I have exactly the same problem:
# uname -a Linux awe 3.19.0-30-generic #33~14.04.1-Ubuntu SMP Tue Sep 22 09:27:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
# uptime 18:14:25 up 3 days, 5:10, 5 users, load average: 0.44, 1.66, 3.07
# cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=14.04 DISTRIB_CODENAME=trusty DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"
# ps aux|grep /X root 8509 9.8 27.3 4607200 4248288 tty7 Ss+ Oct01 140:38 /usr/bin/X -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
# fglrxinfo display: :0 screen: 0 OpenGL vendor string: Advanced Micro Devices, Inc. OpenGL renderer string: AMD Radeon HD 7560D OpenGL version string: 4.4.13374 Compatibility Profile Context 15.20.1013
I have exactly the same problem:
# uname -a
Linux awe 3.19.0-30-generic #33~14.04.1-Ubuntu SMP Tue Sep 22 09:27:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
# uptime
18:14:25 up 3 days, 5:10, 5 users, load average: 0.44, 1.66, 3.07
# cat /etc/lsb-release RELEASE= 14.04 CODENAME= trusty DESCRIPTION= "Ubuntu 14.04.3 LTS"
DISTRIB_ID=Ubuntu
DISTRIB_
DISTRIB_
DISTRIB_
# ps aux|grep /X lightdm/ root/:0 -nolisten tcp vt7 -novtswitch
root 8509 9.8 27.3 4607200 4248288 tty7 Ss+ Oct01 140:38 /usr/bin/X -core :0 -seat seat0 -auth /var/run/
# fglrxinfo
display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7560D
OpenGL version string: 4.4.13374 Compatibility Profile Context 15.20.1013