I'm sorry but I will not flash the BIOS. I also don't think that BIOS has anything to do with the issue since the same machine has been running Gentoo, KDE Plasma, with 4.2 kernel before Ubuntu, nouveau driver, with no such issues.
I'll be upgrading 15.04 to 15.10 after it comes out and we'll see if 4.2 fixes this.
I'm sorry but I will not flash the BIOS. I also don't think that BIOS has anything to do with the issue since the same machine has been running Gentoo, KDE Plasma, with 4.2 kernel before Ubuntu, nouveau driver, with no such issues.
I'll be upgrading 15.04 to 15.10 after it comes out and we'll see if 4.2 fixes this.