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Vigor 2927ac crashing with FW 4.3.2

  • davemg
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06 Dec 2021 08:18 #1 by davemg
Vigor 2927ac crashing with FW 4.3.2 was created by davemg
I installed FW 4.32 on my Vigor 2927ac a few days ago and so far every 24 hours or so the router crashes and reboots. Not sure if anyone else is having this issue but I am rolling back to 4.2.4.2.

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06 Dec 2021 08:46 #2 by piste basher
Replied by piste basher on topic Re: Vigor 2927ac crashing with FW 4.3.2
Unless there's a compelling reason to change I usually wait until the latest version appears on the UK site, so I haven't bothered with 4.3.2 yet. I am, however, keenly awaiting new firmware for the 2927ax :roll:

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06 Dec 2021 11:33 #3 by admin3
Replied by admin3 on topic Re: Vigor 2927ac crashing with FW 4.3.2
Please get in touch with support regarding your router crashing, the 4.3.2 firmware is currently in testing and may be released on the UK site shortly.
Looking around, it doesn't appear that restarts are being reported with 4.3.2 yet, it could be unique to your network configuration.

See this information for troubleshooting / reporting restart problems: https://www.draytek.co.uk/support/guides/kb-troubleshoot-reboot
Steps 2 and 3 being the most important. Syslog or something that establishes what's causing the restart, will help greatly with getting this resolved promptly.

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06 Dec 2021 17:53 #4 by davemg
Replied by davemg on topic Re: Vigor 2927ac crashing with FW 4.3.2

admin3 wrote:
Please get in touch with support regarding your router crashing, the 4.3.2 firmware is currently in testing and may be released on the UK site shortly.
Looking around, it doesn't appear that restarts are being reported with 4.3.2 yet, it could be unique to your network configuration.

See this information for troubleshooting / reporting restart problems: https://www.draytek.co.uk/support/guides/kb-troubleshoot-reboot
Steps 2 and 3 being the most important. Syslog or something that establishes what's causing the restart, will help greatly with getting this resolved promptly.



No problem, I am still on 4.3.2 and I have enabled all logging options that are going to my dedicated syslog server. I will collect logs at next unexpected reboot and contact support with the information gathered.

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15 Dec 2021 21:58 #5 by davemg
Replied by davemg on topic Re: Vigor 2927ac crashing with FW 4.3.2
It has taken a week or so for me to collect a debug log, most of the time the router crashes and locks up - e.g. I cannot ping the gateway, after a reboot (physical power off/on) the sys ver dbg command shows nothing. Today the router actually "recovered" (as in restarted) and I managed to collect a debug log (FYI I have logged a ticket with Draytek) :-

Code:
Type ? for command help > sys ver dbg Router Model: Vigor2927ac Version: 4.3.2 English Profile version: 4.0.0 Status: 1 (0x193f34e7) Router IP: 192.168.1.1 Netmask: 255.255.255.0 Firmware Build Date/Time: Nov 12 2021 12:21:40 Router Name: GrayTek2 Revision: 2398_c49ed32 master_V2927_432 Router serial no: None ---------firmware exception debug info on cpu0----------------------------- EPC=1100fc03, Cause=00000041, Status=637591d8, BadAddr=00000000, RetAddr=6066676c exception id=16(C2E) exception occured in IdleTask Timeout task_id=133, SP=0x636e31f8(3540 bytes free, 4256 used bytes) system tick =25027593 CURRENT_VERSION : 4.3.2_RC6 get from address : 60017000 Dump CPU0 registers: ----------------------------------------- $ 0: 00000000 fffffffe 000008b4 624f5d70 $ 4: 1100fc01 64355e60 ffffffff 63890000 $ 8: b35ffc07 001fe07b e1708c45 ca77b779 $12: ce597557 ca77b779 00000000 9734d55c $16: 00000010 00000004 ffffffff 63760000 $20: 63760000 63760000 00000009 0000ffff $24: 00000000 2114a95e 00000000 00000000 $28: 00000000 636e31f8 63758f90 6066676c List a possible caller functions: ---------------------------------- func( 0)=6066676c func( 1)=608d1208 func( 2)=60666980 func( 3)=60665304 func( 4)=608d16b8 func( 5)=60666910 func( 6)=608d42d4 func( 7)=604cf66c func( 8)=6137fe4c func( 9)=60f40000 func(10)=604cff4c func(11)=604f9f0c func(12)=604f9cec func(13)=61390000 func(14)=604ef418 func(15)=60667050 func(16)=60f384c0 func(17)=6139127c func(18)=60f38a1c func(19)=60f384c0 List backtrace functions: ---------------------------------- func( 0)=1100fc03 >


I notice the FW revision seems to state it is release candidate 6, I am running the officailly released FW from Draytek.com

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16 Dec 2021 10:48 #6 by admin3
Replied by admin3 on topic Re: Vigor 2927ac crashing with FW 4.3.2
That's unfortunate that it's hardlocking and the router's watchdog isn't always catching that. From my perspective it suggests there's some kind of memory leak, so watching the Dashboard's memory count may give some indication of when it's going to occur. Syslog may also help as there could be syslog messages sent just prior to the router becoming unresponsive.

The RC6 that's included there is just the internal version, it is definitely the release firmware that's recorded in the debug log. It just means that the 4.3.2 firmware was released when it reached release candidate 6.

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