Hi !

For a while, I've had screen corruptions leading to a total computer
freeze when playing WoW. I have more and more the impression that
this /could/ be caused by Growl notifications. For a few times now, I
have noticed that this freeze happens "a few milliseconds" after a
notification has appeared.

Unfortunately, I only have one Mac so I cannot log in from another
computer into my frozen computer to get a sample. My frozen computer
is only frozen in the video layer, because the sounds form the game
continues, so do the other applications running along WoW such as
Skype or Ventrilo for instance.

If I leave my computer on, this visual freeze slowly propagates like a
disease to all the aspects of the computer until it becomes frozen
stiff from side to side (every other app eventually hang too). There
is no point in waiting, though, because I cannot do anything anyway
when this video freeze happens : I cannot switch to another app, I
cannot use the dialog that usually appears when one briefly presses
the power button. The only thing I can do is doing a hard shut-down.

As an example, this is what happened tonight. I was playing WoW (of
course), and the application was frontmost (of course). SuperDuper was
running in the background to do the daily backup of my User folder to
my network disk. At 20:27, the screen froze (when this happens, the
image becomes scrambled as if the wrong textures were accessed to
paint elements on screen). After restarting (I waited a few minutes),
I saw that SuperDuper had finished his daily backup at exactly the
same time. And obviously SuperDuper uses Growl to notify my of the
result.

Unfortunately, this bug cannot be reproduced at will. It happens now
and then (say 4 times out of 7). This is why it took me a while to
find the link with Growl. However, I've noticed it quite a few times
recently (I have Growl notifications from many apps.)

Unfortunately too, this really looks like a nightmarish bug. I'm not a
programer so I don't know how to help you in finding the cause. Of
course, I have tried disabling Growl before playing WoW, and I must
say that I did not have crash then, but unfortunately, the randomness
of the crash makes it hard to use this fact as a strong proof.

SuperDuper itself cannot be the cause because the app quit gracefully
after ejecting the disk, as can be seen in the app's log. Of course, I
still had my daily backup done even when I disabled Growl
notifications. (So that Growl would be the only variable as much as
possible.)

I have never had such a video freeze even if WoW was running when WoW
was in the background (say I am looking at a website). WoW runs in
windowed mode, full screen. I have the latest version of WoW
(3.3.2)... and Growl 1.2.

Here's the system message log, starting with the last few messages
from Racoon until the first restart messages. There are a few minutes
missing between the disk eject and the first OpenGL error messages. I
think the system was "stunned", because I can attest the freeze
occurred at 20:27

