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andyeb
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PostPosted: Tue Nov 16, 2004 1:51 pm    Post subject: iBook G4 won't boot Reply with quote

OK, I've got 2004.3 install on my iBook G4 - followed the instructions through up until installation of yaboot and rebooting the system. However when I come to reboot the system, I get to the first stage yaboot prompt but then the computer doesn't accept any keyboard input and does not end up booting. I have managed to get back into OS X by holding down ALT at startup and selecting the OS X boot volume, but I can't boot gentoo.

I had YDL 3.0.1 installed previously (which installed yaboot), but I don't know whether the yaboot boot prompt coming up is the one installed as part of the gentoo installation process, or one left over from YDL.

The strange thing is, mkofboot and ybin both run and give normal output, so I don't understand why this isn't working. Here is my partition scheme:

hda1 apple partition map
hda2 boot (1MB HFS)
hda3 swap
hda4 / (ext3)
hda5 data (HFS)
hda6 System (OS X 10.3.6 HFS+)
hda7 free space

Kernel is held on the main linux partition (hda4)

I managed to boot of the LiveCD again and went in and verified my yaboot.config and so on... couldn't see anything amiss.

Any suggestions on where to start troubleshooting this?

many thanks,

Andy

PS. I'm a fairly experienced x86 linux user, but I'm new to using linux on PPC. I used to use Lilo on x86.
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andyeb
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PostPosted: Tue Nov 16, 2004 2:35 pm    Post subject: Reply with quote

I've got a little further now - I modified the ofpath in yaboot.config... so now I get to the stage 1 prompt and get:

invalid memory access

:cry:
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andyeb
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PostPosted: Tue Nov 16, 2004 7:15 pm    Post subject: Reply with quote

Here is a bit more info, I'm using a 2.6 kernel (gentoo-dev-sources as shipped on the live CD).

I have now tried:

- zapping PRAM on bootup (cmd+opt+p+r) three times in a row
- adding ofboot=hd:2 (bootstrap partition is dev/hda2 and re-installing yaboot

However I'm still getting the same symptoms before - the screen flashes a few times immediately after startup - usually see half of the screen flash green. After about three flashes (of about half a second each), eventually I see the stage 1 yaboot prompt, but no keyboard input is acceptable at all - reaching for the power button is the only option.

A few more system details (I was in a rush at the end of my lunchbreak before ;) )...

- 12" G4 iBook (bought on the day the new models came out Oct 03)
- 800Mhz
- 640MB RAM
- no bluetooth
- airport extreme
- radeon 7500 (I _think_, Apple's system profiler shows it up as ATi RV280M9+) 32MB RAM.

I've been trawling the net trying out things as I've found them, but no cigar so far.

any help much appreciated.

Andy
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andyeb
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PostPosted: Wed Nov 17, 2004 9:07 am    Post subject: Reply with quote

Ah scratch that :evil:

...back to OS X it is then.

For the record, the finger of suspicion currently points at iPartition - an OS X application I used to non-destructively repartition my disk to make room for Linux. I'm wondering if it did something not quite right, which basically works most of the time, but was causing yaboot to choke.

I blitzed the bootstrap partition and now I can boot OS X again 8)
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