Ethernet I/F does not detect the cable disconnection

samirsamaha · ‎04-25-2016

Hi,

I am using P1020 and SDK 1.9. It seams that the Ethernet driver doesn't detect the cable disconnection. First I start the board with the Ethernet cable not connected. once the board is up and running I connect the Ethernet cable. The Ethernet driver is able to detect the connection and the Ethernet connection works as expected (speed, auto negotiation...). If I disconnect the Ethernet cable the Ethernet driver doesn't detect that the cable is disconnect. This worked well with SDK1.5. I had this problem as soon as I migrate to SDK 1.9.

Is there any known bug with the Ethernet driver with SDK 1.9?

Is there any work around?

Thanks,

Samir Samaha

yipingwang · ‎05-09-2016

Hello Samir Samaha,

Sorry for the delay. I verified SDK 1.9 pre-built images on P1020RDB-PD, the Ethernet connection can be detect correctly, please refer to the following.

b25805@star:/home/addon_4T/tftpboot/wyp/p1020rdb$ bft map -m 'P1020RDB-PD-1_eTSEC2,lan1' -c

(Connect networking cable)

Session Log: /home/b25805/P1020RDB-PD-1-kermitlog-_Ts44t, text (0)

----------------------------------------------------

root@p1020rdb-pd:~# ethtool eth1

Settings for eth1:

Supported ports: [ MII ]

Supported link modes: 10baseT/Half 10baseT/Full

100baseT/Half 100baseT/Full

1000baseT/Full

Supported pause frame use: Symmetric Receive-only

Supports auto-negotiation: Yes

Advertised link modes: 10baseT/Half 10baseT/Full

100baseT/Half 100baseT/Full

1000baseT/Full

Advertised pause frame use: No

Advertised auto-negotiation: Yes

Speed: 1000Mb/s

Duplex: Full

Port: MII

PHYAD: 0

Transceiver: external

Auto-negotiation: on

Supports Wake-on: g

Wake-on: d

Current message level: 0x0000003f (63)

drv probe link timer ifdown ifup

Link detected: yes

root@p1020rdb-pd:~# ifconfig eth1 100.1.1.100

root@p1020rdb-pd:~# ping 100.1.1.1

PING 100.1.1.1 (100.1.1.1) 56(84) bytes of data.

64 bytes from 100.1.1.1: icmp_seq=1 ttl=64 time=0.421 ms

64 bytes from 100.1.1.1: icmp_seq=2 ttl=64 time=0.187 ms

64 bytes from 100.1.1.1: icmp_seq=3 ttl=64 time=0.204 ms

64 bytes from 100.1.1.1: icmp_seq=4 ttl=64 time=0.202 ms

64 bytes from 100.1.1.1: icmp_seq=5 ttl=64 time=0.164 ms

^C

--- 100.1.1.1 ping statistics ---

5 packets transmitted, 5 received, 0% packet loss, time 3997ms

rtt min/avg/max/mdev = 0.164/0.235/0.421/0.095 ms

root@p1020rdb-pd:~#

b25805@star:/home/addon_4T/tftpboot/wyp/p1020rdb$

b25805@star:/home/addon_4T/tftpboot/wyp/p1020rdb$ bft map -m 'P1020RDB-PD-1_eTSEC2,lan1' -d

Unmapped: P1020RDB-PD-1_eTSEC2

Disconnect the Ethernet cable

Session Log: /home/b25805/P1020RDB-PD-1-kermitlog-z5iVS6, text (0)

----------------------------------------------------

root@p1020rdb-pd:~# ethtool eth1

Settings for eth1:

Supported ports: [ MII ]

Supported link modes: 10baseT/Half 10baseT/Full

100baseT/Half 100baseT/Full

1000baseT/Full

Supported pause frame use: Symmetric Receive-only

Supports auto-negotiation: Yes

Advertised link modes: 10baseT/Half 10baseT/Full

100baseT/Half 100baseT/Full

1000baseT/Full

Advertised pause frame use: No

Advertised auto-negotiation: Yes

Speed: 100Mb/s

Duplex: Full

Port: MII

PHYAD: 0

Transceiver: external

Auto-negotiation: on

Supports Wake-on: g

Wake-on: d

Current message level: 0x0000003f (63)

drv probe link timer ifdown ifup

Link detected: no

root@p1020rdb-pd:~#

Please compare your Kernel configuration file and dts file with the default.

Have a great day,
Yiping

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