Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: jkn Newsgroups: comp.os.linux.misc,uk.d-i-y Subject: Re: Anyone else seen this. [Draytek rebooting] Date: Fri, 3 Jul 2026 22:29:24 +0100 Lines: 79 Message-ID: References: <1128k1p$3fgrb$1@dont-email.me> <11298qj$3mlcf$2@dont-email.me> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Trace: individual.net d/DaS0l6FZNeNCyC+63EwAPdQ073p4zOUva0ChtUvaYcyxwZz0 Cancel-Lock: sha1:86CEu35hDhd4XtivAyu0VzZ6oe4= sha256:4asq9fVC3bCPtdpVvZXVseSeEKlY8zpby/pZdtzKFaQ= User-Agent: Mozilla Thunderbird Content-Language: en-US In-Reply-To: <11298qj$3mlcf$2@dont-email.me> Xref: csiph.com comp.os.linux.misc:88623 uk.d-i-y:1241227 On 03/07/2026 22:16, The Natural Philosopher wrote: > On 03/07/2026 16:45, jkn wrote: >> On 03/07/2026 16:21, The Natural Philosopher wrote: >>> Recently my router (Draytek 2726) has been spontaneously rebooting. >>> >>> Examination of the logs show a kernel panic caused by 'attempt to >>> execute an illegal instruction'. >>> >>> My assumption, possibly erroneous, is that the actual firmware code >>> is corrupted >>> The router is rated only to +45°C but that is the recommended limit >>> for flash memory, and the room temperature has been up towards 40°C. >>> which doesn't leave a great deal of margin for router internal heat >>> production. >>> My query is whether anyone else has seen issues with flash memory in >>> the recent hear wave. >>> >>> Surely phones get hotter than this? >>> >>> Genuinely interested in other's experiences. >>> >> >> I have a Draytek 2927 series - it is not new to me, but was previously >> used in a commercial environment with no issues AFAIK. >> >> I have noticed a situation with mine where the connection both wired >> and wireless) appears to drop momentarily, on occasion (couple of >> times a week?) >> >> I recently looked at the log, and saw something similar to what you >> describe - the router was in fact rebooting, and the log shows >> something like: >> >>  > sys ver dbg >> >> Router Model: Vigor2927ax    Version: 4.5.2 English >> Profile version: 4.0.0    Status: 1 (0x9de71d0f) >> Router IP: 192.168.0.1    Netmask: 255.255.255.0 >> Firmware Build Date/Time: Feb 12 2026 17:45:01 >> Router Name: DrayTek >> Revision: 6562_fd593bfca2 drayos2015 >> Router serial no: None >> >> ---------firmware exception debug info on >> cpu0----------------------------- >> >> # etc. >> > Yes. that is significant. Its the next bit of the log before the > registers dump that is significant > > Mine said (in shorthand) 'The CPU tried to execute an instruction that > does not exist' > Yes, my log has: ---------firmware exception debug info on cpu0----------------------------- EPC=60034b60, Cause=00800014, Status=1100fc03, BadAddr=00000000, RetAddr=60034a58 exception id=5(ADES: Address Error Store) exception occured in TASK Level task_id=161, SP=0x629390b8(3188 bytes free, 5664 used bytes) system tick =26381273 CURRENT_VERSION : 4.5.2_RC5 get from address : 60017000 Dump CPU0 registers: ... but if you look eg. here: https://www.draytek.co.uk/support/guides/kb-troubleshoot-reboot they list a log like this - this seems a 'normal' feature of reboot issues, without considering flash failure.