Have you considered corrupt RAM.
A long time ago I had Power Computing clone exhibit weird behavior - ended up being corrupt stick that was OK for Data Writes but as soon as data was called from stick was corrupting data and crashing apps, machine, locking up etc randomly. And most recently with my G5 similar problem - this time it was crashing/freezing when writing to stick.
I'd try pulling some RAM down to 128MB (yeah I know X will struggle) but at least you might identify prob. Then start adding sticks until problem occurs. If you then remove stick put in prior to problems occurring and it resolves then problem found.
Sorry if this repeats someone elses suggestion as I haven't been following thread until now.
Just had thought, there is an Application called Memstest for OSX which can help to identify problem RAM - do a Google search and if you don't do unix drag the exec file to terminal window to create directory path to file to run "application"
Cheers and hope that helps
Simon
On 17/01/2005, at 10:30 AM, Sven Radke wrote:
On 16.01.2005, at 21:45, Peter Udbj�rg wrote:
More weird stuff:
Almost every time I go on-line with OSX, usually Safari, the screen suddenly goes black. Or if iTunes tries to find radio stations, or if I connect to another machine on Ethernet. Sometimes I also get one half of the screen to become stripes, as if the image to the right of the striped part has been smeared out. Dialog boxes can be moved in and out of the striped area, and emerge whole. The only way to get the screen back whole is to restart, usually by alt-crtl-power. As the machine boots again, I get a glimpse of the last contens of VRAM, and taht is always whole and unstriped.
Other times the screen becomes all stripey, occasionally with a brown square filling about half the screen from top to bottom, and the mouse pointer becoming a whitish stripey shimmering block (that moves around like a real pointer). Once again, a reboot is the only way out.
Opening IE for X (5.2 i think), crashes the Mac, that is total freeze and no mouse pointer at all, a few seconds into the drawing of the page it opens to (msn.com).
I have a rev. III desktop G3 running OSX Panther (with XPF), with plenty of RAM. Could it be something about the VRAM?
- Peter U.
if u have used the archive u found:
ok, I've found the cause of the screen goes black problem.
Check and see if your kernel spews out the following messages while booting (you can do this by typing "dmesg" once it's booted):
extension "com.apple.iokit.IOGraphicsFamily" cannot be found can't determine immediate dependencies for extension com.macsales.iokit.OpenG3AIODisplay Can't determine dependencies for com.macsales.iokit.OpenG3AIODisplay. extension "com.apple.iokit.IONDRVSupport" cannot be found can't determine immediate dependencies for extension com.macsales.iokit.GossamerNDRVSupport Can't determine dependencies for com.macsales.iokit.GossamerNDRVSupport. Couldn't alloc class "OpenG3AIODisplay" Couldn't alloc class "GossamerNDRVSupport"
I noticed that I get the screen goes black problem when these messages are present and I don't when they aren't.
If you get the messages, it means that the system doesn't know enough about these XpostFacto kernel extensions. To teach the system, do the following as root:
cd /System/Library/Extensions kextcache -k GossamerNDRVSupport.kext kextcache -k OpenG3AIODisplay.kext
and reboot.
Once booted, those messages should no longer be present.
Do not select the "use old NDRV" option in xpostFacto. Only select the
"use PatchedRagePro" option. But make sure to modify the options before
doing the kextcache thing because it seems that the problem occurs
when XpostFacto makes changes in the /System/Library/Extensions
folder. I think you can emulate the problem by simply doing
"touch /System/Library/Extensions".
hth Sven
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