Date: Thu, 16 Jan 2003 23:39:34 +0100 From: "Coercitas Temet'Nosce" <coercitas@hotmail.com> To: <freebsd-current@freebsd.org>, "David Spreen" <netzwurm@debian.org> Subject: Re: No way to disable loading of agp.1 on boot? Message-ID: <OE67cUtI9dm5UxP9Fek000004e7@hotmail.com> References: <87y95lvs7l.fsf@foobar.toppoint.de>
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Hi there,
problem isn't REALLY agp related, it is just because the PCI bridge tries to
use some resources the BIOS left off or that are not enabled correctly by
the device driver. There is a tunable value you can set to 0 to avoid this,
just hit spacebar when loader prompts it and type :
hw.pci.enables_io_modes=0
It will normally prevent your system to hang while testing this driver.
If this doesn't work (it SHOULD work btw) just try this :
hw.pci_allow_unsupported_io_range=1
It allows the PCI bridge to pass through an unsupported memory range
assigned by the BIOS. This tunable value set to OFF (0) by default.
Let me know if it helped :o)
regards
----- Original Message -----
From: "David Spreen" <netzwurm@debian.org>
To: <freebsd-current@freebsd.org>
Sent: Thursday, January 16, 2003 1:44 AM
Subject: Bug: No way to disable loading of agp.1 on boot?
> Hey there,
> I just tried to install freebsd 5.0RC3 on my laptop but the
> mini-inst-iso kernel hangs before entering the install-screen.
>
> The last two lines shown are (boot -v):
>
> agp0: <Intel 82443BX (440BX) host to PCI bridge> mem 0-0x3ffffff at \
> device 0.0 on pci0
>
> agp0: allocating GATT for aperture of size 64M
>
> Anyway, I don't need agpsupport for an installation-process, so I
> tried to disable agp on boot-prompt.
>
> I looked for a hint-variable but there doesn't seem to exist one.
> anyway, lsmod shows agp.1 in the modules: section, so I thought about
> disable the loading of that module.
>
> Well, after an "unload; disable-module agp (which worked, he said he
wouldn't
> load it anymore); load kernel;" an lsmod still shows agp.1.
>
> Is this a bug or can't I disable agp-support on installation cdroms?
>
> The machine doesn't detect agp-devices when booting with boot-floppies, so
> I think that should be possible with the cd too.
>
> I am fairly new to freebsd and I read the documentation about hints and
> also about the boot-prompt. Additionaly I asked google and dejagoogle for
> this issue and got no help.
>
> If I still left out a possibility I am sorry for making noise.
>
> so long...
>
> David
>
>
>
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