I think that I was experiencing this problem. I tried the workarounds mentioned above, but none of them really "worked". But I do not seem to be experiencing this issue when I switched to using DVI instead of HDMI. For what is worth, I am running Xubuntu 14.04 on a Dell Studio-XPS.
I think that I was experiencing this problem. I tried the workarounds mentioned above, but none of them really "worked". But I do not seem to be experiencing this issue when I switched to using DVI instead of HDMI. For what is worth, I am running Xubuntu 14.04 on a Dell Studio-XPS.