A man who punched a DJ at a southside venue over a dispute about talking to his girlfriend will spend his weekends in jail for the next seven months.
Acting Justice John Nield said in the Supreme Court on Wednesday the attack by Javarne Saipani at the Yarralumla Woolshed on September 9, 2011 was "unlawful, unexpected, unprovoked and vicious".
Saipani was 18-years-old and on a good behaviour bond when he asked the victim whether he had been talking to his girlfriend, to which the DJ replied "what?"
The offender then punched the victim once to the left side of the face, before another man laid another punch.
Both men then kicked the victim when he was lying on the ground. The victim had screws and plates inserted to fix a fractured jaw, and also suffered a nose fracture.
The court heard Saipani had warned the victim earlier in the year on Facebook about talking to his girlfriend.
Saipani pleaded guilty in May to an amended charge of recklessly inflicting actual bodily harm.
Justice Nield said the offender had "drunk more alcohol than he would normally have drunk", and had shown remorse with his guilty plea even though it was not done at the earliest time.
"I cannot say with any certainty that [the offender] has good prospects of rehabilitation, or is unlikely to reoffend," Justice Nield said.
The court heard the seriousness of Saipani's offences had been increasing.
Justice Nield reduced his 12 month sentence by two months for his guilty plea.
The seven months of periodic weekend detention starts this Friday, with the remaining three months' jail suspended on conditions including the completion of alcohol use and anger management courses.