Welcome to SMF! :welcome1:
Need a bit more info to better help you.
What type of smoker?
What type of fuel?
Was the chunks straight on the fuel source?
What cook temp were you running?
Was the thermometer calibrated?
I have a char griller with side fire box. I run with charcole and small oak logs. If I add chips I place them in a smoker box then on the charcole. If you put chips or chunks straight on the fire they will most likely flare up.. .. I will leave my stack damper open 100% and use the air intake on the fire box to control my temps. My target cook chamber temp for chicken is 275-300 and I cook to an internal temp of 165, some will cook to 175. The reason for the higher cook chamber temp is to get a crispier skin, otherwise the skin can feel almost rubbery.......
When you have your smoker running correctly you will see only a slight smoke. It will have a blue tint to it. That is where the phrase of Thin Blue Smoke (TBS)comes from. If you have a billowing white smoke allow it to settle down to a TBS. It is natural for the white smoke when you add some wood, but it should settle down after about 5-10 minutes. If it is still white smoke after that look at your air intake, you may need to close it slightly.
There are just a few things to work with. I would suggest sign up for the 5 Day E-course and practice, practice, practice...........