The 25-year-old is in line for his second start of the season this evening with Blair sidelined with a stomach bug and knows he must take his opportunity to stake his claim for Scottish honours in November.
"It has been frustrating coming on the back of a good year and I have not had as much game time as I would have liked," said Laidlaw.
"Hopefully I can change that.
"If there is any chance of me playing in the Autumn Tests I need to be playing for Edinburgh in the next couple of weeks. That is the goal I'm focusing on.
"I'm not stupid, I know Mike is a quality player and it's not easy for the coaches.
"For me, it's about taking the chance and doing everything I can to help us beat Ulster, and keep the jersey."
Edinburgh lost their opening two Heineken Cup games, away to Cardiff Blues and at home to former European Champions Northampton last weekend.
Laidlaw came off the bench in each match but will target a starting role when the Europe's premier competition returns for Round 3 and 4 in December and Edinburgh face Castres Olympique in back-to-back fixtures.