Pakistan gave Test debuts to opening batsman Imam-ul-Haq and medium-pacer Faheem Ashraf.
Boyd Rankin (2-58), already a Test global with England, took the historic first wicket as Ireland began on the front foot and it was the same man who removed the troublesome Asad Shafiq (62) to slow the recovering tourists.
Legendary Pakistani fast bowler Wasim Akram has slammed the Pakistan Cricket Board and his compatriots who became a part of the historic Test against Ireland at Malahide for not sporting the traditional green stripe on their sweaters on Saturday.
A question that was answered nearly immediately as this historic first Test against Pakistan finally got going, a day later than scheduled, at Malahide.
Pakistan, 67 for two at lunch, lost their third wicket soon afterwards when Haris was caught in the gully by Porterfield off Thompson.
Diving to make his crease as Tyrone Kane tried to throw down the stumps, Imam - nephew of Pakistan great Inzamam - collided with onrushing wicketkeeper Niall O'Brien.
And it quickly became 13/2 when Ireland's Tim Murtagh trapped debutant Imam-ul-Haq LBW with a ball that tailed back in right on the very next ball.
As luck would have it, Pakistan staged the second fight back, and this time they really did show stomach for the fight as Shadab and Ashraf stitched together an unbeaten 109-run stand for the seventh-wicket before the rain arrived and curtailed played by eleven overs.
And three overs later, it was wicket number six as captain Sarfraz Ahmed went for 20 runs after playing a poor shot, edging behind where Stirling was waiting with Thompson also adding his second wicket.
Duly reprieved, he went to fifty in just 52 balls, including seven fours, with Shadab following him to the landmark in 89 balls.
"I think the lads are both mentally drained and physically drained".
"When you stop and think about it you don't realise how much you put yourself through building up to day one, which was washed out and then building up to today and getting out there".
The Irish are the 11th nation to play the longest format of the game after the International Cricket Council awarded Ireland test status in June past year.
"It's been a fantastic first day".