AC68U rev. E1 PPPoE bug kernel: unregister_netdevice

[Taza777]

Hello there.
I'm using the latest V29E2 LTS fork firmware on my AC68U router and has encountered with a strange bug.
My ISP re-establish connections in every 7200 minutes (5 days). When this happens, the router gets into a state, which can be only fixed with a reboot (this happens if I manually re-establish WAN too).

Dec 11 15:37:46 pppd[705]: LCP terminated by peer
Dec 11 15:37:46 pppd[705]: Connect time 7200.1 minutes.
Dec 11 15:37:46 pppd[705]: Sent 1337472905 bytes, received 3680750593 bytes.
Dec 11 15:37:46 miniupnpd[7734]: Failed to get IP for interface ppp0
Dec 11 15:37:46 miniupnpd[7734]: SendNATPMPPublicAddressChangeNotification: cannot get public IP address, stopping
Dec 11 15:37:49 pppd[705]: Connection terminated.
Dec 11 15:37:50 WAN_Connection: Fail to connect with some issues.
Dec 11 15:37:50 stop_nat_rules: apply the redirect_rules!
Dec 11 15:37:51 stop_nat_rules: (/tmp/redirect_rules) success!
Dec 11 15:38:00 kernel: unregister_netdevice: waiting for ppp0 to become free. Usage count = 1
Dec 11 15:38:10 kernel: unregister_netdevice: waiting for ppp0 to become free. Usage count = 1
Dec 11 15:38:20 kernel: unregister_netdevice: waiting for ppp0 to become free. Usage count = 1
Dec 11 15:38:30 kernel: unregister_netdevice: waiting for ppp0 to become free. Usage count = 1
Dec 11 15:38:40 kernel: unregister_netdevice: waiting for ppp0 to become free. Usage count = 1

I found the topics on SNB with the same problem: 1, 2. But I didn't get any solution.

However a day ago I've noticed, that it happens only if I install and run transmission on my usb 3.0 hdd (entware isntalled, swap on, ext4 fs). So if I remove transmission and try to reconnect my WAN (or my ISP re-establish connection) it works well without any error.

Does anybody know why transmission cause this?

P.S The same problem on merlin firmware and previous forks v26, v27, v28.

 

[bbunge]

While not a fix a means to an end would be to set reboot scheduler to restart the router every night.

Sent from my P01M using Tapatalk

 

[Taza777]

While not a fix a means to an end would be to set reboot scheduler to restart the router every night.

Sent from my P01M using Tapatalk

Yes, I know about this option. The fact is I have a video surveillance system at my home which includes 4 cameras, that are always connected to the router. Unfortunately, cheap сhinese cameras sometimes can't reconnect to the access point correctly and "freeze" till the manually reboot. So this isn't the best solution in my case. I think to fix the problem of the router (transmission daemon conflict with smth) is easier than trying to set up a cheap cameras full of bugs.

 

[Taza777]

Add: tried to use usb 2.0 port and usb flash drive istead of usb-hdd - the same result.

 

[john9527]

Two things to try.....
- the 29D4 test build I put up has some ppp kernel updates (but same as lastest Merlin)
- it looks like transmission isn't correctly releasing...how are you opening ports for transmission (upnp or fixed port forwards). Whichever method, try the other.

 

[Taza777]

Two things to try.....
- the 29D4 test build I put up has some ppp kernel updates (but same as lastest Merlin)
- it looks like transmission isn't correctly releasing...how are you opening ports for transmission (upnp or fixed port forwards). Whichever method, try the other.

I tried both but result was the same. Now I solved this problem flashing latest 380.69 merlin firmware. Anyway, thanks for reply.