I got it fixed. First, we have to make sure that the user inside lxc container belongs to the group video. To do this, do the following: ( assuming user is named ubuntu )
sudo usermod -a -G video ubuntu Then, add the following in the container config file i.e. /var/lib/lxc/mk7i_container/config. My container name is mk7i_container. #Video DRI lxc.cgroup.devices.allow = c 226:* rwm ##/dev/dri mounts lxc.mount.entry = /dev/dri dev/dri none bind,optional,create=dir Now, restart the container. And the graphics should work fine. > > ---------- Forwarded message ---------- > From: manik sheeri <sheeri185adi...@gmail.com> > To: lxc-users@lists.linuxcontainers.org > Cc: > Date: Thu, 22 Sep 2016 14:53:59 -0700 > Subject: [lxc-users] slow game graphics in lxc container > I have a privileged `lxc` container running on Ubuntu 16.0.4 LTS. > > I have noticed that the graphics of our game are very sluggish in > container compared to when running on host directly. > > Could anyone point a reference as to what could be the cause ? > > So I ran `glxgears` application inside the container. Though the > application ran fine but I saw the following info + errors on console: > > libGL error: failed to open drm device: Permission denied > libGL error: failed to load driver: nouveau > 4057 frames in 5.0 seconds = 811.356 FPS > 4238 frames in 5.0 seconds = 847.557 FPS > 4251 frames in 5.0 seconds = 850.081 FPS > 4254 frames in 5.0 seconds = 850.743 FPS > 4253 frames in 5.0 seconds = 850.431 FPS > 4255 frames in 5.0 seconds = 850.949 FPS > 4253 frames in 5.0 seconds = 850.450 FPS > 4254 frames in 5.0 seconds = 850.733 FPS > 4250 frames in 5.0 seconds = 849.960 FPS > 4247 frames in 5.0 seconds = 849.254 FPS > 4246 frames in 5.0 seconds = 849.129 FPS > > > _______________________________________________ > lxc-users mailing list > lxc-users@lists.linuxcontainers.org > http://lists.linuxcontainers.org/listinfo/lxc-users >
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