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My experience with the RT-AC86U

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Here's what goes to mynvramerror.log on my device:
Code: 
...
3680
^[[H^[[J0 0 0 0 0
3681
^[[H^[[J0 0 0 0 0
3682
^[[H^[[J0 0 0 0 0
3683
^[[H^[[J0 0 0 0 0
3684
^[[H^[[J0 0 0 0 0
3685
^[[H^[[J0 0 0 0 0
3686
Stuck at 3686. Interesting to try though.
It really looks like a blocked operation by hardware with no timeout around it.
 
Viktor Jaep said:
Here's the log from where it hung at 8877... nothing to go on. Again, really good thinking!

View attachment 41834
Click to expand...
I like @Maverickcdn suggestion the best, but if you don't mind some extra troubleshooting, give this a try please.

Code: 
#!/bin/sh
trap '' HUP INT QUIT ABRT TERM
(i="0"
while true; do 
  i="$(( i + 1 ))"
  state1="$(nvram get vpn_client1_state)" 
  state2="$(nvram get vpn_client2_state)"
  state3="$(nvram get vpn_client3_state)"
  state4="$(nvram get vpn_client4_state)"
  state5="$(nvram get vpn_client5_state)"
  clear
  echo "$state1" "$state2" "$state3" "$state4" "$state5"
  echo "$i"
done)&>/tmp/mynvramerror.log &

exit 0
 
Last edited:
Doh, just realized FW version (user upgrade) can be dynamic though so Ill need to come up with a way to periodically update that if needed... just food for thought when you're thinking about static/dynamic values
 
SomeWhereOverTheRainBow said:
I like @Maverickcdn suggestion the best, but if you don't mind some extra troubleshooting, give this a try please.

Code: 
#!/bin/sh 
nohup (i="0"
while true; do 
  i="$(( i + 1 ))"
  state1="$(nvram get vpn_client1_state)" 
  state2="$(nvram get vpn_client2_state)"
  state3="$(nvram get vpn_client3_state)"
  state4="$(nvram get vpn_client4_state)"
  state5="$(nvram get vpn_client5_state)"
  clear
  echo "$state1" "$state2" "$state3" "$state4" "$state5"
  echo "$i"
done)&>/tmp/mynvramerror.log &

exit 0
Click to expand...
I also got a way to troubleshoot with trapping signals the router may be sending, but I think we are getting stuck on hangup.
 
SomeWhereOverTheRainBow said:
I like @Maverickcdn suggestion the best, but if you don't mind some extra troubleshooting, give this a try please.

Code: 
#!/bin/sh
nohup (i="0"
while true; do
  i="$(( i + 1 ))"
  state1="$(nvram get vpn_client1_state)"
  state2="$(nvram get vpn_client2_state)"
  state3="$(nvram get vpn_client3_state)"
  state4="$(nvram get vpn_client4_state)"
  state5="$(nvram get vpn_client5_state)"
  clear
  echo "$state1" "$state2" "$state3" "$state4" "$state5"
  echo "$i"
done)&>/tmp/mynvramerror.log &

exit 0
Click to expand...

It didn't seem to like this:

nvrampoc.sh: line 2: syntax error: unexpected word (expecting ")")
 
SomeWhereOverTheRainBow said:
I also got a way to troubleshoot with trapping signals the router may be sending, but I think we are getting stuck on hangup.
Click to expand...
How about running it like:

Code: 
nohup sh nvrampoc.sh

and leaving the error log in the code from your previous version?
 
Viktor Jaep said:
How about running it like:

Code: 
nohup sh nvrampoc.sh

and leaving the error log in the code from your previous version?
Click to expand...
So here's the results of that... the script locked at 813, and the nohup.out file is blank.
 
SomeWhereOverTheRainBow said:
You could try that, but first scroll back to previous post and use my revised version without nohup.
Click to expand...
OK... just tried that... locked at 2933... nothing in the error log.

1655149664027.png
 
I think SomeWhereOverTheRainBow meant the trap version.
trap '' HUP INT QUIT ABRT TERM
The log is different now.
...
148
^[[H^[[J0 0 0 0 0
149
^[[H^[[J0 0 0 0 0
150
^[[H^[[J0 0 0 0 0
151
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^>
0^M 0^M 0^M 0^M
2753^M
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: clear^M: not found
0^M 0^M 0^M 0^M
2754^M
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: clear^M: not found
0^M 0^M 0^M 0^M
2755^M
...
2898^M
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: clear^M: not found
0^M 0^M 0^M 0^M
2899^M
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: clear^M: not found
0^M 0^M 0^M 0^M
2900^M
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: clear^M: not found
0^M 0^M 0^M 0^M
2901^M
./loop.sh: line 24: ^M: not found
./loop.sh: line 24: ^M: not found
Click to expand...
The change starts from iteration 150-151 and then goes on for some time with "^M: not found" messages until it freezes at 2901.

