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I've got an AMD Radeon R9 270X that works very well with the open-source Radeon driver.

However, I am going to occasionally be using an OpenCL application that requires the proprietary Catalyst drivers to function correctly. Is there a way to install the Catalyst drivers yet only use them when I explicitly choose?

Can this be done with a separate Grub menu entry, and if so, how?

  • It is possible to do in various ways, but why not always use fglrx? – Pilot6 Aug 23 '15 at 8:36
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I am not sure This is the thing you are looking for or not. But when I was trying to change the source of my graphics drive I did it form the software and updates and then additional drivers.

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Some month ago, I ask a pretty similar question in ubuntuforum.org, check if it correspond to your need. Not sure is enough easy, but maybe it can be improved/corrected.

http://ubuntuforums.org/showthread.php?t=2278560&p=13289074#post13289074

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