Date: Sat, 22 Nov 2014 10:09:04 +0200 From: Jukka Ukkonen <jau789@gmail.com> To: Nathan Whitehorn <nwhitehorn@freebsd.org> Cc: "freebsd-ppc@FreeBSD.org" <freebsd-ppc@FreeBSD.org> Subject: Re: Booting freebsd on a powermac g4 from a CD Message-ID: <06B7F5FE-7677-4832-85D7-8901C003AB7F@gmail.com> In-Reply-To: <546FB34E.6080006@freebsd.org> References: <546E38E4.70305@gmail.com> <546E3959.5020904@freebsd.org> <20141121055732.GB56272@FreeBSD.org> <546F028D.9040907@gmail.com> <546F6C90.4040005@freebsd.org> <003B9EAA-E1AD-45C6-AC56-4331BCDE4193@gmail.com> <546FB34E.6080006@freebsd.org>
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Sent from my iPad > On 21 Nov 2014, at 23:49, Nathan Whitehorn <nwhitehorn@freebsd.org> wrote:= >=20 >=20 >> On 11/21/14 12:08, Jukka Ukkonen wrote: >>=20 >> Sent from my iPad >>=20 >>> On 21 Nov 2014, at 18:47, Nathan Whitehorn <nwhitehorn@freebsd.org> wrot= e: >>>=20 >>>=20 >>>>> On 11/21/14 01:14, Jukka Ukkonen wrote: >>>>>> On 11/21/14 07:57, Alexey Dokuchaev wrote: >>>>>>> On Thu, Nov 20, 2014 at 10:56:25AM -0800, Nathan Whitehorn wrote: >>>>>>> On 11/20/14 10:54, Jukka Ukkonen wrote: >>>>>>> What might be the current official method or at least known >>>>>>> working method for booting FreeBSD on a PowerMac G4 from a CD? >>>>>> You should just be able to insert the CD and hold 'C'. Does that not >>>>>> work for you? What model of G4 is this? >>>> Right, I needed the CD boot only to fix an existing FreeBSD-10.1 >>>> installation which had started hanging during boot time autoconfig >>>> right after having displayed gem0 MAC address. >>>> These odd systematic hangs began after updating from 10.1-RC3 to >>>> 10.1. >>>>=20 >>>> So, I installed an alternative 10.1 kernel from the CD. >>>> It booted without any major problems both from the CD and from >>>> the hard disk. The only apparent difference in my locally built >>>> kernel was that it used VT instead of syscons. >>>> The default ppc kernel on the CD seems to be using syscons. >>>> Obviously I rebuilt the kernel locally once more switching back >>>> from VT to syscons. Rebooting with the new locally built kernel >>>> which uses syscons worked just fine again. >>>> So, my quick hypothesis is that VT must be somehow broken. >>>>=20 >>>> An additional little brain teaser I found while fixing the >>>> dysfunctional boot with the VT enabled kernel was that when >>>> I boot the ppc system from a CD it seems to be quite happy >>>> to work with a PS/2 keyboard connected to a USB adapter. >>>> When I boot the system from hard disk this adapter and the >>>> PS/2 keyboard connected to it are not recognized at all. >>>> Here is what "usbconfig list" tells about the gizmo... >>>>=20 >>>> ugen1.2: <product 0x0018 vendor 0x13ba> at usbus1, cfg=3D0 md=3DHOST sp= d=3DLOW >>>> (1.5Mbps) pwr=3DON (400mA) >>>>=20 >>>> Anyhow it seems that for now it makes sense to stick to >>>> using syscons instead of VT on ppc unless one wishes to >>>> start debugging VT code. >>>>=20 >>>> Cheers, >>>> --jau >>>>=20 >>> This is very confusing to me. Are the kernel configs really *completely*= identical aside from VT vs. syscons? VT uses the same code on PPC to use th= e framebuffer as syscons and doesn't touch any of this other stuff. 10.1 als= o doesn't have vt in GENERIC -- only 11 has that. Are you sure you didn't in= stall an 11 image instead? >>> -Nathan >> Yes, the only diff was commenting sc out and putting vt in. >> I even named the modified version VTGENERIC to remember >> that this configuration shall never carry any other changes. >>=20 >> --jau >=20 > OK, that's instructive anyway. How about the 10.1 CD thing? The 10.1 ISOs h= ave only syscons. > -Nathan As I tried to explain before, the kernel on the 10.1 CD works. That is how I figured out that the console code must be somehow the culprit. My first local 10.1 build, which hanged during the boot, used VT, though, otherwise it was built using a completely normal GENERIC configuration. Both the kernel on the 10.1 CD and my second local build have used syscons, and they do not experience the mysterious hangs. --jau
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