Re: Anyone else seen this.

On 03/07/2026 21:15, John Rumm 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.
> 
> Not noticed any particular pattern of reboots with the current one 
> (2927), the previous 2865 might have restarted more frequently - but 
> even then only 2 or 3 times a year.
> 
> (I think if they detect a sequence of boot time fails, they will revert 
> to the previous version of the firmware just in case it was a firmware 
> update that caused the problem)
> 
> The FTTP sometimes drops out for 10 mins at midnight once every few 
> weeks, but I expect that is a ISP issue or something on the PON.
> 
> I have a temperature sensor plugged into one of the USB ports on the 
> router, and the graph is showing a daily cycle between 40.2 and 40.6 deg 
> C at the moment. (it is in a 12U 19" comms cab - but the door is open)
> 

Hi John
	how does that temperature sensor bit work please?

There is a 'USB Application | Temperature Sensor' menu entry on my 
Draytek, but I don't know what it needs to work...

     Thanks
     J^n