# Ubuntu uhd\_fft screen goes gray **URL:** \ **Category:** GNU Radio\ **Created:** [March 1, 2013, 3:01am UTC](https://www.ruby-forum.com/t/ubuntu-uhd-fft-screen-goes-gray/227028 "2013-03-01T03:01:37Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Patrik\_T](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/f6c823/32.png) [@Patrik\_T](https://www.ruby-forum.com/u/Patrik_T)\ **Post date:** [March 1, 2013, 3:01am UTC](https://www.ruby-forum.com/t/ubuntu-uhd-fft-screen-goes-gray/227028/1 "2013-03-01T03:01:37Z")
Hi to all, Do you have suggestions how to tame our ubuntu to perform better, untick features? We’re using usrp1, even at 1 MHz bandwith the uhd\_fft window goes gray (in accessible) after a 1/2 minute, force quit and try again is the only option. The computer we use is smart enough to handle that data rate… I have tested my usrp1 on fedora (less smart computer) at 8MHz bw for weeks and it still is happy. I’m very tempted to plug in fedora 17 or 18… Patrik ---
**Author:** ![Patrik\_T](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/f6c823/32.png) [@Patrik\_T](https://www.ruby-forum.com/u/Patrik_T)\ **Post date:** [March 2, 2013, 2:52pm UTC](https://www.ruby-forum.com/t/ubuntu-uhd-fft-screen-goes-gray/227028/2 "2013-03-02T14:52:00Z")
Thanks Josh for your suggestions we’ll try them. I suspect now that this ain’t caused by ubuntu. We’ll format and reinstsall and report. Patrik ---
**Author:** ![Patrik\_T](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/f6c823/32.png) [@Patrik\_T](https://www.ruby-forum.com/u/Patrik_T)\ **Post date:** [March 1, 2013, 3:19am UTC](https://www.ruby-forum.com/t/ubuntu-uhd-fft-screen-goes-gray/227028/3 "2013-03-01T03:19:09Z")
On 02/28/2013 06:49 PM, Patrik T. wrote: > weeks and it still is happy. > I’m very tempted to plug in fedora 17 or 18… It may be having a really bad time with opengl. Try disabling window effects, compositioning, etc, -josh