I tryed also today the new snapshot for MR3420 v2 after flashing all ethernets ports died,
access using serial port :

Dmesg:

[    0.810000] eth0: Atheros AG71xx at 0xb9000000, irq 4, mode:MII
[    1.370000] ag71xx ag71xx.0 eth0: invalid speed specified
[    1.370000] ag71xx: probe of ag71xx.0 failed with error -22
[    1.380000] eth0: Atheros AG71xx at 0xba000000, irq 5, mode:GMII
[    1.930000] ag71xx ag71xx.1 eth0: invalid speed specified
[    1.940000] ag71xx: probe of ag71xx.1 failed with error -22

root@OpenWrt:/etc/config# ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:2640 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2640 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:179520 (175.3 KiB)  TX bytes:179520 (175.3 KiB)

root@OpenWrt:/etc/config# ifconfig eth0
ifconfig: eth0: error fetching interface information: Device not found
root@OpenWrt:/etc/config# ifconfig eth1
ifconfig: eth1: error fetching interface information: Device not found
root@OpenWrt:/etc/config# ifconfig lan
ifconfig: lan: error fetching interface information: Device not found
root@OpenWrt:/etc/config# ifconfig wan
ifconfig: wan: error fetching interface information: Device not found
root@OpenWrt:/etc/config#

(Last edited by madmax on 14 Mar 2013, 09:39)