Are there any tools to analyze kernel panics in G4 iMac?

[rsavage]

At the yaboot prompt type:

live video=offb:off nouveau.modeset=0 single

This will freeze or give you a blank screen. You will have to judge blind when the machine has finished booting which can be longer than you think. Type the command (you won't see what you type):

modprobe nvidiafb

Text should now appear on the screen.

If it doesn't reboot (type reboot), but this time use:

modprobe rivafb

You can start the desktop with

start lightdm

EDIT: In 12.10 you may have to force a higer colour depth. For example "modprobe nvidiafb mode_option=1024x768-16"

[este.el.paz]

@rsavage:

Thanks for your attention to my problem . . . it looks like you are providing a way to run the Lubun LiveDVD in such a way that the screen resolution will be improved???? Rather than giving me a way to somehow analyze or repair the "2 bad sectors"??? Certainly if I can see the screen more clearly it might help, but then are there any tools loaded in the LiveDVD that can "analyze" why the kernel panics are happening in both the internal HD running Xu/Lu 12 and the OSX side? If I could somehow "deep clean" the HD would that fix the kernel panics?

I can certainly try out your commands from the LiveDVD and that might get me to a read-able GUI and then I might find the DU "repair problems" tab??? It's not that I'm looking to run my computer from the install DVD all the time, but how to figure out why it's crashing ????? HD dying or "bad sector"???? Don't know . . . but, thanks for the guidance . . . so far the Xu/Lu has been the best in the iMac G4 . . . but, again, now some issue with kernel panics.

e.e.p.

[este.el.paz]

@rsavage:

Ran those commands using my Lubun 12 install DVD, waited until no more Op drive sounds, entered the "modprobe" . . . nothing happened . . . tried the second modprobe rviafb . . . nothing, no text. Then I typed "start lightdm" the Op drive made a few sounds . . . . I'm looking at a greyish screen with three vert lines, two yellow, one blue on the left third of the screen . . . . Is there a flashing boot prompt? Can't see it.

e.e.p.

[rsavage]

Corrected. Forgot to turn off KMS.

[este.el.paz]

@rsavage:

OK, that worked and got me into a clean GUI . . . and I checked DU and ran the "self-test" and it came back with #5 WARNING-reallocated sector count" . . . "2 bad sectors" . . . . But, as originally posted I don't know how to repair the bad sectors if that is possible?? Problem is the partition is split . . . and kernel panics happening on both sides, but is there a way to "repair disk" as there is with OSX, but doing it from the Lubuntu install disc? Interestingly, I tried your edited commands the first time, got to DU and when I clicked on the "self test" button the app crashed and the toolbar fell off the screen . . . . I tried again and got back to DU and was able to run the self test; I tried the Benchmark option but "operation failed."

e.e.p.

[este.el.paz]

et al:

The latest update on the kernel panics . . . is that they seem to have abated . . . for reasons that don't entirely make sense. I was on the track that it is/was a hardware problem, finally got around to unplugging the ethernet while simultaneously running "applejack" from the OSX side, thanks to some help from the Apple discussion forum. That managed to get many hours of run time on the iMac yesterday w/o ethernet, and then plugged it in and had no problems. I even rebooted into Xu/Lu and got an error message telling me that "a crash was detected now or recently" . . . other than that no problems. The only issue was that w/o the ethernet plugged in I couldn't get the wireless to work in either OSX or Linux side.

But, this brings me back to this forum and my question about whether there are any apps that do "deep cleaning" on the Linux side, as perhaps applejack has done from the OSX side? Is there some "fsck" command that would clean cache? I'm not sure if I'm out of the woods on this problem, but previously it was hard to run it longer than 15 mins., but considering that before the kernel panics were happening in both OSX & linux it's not clear why running applejack in OSX will let both sides run?? It's been cooler here and there might have been some problems with hot weather in the previous weeks. I did see how kernel panics do something so that the chances of kernel panics is increased, but how is it that the Linux system seems to have gotten over the problem . . . seemingly w/o any "deep cleaning"???

e.e.p.

[este.el.paz]

Folks:

Bumping this up since there hasn't been any response to the latest question or even to the title of the thread asking about tools or utilities for Linux that could either do "deep cleaning" like "applejack" or that can diagnose issues that would be causing kernel panics in two separate partitions . . . ??????

I can't conclude that it isn't necessary, because both the Linux side and the OSX side were plagued with kernel panics for quite awhile . . . .

e.e.p.