P. S. Line 24 in my script is this one:
done)&>/tmp/mynvramerror.log &
I just put some comments in the beginning, because I didn't want to submit indefinite script and limited to 5000 iterations. The executable part was this:
Bash: 
trap '' HUP INT QUIT ABRT TERM
(i=0
while [ $i -le 5000 ]; do
  i=$(( i + 1 ))
  state1="$(nvram get vpn_client1_state)"
  state2="$(nvram get vpn_client2_state)"
  state3="$(nvram get vpn_client3_state)"
  state4="$(nvram get vpn_client4_state)"
  state5="$(nvram get vpn_client5_state)"
  clear
  echo "$state1" "$state2" "$state3" "$state4" "$state5"
  echo "$i"
done)&>/tmp/mynvramerror.log &

exit 0
 

Attachments

  • mynvramerror.log.txt
    353.1 KB · Views: 64
Last edited:
SomeWhereOverTheRainBow said:
Did you use my revised version in the edited post?
Click to expand...
Yup. I have a feeling we're dealing with something extremely low-level here. I'm just glad the timeout function is able to get past it. Not sure if this is worthy to bring up with RMerlin, and seeing if he would think it's worth pursuing sending this over to his contacts at Asus, or if there's a way for us submit a bug report? It's highly likely they probably already know about this, and either (a) won't do anything about it, or (b) can't do anything about it.
 
Oracle said:
I think SomeWhereOverTheRainBow meant the trap version.
trap '' HUP INT QUIT ABRT TERM
The log is different now.

The change starts from iteration 150-151 and then goes on for some time with "^M: not found" messages until it freezes at 2901.
Click to expand...
That's the version I ran as well, and didn't get all the fancy stuff in my error log. Running it again.

1655150547075.png

Just locked at 2309. Nothing fancy in the error log like @Oracle saw.
 
Try this

Code: 
#!/bin/sh
trap '' HUP INT QUIT ABRT TERM
(i="0"
while true; do 
  i="$(( i + 1 ))"
  for nv in 1 2 3 4 5; do unset "state$nv"; done
  state1="$(nvram get vpn_client1_state)" 
  state2="$(nvram get vpn_client2_state)"
  state3="$(nvram get vpn_client3_state)"
  state4="$(nvram get vpn_client4_state)"
  state5="$(nvram get vpn_client5_state)"
  clear
  echo "$state1" "$state2" "$state3" "$state4" "$state5"
  echo "$i"
done)&>/tmp/mynvramerror.log &

exit 0
 
SomeWhereOverTheRainBow said:
Try this

Code: 
#!/bin/sh
trap '' HUP INT QUIT ABRT TERM
(i="0"
while true; do
  i="$(( i + 1 ))"
  for nv in 1 2 3 4 5; do unset "state$nv"; done
  state1="$(nvram get vpn_client1_state)"
  state2="$(nvram get vpn_client2_state)"
  state3="$(nvram get vpn_client3_state)"
  state4="$(nvram get vpn_client4_state)"
  state5="$(nvram get vpn_client5_state)"
  clear
  echo "$state1" "$state2" "$state3" "$state4" "$state5"
  echo "$i"
done)&>/tmp/mynvramerror.log &

exit 0
Click to expand...
It barely got out of the gate on this try...

1655152004055.png
 
I can't reproduce that log with the not found messages. The loop just hangs up very early, few hundred iterations max. The one certain thing is, given enough iterations, it fails - guaranteed.

I would submit an error report to Asus for this. That's what I'm trained to do: find something wrong - report it to the people in charge.

See all the special characters from the log in the attachment.
 

Attachments

  • AC86Ugetnvramlog.png
    AC86Ugetnvramlog.png
    66.7 KB · Views: 67
Last edited:
Oracle said:
I can't reproduce that log with the not found messages. The loop just hangs up very early, few hundred iterations max. The one certain thing is, given enough iterations, it fails - guaranteed.

I would submit an error report to Asus for this. That's what I'm trained to do: find something wrong - report it to the people in charge.
Click to expand...
I got a couple of other ideas that haven't been explored but I am coming up short from my cellphone at the job.
 
Oracle said:
I can't reproduce that log with the not found messages. The loop just hangs up very early, few hundred iterations max. The one certain thing is, given enough iterations, it fails - guaranteed.

I would submit an error report to Asus for this. That's what I'm trained to do: find something wrong - report it to the people in charge.

See all the special characters from the log in the attachment.
Click to expand...
I wonder why your 86U produces these weird results in the log, yet mine doesn't? Could there be a slight variation in the hardware somewhere?
 
SomeWhereOverTheRainBow said:
I got a couple of other ideas that haven't been explored but I am coming up short from my cellphone at the job.
Click to expand...
You certainly earned the gold star of the day for coming up with creative troubleshooting solutions!! :cool:
 
I cannot quite explain how my log ended up like this but it must have something to do with my Windows machine.

I mean - look at the carriage return symbols. I think I have spoiled the script with an accidental CR character. Possibly the 2 parts of the log are concatenated from 2 different runs and one of them is a broken script.
 
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