Linux On My Samsung

Did the sleep mode work without any tricks?

My NP535U3C shows a black screen after sleep...

Is this still relevant?

I installed Ubuntu on a NP535U3C-A04DE and it works well. The only thing is, that suspend doesn't work.

Is it safe to use samsung-tools, samsung-laptop and samsung-backlight?

Or is there another way to fix this without these?

Thanks!