Date: Sun, 20 Jun 2010 14:01:52 -0500 From: Nathan Whitehorn <nwhitehorn@freebsd.org> To: Paul Mather <paul@gromit.dlib.vt.edu> Cc: freebsd-ppc@freebsd.org Subject: Re: 8.1-RC1 fails to boot on iBook G4 Message-ID: <4C1E65A0.9030800@freebsd.org> In-Reply-To: <1D327CFF-291D-4AC1-89F4-24A689303475@gromit.dlib.vt.edu> References: <ACC43406-4175-40E5-A974-A72A54EF55E8@gromit.dlib.vt.edu> <4C1A253C.7040905@freebsd.org> <1D327CFF-291D-4AC1-89F4-24A689303475@gromit.dlib.vt.edu>
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On 06/19/10 10:29, Paul Mather wrote: > On Jun 17, 2010, at 9:38 AM, Nathan Whitehorn wrote: > > >> On 06/16/10 21:13, Paul Mather wrote: >> >>> I just tried to book the 8.1-RC1 disc1 ISO on an iBook G4 but it failed to boot into FreeBSD. I was left at the Open Firmware prompt. Is FreeBSD known not to work on an iBook G4? I was able to boot successfully into the FreeBSD installer using this same disc on a PowerBook G4. >>> >>> >> That should work perfectly fine. I have a G4 iBook of the same model running FreeBSD. >> >> >>> Decrementer exception at %SRR0: 00100100 %SRR1: 10003030 >>> >>> >> This is a very rare race during early initialization that happens on some machines and that no one has been able to track down. A timer seems to have gone off in the middle of the OF->kernel transition. It's possible that if you wait a different amount of time at the boot prompt it won't happen. >> > I tried waiting a different amount of time during a couple of boot attempts, but it made no difference. Some of the times I waited until different points during the countdown to boot before pressing the return key, and at least once I pressed space to go to the boot prompt and let it sit there for a while before issuing "boot." Every time, it failed to boot FreeBSD. > > Almost always, I get the "Decrementer exception" error above, but once I got something akin to a "Memory access error" reported, with the same %SRR0 and %SRR1 values. I even reset the iBook's PRAM via Command-Option-P-R, but to no avail. > That's very strange -- 0x00100100 is the very first instruction in the kernel, so it hasn't even had a chance to run yet. Maybe there is a hardware problem with your CD drive? Can you check that the MD5 of the disc matches the one on the FTP site when read from your iBook? -Nathan
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