LinHES Forums :: View topic - Wireless / TV card conflict

Author:

parkinpants [ Sun Feb 12, 2006 8:35 am ]

Post subject:

Wireless / TV card conflict - sit0? R5A30.5

Hi,

I've been struggling to get a comfortable wifi setup on my via epia mII mini-itx system for some time now. My current problem is as follows, trial and error trauma in chronologocal order.

1. Tv card is set to 192.168.0.1 on mythtv-setup by default, this appears with 'static settings' under sit0 in the /etc/network/interfaces file

2. LAN router is at 192.168.0.1

3. I am using ndiswrapper for wifi

4. Tv works

5. If I setup my wifi card as per...

ifup wlan0
iwlist wlan0 scan
iwconfig wlan0 essid NETWORKNAME
dhclient wlan0

... then I see 192.168.0.2 successfully registered as the LAN address for mythbox on ifconfig

6. However, even though it says "bound to 192...etc), wireless doesn't actually work, if i do ping www.google.com i get nothing

7. The same thing happens if I have eth0 identified in the /interfaces file (even though not physicall connected). It is as if wlan0 only works if it is the only registered device in the /interfaces file (other than lo)

8. This can be solved by commenting out the sit0 static settings on the /interfaces file an then repeating wifi steps above.

9. However if I do this, then Tv doesn't work. I get - "the mythbackend is not running..check the IP address..etc"

10. If i now do ifdown sit0, and then do "iwlist wlan0 scan" i get "operation not permitted: wlan0 doesn't support scanning".

11. I then realised LAN and sit0 are both on 192.168.0.1, so I changed sit0 to 192.167.0.1 in mythtv-setup and /interfaces. Now the tv still won't work, but not with the error message - it just flickers for a sec and then returns back to the Main Menu.

12. What exactly is sit0? This wasn't identified on ifconfig with previous versions of KM. I just used to have "lo" for the mythbackend/tv server.

13. Bottom line, I can only have Tv or Wi-fi, not both. I appreciate I don't fully understand what lo and sit0 are so maybe that is my downfall.

14. I have tried using netcardconfig to set my /interfaces file but no solution there.

My /interfaces file at the moment.

Code:

# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)

# The loopback interface
# automatically added when upgrading

auto lo sit0 wlan0
iface lo inet loopback


#iface eth0 inet static
#       address 192.168.0.1
#       netmask 255.255.255.0
#       network 192.168.0.0
#       broadcast 192.168.0.255
#       gateway 192.168.0.254

iface sit0 inet static
        address 192.167.0.1
        netmask 255.255.255.0
        network 192.167.0.0
        broadcast 192.167.0.255
        gateway 192.167.0.254

iface wlan0 inet dhcp

Current output of "ifconfig"

Code:

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:595 errors:0 dropped:0 overruns:0 frame:0
          TX packets:595 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:249809 (243.9 KiB)  TX bytes:249809 (243.9 KiB)

sit0      Link encap:IPv6-in-IPv4
          inet addr:192.167.0.1  Mask:255.255.255.0
          inet6 addr: ::127.0.0.1/96 Scope:Unknown
          inet6 addr: ::192.168.0.2/96 Scope:Compat
          inet6 addr: ::192.168.0.1/96 Scope:Compat
          UP RUNNING NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:131 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

wlan0     Link encap:Ethernet  HWaddr 00:40:F4:D6:44:FB
          inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::240:f4ff:fed6:44fb/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:618038 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1152496 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:43493632 (41.4 MiB)  TX bytes:1667865997 (1.5 GiB)
          Interrupt:12 Memory:e1000000-e1010000

Current output of iwconfig

Code:

lo        no wireless extensions.

eth0      no wireless extensions.

sit0      no wireless extensions.

Warning: Driver for device wlan0 has been compiled with version 19
of Wireless Extension, while this program supports up to version 17.
Some things may be broken...

wlan0     IEEE 802.11b  ESSID:"PARKYSPLACE"
          Mode:Managed  Frequency:2.462 GHz  Access Point: 00:0F:B5:B6:00:BC
          Bit Rate:18 Mb/s   Sensitivity=-200 dBm

          RTS thr:2346 B   Fragment thr:2346 B
          Encryption key:off
          Power Management:off
          Link Quality:100/100  Signal level:-89 dBm  Noise level:-256 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

Please help geniuses.

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Wireless / TV card conflict - sit0? R5A30.5 http://forum.linhes.org/viewtopic.php?f=2&t=8455	Page 1 of 1

Author:	nickread [ Sun Feb 12, 2006 10:46 pm ]
Post subject:
Warning-limited knowledge l0 is the 'loopback interface' and is basically just an easy way of referring to the local machine without knowing anything else about it. So if you frontend is on the same machine as your backend, then you would (by default) use l0 (or 127.0.0.1) from the frontend to connect to the backend. sit0 is an IPV6 interface. Its there because IPV6 support is compiled into your kernal I think. You probably don't need it. You may have a default gateway/routing issue?

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