Comment 32 for bug 657976

Seeing the same behavior on a 1001p Eee PC.

Specifically, I am seeing very slow/inconsistent performance when using the launcher bar at the left edge of the screen. It takes 2 or 3 clicks on an icon for it to actually switch to or start the application that I clicked on. In Top I see mutter using up 50% or more of the cpu.

I tried setting clutter_vblank and see no improvment. However, after running mutter with the command
CLUTTER_VBLANK=NONE mutter --replace

I saw lots of errors in the terminal window, like these:

(mutter:6015): Clutk-DEBUG: CtkText: focus-in
Mesa 7.9-devel implementation error: Bad renderbuffer format: 21

Please report at bugzilla.freedesktop.org

(mutter:6015): dee-WARNING **: Unable to connect to peer (:1.20): Could not get owner of name ':1.20': no such name

(mutter:6015): dee-WARNING **: Unable to connect to peer (:1.20): Could not get owner of name ':1.20': no such name
(mutter:6015): Clutk-DEBUG: CtkText: focus-in
Window manager warning: Log level 16: g_object_weak_unref: couldn't find weak ref 0x7124c0(0xa1db3b8)
Window manager warning: Log level 8: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(mutter:6015): Clutter-CRITICAL **: clutter_actor_unparent: assertion `CLUTTER_IS_ACTOR (self)' failed

This last line shows up every time I mouse over or click one of the icons in the launcher bar on the left edge of the screen.