Not 11.04 specific wired lan problem

[mariost]

Today I updated to 11.04 in hope of the problem resolving by itself. Didn't happen. The thing is, I even called the internet guys to check what's the matter, only to find out it worked fine under windows. In ubuntu however, page loading is Unnaturally slow and "ping google.com" (or whatever), returns result every 4 seconds. Strange is that Skype and online games (read HoN) work fine, with only problem is store loading 10seconds and during logging time. I will post all the command output I can think of, hope you can use it to help me

sudo iptables -L -v
Chain INPUT (policy DROP 5411 packets, 658K bytes)
 pkts bytes target     prot opt in     out     source               destination         
  749 32953 ACCEPT     all  --  lo     any     anywhere             anywhere            
 176K   34M ACCEPT     all  --  any    any     anywhere             anywhere            state RELATED,ESTABLISHED 
   65  5186 ACCEPT     udp  --  any    any     anywhere             anywhere            udp dpts:kamanda:10083 state NEW 
   29  1568 ACCEPT     tcp  --  any    any     anywhere             anywhere            tcp dpts:kamanda:amidxtape state NEW 

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 229K packets, 18M bytes)
 pkts bytes target     prot opt in     out     source               destination

dmesg | grep -v rtl

ifconfig
eth0      Link encap:Ethernet  HWaddr 00:26:6c:58:de:af  
          inet addr:91.134.40.116  Bcast:91.134.40.255  Mask:255.255.255.0
          inet6 addr: fe80::226:6cff:fe58:deaf/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:406653 errors:0 dropped:0 overruns:0 frame:0
          TX packets:229852 errors:0 dropped:0 overruns:0 carrier:1
          collisions:0 txqueuelen:1000 
          RX bytes:52204291 (52.2 MB)  TX bytes:22752502 (22.7 MB)
          Interrupt:44 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:802 errors:0 dropped:0 overruns:0 frame:0
          TX packets:802 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:36417 (36.4 KB)  TX bytes:36417 (36.4 KB)

wlan0     Link encap:Ethernet  HWaddr 70:f1:a1:9e:f0:65  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:17 Memory:ffffc900050f0000-ffffc900050f0100

discharge@dischargelap:~$ cat /proc/interrupts 
           CPU0       CPU1       CPU2       CPU3       
  0:         29         10          6          6   IO-APIC-edge      timer
  1:          2          2          2          2   IO-APIC-edge      i8042
  8:          0          0          1          0   IO-APIC-edge      rtc0
  9:          0          0          0          0   IO-APIC-fasteoi   acpi
 12:         39         45         45         43   IO-APIC-edge      i8042
 16:         80         16         17         17   IO-APIC-fasteoi   ehci_hcd:usb1
 17:       1698       1489        139         77   IO-APIC-fasteoi   wlan0
 21:          0          0          0          0   IO-APIC-fasteoi   ips
 23:     287879       3158        143        158   IO-APIC-fasteoi   ehci_hcd:usb2
 41:      34192      34134       1218       1216   PCI-MSI-edge      ahci
 42:         40         33       7898       2171   PCI-MSI-edge      hda_intel
 43:         23         13          7          7   PCI-MSI-edge      hda_intel
 44:     612301         68         86         70   PCI-MSI-edge      eth0
 45:     355051     867438     661347     477236   PCI-MSI-edge      fglrx[0]@PCI:1:0:0
NMI:          0          0          0          0   Non-maskable interrupts
LOC:    1207689     758841    1030978    1025362   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0   Performance monitoring interrupts
IWI:          0          0          0          0   IRQ work interrupts
RES:     523975      38637      60549      48078   Rescheduling interrupts
CAL:        494       9839      11959      12356   Function call interrupts
TLB:      63025       8470      71080      72962   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:         25         25         25         25   Machine check polls
ERR:          0
MIS:          0

lspci | grep Ethernet
02:00.0 Ethernet controller: Atheros Communications AR8152 v1.1 Fast Ethernet (rev c1)

Just tell me if I have missed something. Thank you in advance.

[mariost]

Fixed the problem - had to edit /etc/resolv.conf and reorded the nameservers so that the "good" one is first. Before i fixed I ran ping -n google so that i was sure it was DNS problem. Probably Windows just doesn't care about DNS server ordering, that's why it works there.
EDIT: had to use command 'sudo chattr +i /etc/resolv.conf' to prevent wicd/NM from modifying the file.