Since the update 1.2.6 i can't mine anymore ? My friends have the same issu on his rig too ? Someone have a solution ? Thanks

Ubuntu 14.04

I use ethermine.org pool with the stratum proxy. I try to mining using the standard ethminer it's not working. I try to reboot it's not working. I try with the last 2 other update since 1.2.6 not working

I have 5 MSI R9 390x

Some other have the same issu i post on ethreum community forum :
https://forum.ethereum.org/discussion/7380/mining-problem-since-last-update