I have the same problem.
$ lspci -k | grep VGA -A2 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Juniper PRO [Radeon HD 5750] Subsystem: Hightech Information System Ltd. Device 200a Kernel driver in use: radeon
$ uname -a Linux andrew-pc 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
update-alternatives --display x86_64-linux-gnu_gl_conf - http://pastebin.com/wW6wi0cN
I have the same problem.
$ lspci -k | grep VGA -A2
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Juniper PRO [Radeon HD 5750]
Subsystem: Hightech Information System Ltd. Device 200a
Kernel driver in use: radeon
$ uname -a
Linux andrew-pc 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
update-alternatives --display x86_64- linux-gnu_ gl_conf - http:// pastebin. com/wW6wi0cN