Date: Thu, 31 May 2012 13:02:15 +0200 From: Marius Strobl <marius@alchemy.franken.de> To: Ian Lepore <freebsd@damnhippie.dyndns.org> Cc: "freebsd-stable@freebsd.org Stable" <freebsd-stable@freebsd.org> Subject: Re: Boot hangs on v9 system at CD device probe Message-ID: <20120531110215.GA78200@alchemy.franken.de> In-Reply-To: <1338419624.36051.94.camel@revolution.hippie.lan> References: <CAN6yY1vV-_Dt=2SRy2A-ppPQBHmz2FfjU-JzsNNFAB_xBV%2BoHA@mail.gmail.com> <1338419624.36051.94.camel@revolution.hippie.lan>
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On Wed, May 30, 2012 at 05:13:44PM -0600, Ian Lepore wrote: > On Wed, 2012-05-30 at 14:54 -0700, Kevin Oberman wrote: > > I sent a note about this a couple of weeks ago, but have not heard > > anything. I'm really getting a bit desperate. > > > > I have a system that I am trying to upgrade from 8.2 to 9.0. I have > > built it and installed the kernel, but it fails to boot. The boot > > freezes after probing for my hard drives during the probe of the > > CDROM. It just sits there, seemingly forever, though I have never > > waited longer then a few minutes. > > > > The system is a SuperMicro C25BX mother board. The DVD is PATA, > > reported on boot of 8-Stable as: > > acd0: DVDR <ATAPI DVD A DH20A4P/9P59> at ata2-master UDMA66 > > > > If I unplug the CDROM, it boots fine, but I really need the device on > > the system, so I really can't leave it unplugged. Also, after the 9 > > kernel is installed, my Mk file have been updated so that I can't > > build some ports if I boot the 8.2 kernel. Does anyone remember this > > being reported by others? It was most likely on current, as it was > > probably prior to the release of 9. I googled around, but could not > > find it. > > > > I'd really appreciate it if anyone can point me toward a solution. > > > > Thanks, > > When faced with a mystery like this I sometimes go into the mode of > "poke it with a stick and see if it twitches." If you can get it to > twitch at all, maybe that's a starting point. In this case, I guess I > might start with seeing if setting hw.ata.atapi_dma=0 in the loader > makes any difference. > Note that hw.ata.atapi_dma isn't honored by 9.0 with options ATA_CAM (default in GENERIC). Support for that loader tuneable was only resurrected rather recently (but is available in stable/9). The equivalent for 9.0 would be setting hint.ata.X.mode to PIO4 where X is the number of the ata(4) device attached for the channel the CDROM is connected to. ATA_CAM is indeed known to break ATAPI DMA for some ATA controllers though. What's the `pciconf -lv` output for this one? Marius
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