Dear Sir/Madam,

I'm new to LAVA. I'm still in initial stage to use lava in our farm. I use customized board with Qualcomm's chip.

Recently I met a question, a very simple job, sometimes when I start to operate uboot, the serial have chance to be closed. They I set retry in lava job, let it retry a lots of times, but looks never successfully open the serial again.

But, after job finish, I quickly open the serial in manual, it's ok!

I search your code a lot, and found in shell.py there is one comments, I want to know is this the reason that I failed to retry for serial? When will you fix it?