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Realtek LAN connection LED solid red

Posted on 2013-06-26
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Last Modified: 2013-07-23
Hi

I recently installed wheezy debian on a foxconn nt i1500 unit (1GB RAM)

In the past I have installed a number of devices with squeeze on previous models of the same line of foxconn nettop units

This one however presented an issue.

On this unit I installed moc (music on console) to stream a radio station at my client's site

After a few hours, the streamed signal begins to stutter as would a scratched record, repetitively playing the same sound.

When I checked the unit I noticed that the LAN activity LED was flashing orange but the Ethernet connection LED was solid red, instead of the normal green

I also noticed an important number of dropped packets for interface eth0

Googled results pointed towards the faulty r8169 driver, which I promptly replaced with the apparently better suited r8168 driver

The dropped packets issue has now disappeared while the red LED continues to glow.
I included the output from Ethtool below.
Any ideas ?

thanks
yann

root@xxxxx-radio:~# ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: Unknown
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000033 (51)
                               drv probe ifdown ifup
        Link detected: yes
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Question by:Yann Shukor
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by:BurundiLapp
ID: 39280703
Has the streaming issue actually been resolved fully and the only remaining issue is the red light?

Has the mahcine had it's power pulled for at least 2 mins?  It could simply be the Realtek NIC not resetting the light properly after an error condition.
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Author Comment

by:Yann Shukor
ID: 39282361
Thanks for your response; I was giving it enough time to assess the result

No the streaming issue hasn't been resolved, nor the red light

The unit has been switched off for at least 24hrs before being reconnected:  the red led ain't dead yet !

I did notice that if I reset the LAN interface by unplugging and then replugging the cable then the stream resumes normally

I'm going to configure the unit to use the wifi interface, maybe the Realtek nic is duff
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BurundiLapp earned 500 total points
ID: 39282729
I've had something similar with an Atheros NIC, setting the TX and RX buffers  to their max helped to alleviate the issue however the onboard NIC needed replacing with a PCI unit in the end as it just wasn't up to the task.
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