That was a bad evening, I upgraded my debian box and X failed to start throwing below errors.
6017.269] (EE) modeset(0): drmSetMaster failed: Permission denied
[ 6017.269] (EE)
Fatal server error:
[ 6017.269] (EE) AddScreen/ScreenInit failed for driver 0
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Recently I found already running VNC landed with blank screen out of the moon. Debugging revealed after uninstalling some packages related with Window/Desktop managers, existing xstartup of VNC failed to call Desktop manager. Experienced frequently with Gnome. My VNC again came back to life with below xstartup which instructs VNC to call DM explicitly. Read the rest of this entry