I have just upgraded the kernel on my 64-bit Ubuntu 13.04 to 3.8.0-22-generic. Now my unity panel, dash and launcher are missing and graphics are running really slowly. Compiz and openGL seem to be failing. I've tried reinstalling Catalyst 13.4 but that does not fix it. I also tried these commands:

dconf reset -f /org/compiz/

unity --reset-icons &disown

This happened once before and I think the above commands worked, but I'm not having and success this time.

The last command gives these errors:

[1] 2616

compiz (core) - Info: Loading plugin: core

compiz (core) - Info: Starting plugin: core

unity-panel-service: no process found

compiz (core) - Error: Another window manager is already running on screen: 0

compiz (core) - Info: Stopping plugin: core

compiz (core) - Info: Unloading plugin: core

unity --reset-ico (process:2656): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed

Please help!

UPDATE 1:30pm EST 25 May 2013: Well today I just started up as normal and everything is working; my launcher icons reset to default, which I am guessing was the result of the second command above. Weird. Florian, here is the output of the two commands you asked me to run (now after it seems to be working):

$ /usr/lib/nux/unity_support_test -p

OpenGL vendor string:   ATI Technologies Inc.

OpenGL renderer string: AMD Radeon HD 6670

OpenGL version string:  4.2.12217 Compatibility Profile Context 12.104



Not software rendered:    yes

Not blacklisted:          yes

GLX fbconfig:             yes

GLX texture from pixmap:  yes

GL npot or rect textures: yes

GL vertex program:        yes

GL fragment program:      yes

GL vertex buffer object:  yes

GL framebuffer object:    yes

GL version is 1.4+:       yes



Unity 3D supported:       yes

and...

$ sudo -- lshw -C display

  *-display               

   description: VGA compatible controller

   product: Turks XT [Radeon HD 6670]

   vendor: Advanced Micro Devices [AMD] nee ATI

   physical id: 0

   bus info: pci@0000:03:00.0

   version: 00

   width: 64 bits

   clock: 33MHz

   capabilities: pm pciexpress msi vga_controller bus_master cap_list rom

   configuration: driver=fglrx_pci latency=0

   resources: irq:54 memory:d0000000-dfffffff memory:fe9e0000-fe9fffff ioport:e000(size=256) memory:fe9c0000-fe9dffff

UPDATE 1 June 2013: I had the same problem today after upgrading to kernel 3.8.0-23-generic and was able to get things back by running the first command only, then reinstalling AMD Catalyst 13.4 once again.

Is there any way to prevent having to do this with each kernel update? Is this an Ubuntu bug or an AMD Catalyst bug?