GPU temp retain trigger doesn't work

[mahan]

Hi,
I am using Hashcat 3.40 on Ubuntu 17.04.
I installed my Nvidia driver with Ubuntu repository. (Because some reasons)
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When I start an attack , it says:

Code:

Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger disabled

and after some minutes , my 1080 overheats and hashcat says:

Code:

Temperature limit on GPU #1 reached, aborting...

I tried --gpu-temp-retain 80 , but it says (Watchdog: Temperature retain trigger disabled) again!
the command:

Code:

./hashcat64.bin -m 0 -a 3 --username -D 1,2 ?l --gpu-temp-retain 80 --potfile-path MD5.potfile Hash.txt ?l?l?l?l?l?l?l?l?l?l

Whats wrong?