—————————————————————————————————————
2010-03-03 20:26:01     racoon[28]      IKE Packet: transmit success.
(Initiator, Quick-Mode message 1).
2010-03-03 20:26:01     racoon[28]      IKE Packet: receive success.
(Initiator, Quick-Mode message 2).
2010-03-03 20:26:01     racoon[28]      IKE Packet: transmit success.
(Initiator, Quick-Mode message 3).
2010-03-03 20:26:02     racoon[28]      IKEv1 Phase2 Initiator: success.
(Initiator, Quick-Mode).
2010-03-03 20:27:05     KernelEventAgent[50]    tid 00000000 received
event(s) VQ_NOTRESP (1)
2010-03-03 20:27:05     KernelEventAgent[50]    tid 00000000 type 'afpfs',
mounted on '/Volumes/Time Capsule', from
'afp_0TSQUm1yNy5200mmYF0Pyetl-1.2d000004', not responding
2010-03-03 20:27:05     KernelEventAgent[50]    tid 00000000 found 1
filesystem(s) with problem(s)
2010-03-03 20:27:05     KernelEventAgent[50]    tid 00000000 received
event(s) VQ_NOTRESP (1)
2010-03-03 20:27:06     kernel  ASP_TCP Disconnect: triggering reconnect by
bumping reconnTrigger from curr value 0 on so 0x8a3c7f8
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect started /Volumes/
Time Capsule prevTrigger 0 currTrigger 1
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect:  doing reconnect
on /Volumes/Time Capsule
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect:  posting to KEA
EINPROGRESS for /Volumes/Time Capsule
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect:  Max reconnect
time: 30 secs, Connect timeout: 15 secs for /Volumes/Time Capsule
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect:  connect to the
server /Volumes/Time Capsule
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect:  Logging in with
uam 10 /Volumes/Time Capsule
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect:  Restoring
session /Volumes/Time Capsule
2010-03-03 20:27:06     kernel  AFP_VFS afpfs_DoReconnect:  get the
reconnect token
2010-03-03 20:27:16     hdiejectd[19418]        quitCheck: calling exit(0)
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03b803bc 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03b803bc 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03b803bc 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03b803bc 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:19     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:19     kernel  0000006e
2010-03-03 20:30:19     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:19     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:19     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03be03c0 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:20     kernel  NVDA(OpenGL): Channel exception! exception
type = 0xd = GR: SW Notify Error
2010-03-03 20:30:20     kernel  0000006e
2010-03-03 20:30:20     kernel  00200000 00008297 00000474 00000004
2010-03-03 20:30:20     kernel  0000047e 000015f0 03c103c1 00000009
2010-03-03 20:30:20     kernel  00000000 00000000 00000000
2010-03-03 20:30:40     kernel  NVDA(OpenGL): Channel timeout!
2010-03-03 20:31:00     kernel  NVDA(OpenGL): Channel timeout!
2010-03-03 20:31:20     kernel  NVDA(OpenGL): Channel timeout!
2010-03-03 20:31:40     kernel  NVDA(OpenGL): Channel timeout!
2010-03-03 20:32:00     kernel  NVDA(OpenGL): Channel timeout!
2010-03-03 20:32:55     kernel  NVDA(DisplayBase): Channel timeout!
2010-03-03 20:34:03     racoon[28]      IKE Packet: transmit success.
(Initiator, Quick-Mode message 1).
2010-03-03 20:34:06     racoon[28]      IKE Packet: transmit success. (Phase2
Retransmit).
2010-03-03 20:34:09     racoon[28]      IKE Packet: transmit success. (Phase2
Retransmit).
2010-03-03 20:34:12     racoon[28]      IKE Packet: transmit success.
(Initiator, Aggressive-Mode message 1).
2010-03-03 20:34:12     racoon[28]      IKE Packet: transmit success. (Phase2
Retransmit).
2010-03-03 20:34:15     racoon[28]      IKE Packet: transmit success. (Phase1
Retransmit).
2010-03-03 20:34:15     racoon[28]      IKEv1 Phase2: maximum retransmits.
(Phase2 maximum retransmits).
2010-03-03 20:34:18     racoon[28]      IKE Packet: transmit success. (Phase1
Retransmit).
2010-03-03 20:34:21     racoon[28]      IKE Packet: transmit success. (Phase1
Retransmit).
2010-03-03 20:34:22     racoon[28]      IKEv1 Phase1 AUTH: success. (Initiator,
Aggressive-Mode Message 2).
2010-03-03 20:34:22     racoon[28]      IKE Packet: receive success.
(Initiator, Aggressive-Mode message 2).
2010-03-03 20:34:22     racoon[28]      IKEv1 Phase1 Initiator: success.
(Initiator, Aggressive-Mode).
2010-03-03 20:34:22     racoon[28]      IKE Packet: transmit success.
(Initiator, Aggressive-Mode message 3).
2010-03-03 20:34:27     racoon[28]      IKE Packet: transmit success.
(Information message).
2010-03-03 20:36:34     kernel  npvhash=4095
2010-03-03 20:34:27     racoon[28]      IKEv1 Information-Notice: transmit
success. (Delete ISAKMP-SA).
2010-03-03 20:36:34     kernel  PAE enabled
2010-03-03 20:36:34     kernel  64 bit mode enabled
2010-03-03 20:36:34     kernel  Darwin Kernel Version (etc)
—————————————————————————————————————

As you can see, it is in time with the end of the SuperDuper backup
"event". Here are the last few lines of SuperDuper's log :

—————————————————————————————————————
| 08:27:02 PM | Info | ......COMMAND => Updating boot cache on '/
Volumes/Users'
| 08:27:02 PM | Info |       Did not update boot cache on Users
because it does not contain an operating system.
| 08:27:02 PM | Info | ...ACTION: Restoring Spotlight state on Users
| 08:27:02 PM | Info | ......COMMAND => Restoring Spotlight search
indexing state on Users
| 08:27:03 PM | Info |       /Volumes/Users:
| 08:27:03 PM | Info |          Indexing and searching disabled.
| 08:27:03 PM | Info |       Indexing enabled on Users
| 08:27:03 PM | Info | ...ACTION: Unmounting Users
| 08:27:03 PM | Info | ......COMMAND => Unmounting '/Volumes/Time
Capsule/Sauvegarde/MacBook Pro/Users.sparsebundle'
| 08:27:06 PM | Info |       "disk1" unmounted.
| 08:27:06 PM | Info |       "disk1" ejected.
| 08:27:06 PM | Info | Copy complete.
—————————————————————————————————————

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