WIRELESS_ENC_KEY=s:(password is correct)
[root@BillLenovo bill]# cat /etc/modprobe.d/blacklist
[root@BillLenovo bill]# service -f network
Shutting down interface eth0: [ OK ]
Shutting down interface eth1: [ OK ]
Shutting down loopback interface: [ OK ]
Bringing up loopback interface: [ OK ]
Configuring wireless regulatory domain [ OK ]
Bringing up interface eth0: Error for wireless request "Set Encode" (8B2A) :
SET failed on device eth0 ; Invalid argument.
[ OK ]
Bringing up interface eth1:
[root@BillLenovo bill]# ping 10.0.0.1
connect: Network is unreachable