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0answers
48 views

14.04 heavy flickering with catalyst driver [on hold]

I have a Dell Vostro 3550 with a Radeon HD 6630M/6650M/6750M/7670M/7690M board and 2 external monitors. After upgrading to 14.04 from 13.10 I got no 3d acceleration for Nouveau driver and heavy ...
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1answer
140 views

A problem with a strange flickering/undulating effect and a related question about drivers on Ubuntu

I have been having a very frustrating problem in Ubuntu. Sometimes, there is a graphical effect that can only be described as flickering or undulation. I think undulation is the most accurate one, ...
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0answers
370 views

Flickering Ubuntu 13.04 HD 7480D

Ubuntu (13.04) will constantly flicker and have tons of odd graphical errors when using the x.org graphic drivers. However, if I try to boot through recovery it won't flicker, but it runs very slow. ...
1
vote
1answer
899 views

screen flickers after waking from blank screen

Every time I lock my screen and then unlock it again I get a really annoying screen flicker that stays until the next reboot. It's not like a graphic glitch it's like the screen is refreshing at a ...